Email security

Real-threat phishing simulations+11

An AI-Native Company Dedicated to Cybersecurity. Built by AI insiders with an outsider's perspective: Behavior is the future of cyber defense.

Abnormal Security

Behavioral AI email threat detectionAPI-based cloud email protection+10

Behavioral AI that protects email, identity, and AI, and stops insider threats.

Abusix

Commercial DNSBL for email threat blocking+9

Abusix is the essential solution in today's network security landscape, enabling fast and reliable mitigation of network abuse and cyber threats.

Adaptive Security

AI-driven security awareness training+9

Unified security awareness training, email security, and AI governance built for the AI era.

Aegis AI

Autonomous AI agent threat detection+5

Our AI-native culture drives continuous reinvention and bold innovation. We embrace change, push to stay ahead of adversaries, and collaborate without ego, all while fiercely securing our customers' data as the foundation of their trust.

AirMDR

Endpoint Detection & Response (EDR)

AI virtual analyst for MDR triage+11

We're passionate about delivering awesome detection and response to security teams of all sizes.

AppRiver

Phishing and ransomware attack blockingConversation hijacking prevention+7

AppRiver is an email security vendor now operating under OpenText Cybersecurity after its acquisition by Zix and then OpenText. In the email-security scope, it is known for cloud-delivered filtering, phishing and malware blocking, and encrypted message delivery for organizations that want to protect Microsoft 365 and other email environments without deploying on-premises appliances. Its portfolio also includes adjacent compliance functions such as archiving and continuity, but the core buyer is typically a small-to-mid-sized business or managed service provider looking for managed email protection and encryption.

Area 1 Security (Cloudflare)

Pre-delivery phishing detection+10

Cloudflare started as a simple application to find the source of email spam. From there it grew into a service that protects websites from all manner of attacks, while simultaneously optimizing performance.

Avanan

AI-driven phishing and BEC detectionPost-delivery threat remediation+7

Avanan is an email security product now sold under Check Point’s Harmony Email Security line, focused on protecting Microsoft 365 and adjacent collaboration channels from phishing, business email compromise, malware, ransomware, and data leakage. It deploys as a cloud app with no MX-record change and is positioned for organizations that want inline and post-delivery controls without replacing their existing mail stack. Its main fit is for Microsoft 365 customers that need layered protection beyond native filtering, including account-compromise and data-loss controls.

Barracuda

Cloud-based email gateway defense+10

Barracuda is a leading cybersecurity company providing complete protection against complex threats

Binary Defense

Managed Detection & Response (MDR)

24x7x365 SOC monitoring of endpoints, servers, and cloud resources using behavioral-based detections to identify anomalies, lateral movement, privilege escalation, and PowerShell injection

Binary Defense delivers a human-led, 24x7x365 Managed Detection & Response (MDR) service that detects and isolates threats early in the attack lifecycle using behavioral-based detections and an attacker’s mindset. Their Security Operations Center analysts triage, disposition, and prioritize events, conduct full kill chain analysis, and provide tactical and strategic mitigation recommendations. Best suited for organizations needing an extension of their security team, whether they have an existing team or none, Binary Defense MDR operates as a cloud-based, tool-agnostic service integrated via their BD Platform. The vendor also offers adjacent capabilities like MDR Plus with managed deception and malware disruption, but core MDR focuses on analyst-driven monitoring and response.

Bitdefender

Endpoint Detection & Response (EDR)

11 products

At Bitdefender, cybersecurity isn't just what we do, it's who we are. For over two decades, we've been at the forefront of protecting individuals, businesses, and governments against sophisticated cyber threats and attacks. Our AI-driven technologies and world class security expertise make us a trusted partner in safeguarding what matters most.

Automated cross-endpoint attack correlation+10

Cisco

Zero Trust / SASE / SSE

14 products

Cisco Umbrella is a cloud-delivered Security Service Edge (SSE) solution that enforces zero trust by continuously verifying identity, device posture, and context before granting access to applications. It converges multiple security functions, secure web gateway, firewall-as-a-service, cloud access security broker, and zero trust network access, into a unified cloud platform. Cisco Umbrella serves enterprises requiring distributed security across remote workers, branch offices, and on-premises infrastructure without complete network architecture overhauls.

CASBCisco SD-WAN integration+16

Cloudmark

Patented message and content fingerprinting technology analyzes email payloads to identify and block known spam and malware variants with high accuracy across SMTP traffic.

Cloudmark, now part of Proofpoint, delivers carrier-grade email security primarily for service providers and large-scale messaging environments, protecting over 1.6 billion mailboxes globally. Its Cloudmark Platform for Email automatically detects and mitigates spam, phishing, malware, and other email-borne threats using patented content fingerprinting, URL/CTA analysis, and machine learning. The solution functions as a high-performance mail transfer agent (MTA) integrated at the network edge, offering flexible policy controls and an integrated reputation system. While Cloudmark also supports mobile and rich communications, its core Email Security role targets telecom operators and hosted email providers requiring near-zero false positives and real-time threat blocking.

Cofense

Post-delivery phishing threat detectionThreat remediation and containment+10

Smarter Phishing Defense. Stronger Human Security.

Command Zero

Agentic SOC & Investigations

Autonomous alert triage+10

Command Zero is the autonomous and AI-assisted SOC platform built for complex enterprise environments. The platform combines an expert-encoded knowledge base, controlled AI agents, and human-led investigation tools to deliver consistent, auditable analysis at scale. Through a federated data model, Command Zero connects directly to an organization's existing data sources, identity systems, EDR, cloud platforms, SIEM, without data ingestion or migration.

Coro

AI-driven phishing and malware prevention+11

Most security stacks get unmanageably complex as your business grows. Coro consolidates endpoint, email, cloud, network, identity, data protection, and security awareness training into one unified platform.

CyberSentriq

MX-based gateway email security with sandboxing

Complete email security, backup, retention, and recovery in one unified platform - helping you protect customers, simplify management, reduce risk, and grow predictable recurring revenue with confidence.

Cybonet

Multi-layered anti-virus and anti-spam filtering for mail servers using modular engines to block known malware and spam at the perimeterSandboxing of email attachments to detect and prevent execution of unknown or zero-day malware before delivery to end users

Cybonet, formerly PineApp Ltd founded in 2002, delivers enterprise email security primarily through its Mail Secure product, which operates as a secure email gateway stopping malicious threats at the network perimeter. The solution targets SMB to enterprise markets, offering modular anti-virus, anti-spam, sandboxing, and content filtering in on-premises or cloud deployments. While Cybonet offers adjacent capabilities like network visibility and SIEM, Mail Secure focuses exclusively on email threat prevention, encryption, archiving, and branding. It is best suited for organizations needing layered email defense without replacing existing mail infrastructure.

Cylerian

Security Operations

11 products

By consolidating visibility and control across your organization and providing everything you need out of the box, Cylerian makes IT simpler and safer.

Automated incident triage and response orchestrationReal-time threat detection and response

Cynet 360 AutoXDR with MDR

Managed Detection & Response (MDR)

10 products

At Cynet, we imagine a world where any company can have full cybersecurity protections. At Cynet, we are making enterprise-grade cybersecurity accessible, simple and affordable to organizations that don't have the same resources as the Fortune 1000.

24/7 threat monitoring and response+9

Darktrace

Network Detection & Response (NDR)

Continuously monitors network traffic+11

Darktrace is a network detection and response vendor centered on self-learning behavioral analytics for north-south and east-west traffic. Its NDR product baselines normal activity for users, devices, and segments, then flags anomalous connections, command-and-control behavior, data transfer outliers, and other suspicious network patterns in on-premises, cloud, and hybrid environments. The platform is aimed at teams that need visibility beyond endpoint telemetry and want automated investigation and containment for network-level threats, including encrypted traffic and novel attack paths. Darktrace also sells adjacent security products, but this profile is limited to NDR capabilities.

DigiCert

Identity & Access Management (IAM)

10 products

Trust built for the AI age

Device certificate authentication policiesAuthentication method controlCertificate issuance protocol support+5

DMARCian

Complete DMARC visibility and email ecosystem monitoring

Founded in 2012 by a primary author of DMARC, dmarcian's purpose is to see widespread adoption of DMARC.

EasyDMARC

DMARC deployment and management+11

3 products

We make DMARC deployment EASY and provide a solution that requires no expert knowledge from customers.

Echoworx

Policy-driven email encryption layer+11

Echoworx provides an integrated infrastructure layer that replaces rigid encryption point products. We help enterprises move to the cloud, modernize communications, and protect sensitive data with secure communications built for how business works now, not how it worked years ago.

Egress

Outbound email encryption+11

Enable secure and compliant email communication without adding friction. Make it easy for your teams, customers, and partners to work securely and prevent data leaks using encrypted email and simplified DLP policies.

ESET

Spam filtering for inbound mail+10

14 products

ESET Mail Security provides multilayered protection for Microsoft Exchange servers, scanning mailboxes, public folders, and hybrid Microsoft 365 environments. It uses proprietary anti-spam engines with SPF/DKIM validation, backscatter protection, and SMTP safeguards, alongside anti-malware scanning for attachments including corrupted or password-protected archives. A 64-bit architecture supports clustering for high-performance mail processing. Optional modules include Advanced Threat Defense and LiveGuard for suspicious emails. Best suited for organizations prioritizing on-premises Exchange security with remote management via ESET PROTECT console and comprehensive rule-based filtering.

Fortinet

Firewall / NGFW

Next-generation firewall inspection+10

Fortinet’s FortiGate line is the company’s Firewall/NGFW offering, covering stateful firewalling, application control, IPS, web filtering, SSL/TLS inspection, and threat-intelligence-backed blocking. It is widely deployed from branch and edge sites to enterprise perimeter and segmentation use cases, with hardware, virtual, and cloud form factors managed through the same Fortinet policy stack. Buyers typically choose it when they need firewall enforcement plus inline inspection and VPN capability in one appliance, especially in environments that already use FortiGuard threat feeds or the Fortinet Security Fabric. Adjacent products include SD-WAN and ZTNA, but those are not the core scope here.

Fortra

Deep Content Inspection for threat detection+11

Clearswift Secure Email Gateway is an enterprise email security gateway that inspects inbound and outbound mail for spam, malware, phishing, and data leakage before messages reach users or leave the organization. It is positioned as a deployment-flexible SEG for organizations that need on-premises, virtual appliance, or cloud delivery, and it is used by mid-market and enterprise buyers, including regulated sectors such as financial services, public sector, and defense. Its email scope is centered on threat prevention, content control, and outbound data protection rather than broader security platform functions.

Glasswall

Real-time attachment disarmament via CDR+8

Glasswall is a cybersecurity company that enables organisations to operate securely, safeguarding their data and networks with intelligent file protection. At its core, Glasswall's technology combines Zero Trust CDR with AI-powered threat detection, uniquely engineered to remove, predict, and counter unknown threats.

Graphus

AI-driven social engineering and zero-day attack detection

Graphus is a cloud email security product focused on Microsoft 365 and Google Workspace tenants. It detects phishing, spoofing, business email compromise, account takeover, malware, and ransomware attempts, then quarantines suspicious mail and warns users before they interact with it. The product is positioned for organizations that want API-based deployment without MX record changes, mail rerouting, or agents, and for MSPs or IT teams that need automated inbox protection with minimal operational overhead. It is offered as an anti-phishing and email-borne threat defense layer rather than a full secure email gateway replacement.

GreatHorn

ML/AI-driven phishing and BEC detection+8

GreatHorn is a cloud email security platform focused on detecting and remediating phishing, business email compromise, impersonation, credential theft, account takeover, malicious URLs, and payloads in Microsoft 365 and Google Workspace environments. It is positioned for enterprises that need post-delivery search-and-removal workflows, inbox-level remediation, and integration into broader security operations. GreatHorn is best suited for organizations that want to reduce manual phishing response across complex mail environments and connect email incidents to SOAR and SIEM tools.

Guardz

AI-driven phishing and malware detection+10

Guardz is a unified cybersecurity platform that includes email security for MSP-managed SMB environments, with a focus on API-based mailbox protection, phishing/BEC/ransomware detection, and automated quarantine. In the email security scope, it scans user and shared mailboxes, flags suspicious messages and attachments, and supports sender/domain blocking and allowlisting. Guardz is best suited for MSPs that want email controls managed from the same console as broader identity and endpoint protections, rather than a standalone email gateway.

Halon

Real-time spam, phishing, and malware detection using carrier-grade content filtering with industry-lowest false-positive rates for inbound email streams

Halon is a Swedish email infrastructure and security company founded in 2010, specializing in carrier-grade email threat detection and classification for service providers, inbox providers, and large-scale enterprise senders. Its core Email Security product, Halon Classify, is a specialized intelligence engine that performs real-time content filtering to identify spam, phishing, and malware with near-zero false positives. While Halon also offers the broader Halon Protect platform for rate limiting and link protection, Classify remains the focused component for inbound threat classification. The vendor is best suited for organizations managing custom mail infrastructure (MTAs) requiring precise, high-volume threat filtering without sacrificing performance.

INKY

Generative AI intent analysis+5

INKY is a cloud email security platform focused on phishing, impersonation, business email compromise, and data loss prevention for Microsoft 365 and other email environments. Its differentiator in the email security category is behavioral analysis combined with user-facing coaching: it renders messages visually, applies computer vision and machine learning, and adds inline warnings to help recipients make safer decisions. It is positioned for organizations and MSPs that want layered inbound protection and optional outbound controls without relying only on pattern-based filtering.

IRONSCALES

API-based cloud email threat detection+9

IRONSCALES is an AI-driven email security platform designed to detect and remediate advanced phishing, Business Email Compromise (BEC), and account takeover (ATO) attacks. It utilizes a hybrid approach combining machine learning algorithms with crowdsourced human intelligence to provide a decentralized self-learning system. The platform integrates via API with Microsoft 365 and Google Workspace, replacing or augmenting traditional SEGs with an Integrated Cloud Email Security (ICES) architecture.

LIBRAESVA

Adaptive Trust threat detectionSemantic intent analysis+7

Our privacy-first AI keeps your inbox and your business safe.

LuxSci

Automated HIPAA-compliant email encryption+9

LuxSci is a secure healthcare communications vendor whose email security offerings center on HIPAA-compliant message protection, policy-based encryption, and compliant delivery for organizations handling PHI. In the email-security scope, it is best known for secure high-volume transactional email, gateway-based encryption for Microsoft 365 and Google Workspace, and secure email hosting with auditability. It is aimed at healthcare providers, payers, digital health companies, and other regulated organizations that need encrypted email without sacrificing delivery at scale.

MailChannels

Real-time outbound spam filtering using machine-learning-driven detection and content classification for SMTP relay traffic to prevent spam outbreaks from compromised accounts.Automated compromised-account detection that identifies stolen mail accounts, web scripts, and application exploits used for mass mailing before email leaves the server.

Empowering safer connections in an open world.

MailGuard

Microsoft-native AI-powered email security for Microsoft 365

MailGuard, a GlobalGuard company, is a world leader in email security, providing both Secure Email Gateway (SEG) and Integrated Cloud Email Security (ICES) protection that detects and blocks sophisticated, fast-moving email threats hours ahead of the market.

MailInBlack

Advanced AI spam and phishing filtering+7

We are a cybersecurity company based in France, whose mission is to protect its customers from cyber attacks.

Mailprotector

Inbound spam and malware filtering+9

Mailprotector designs, builds, and supports products that help organizations secure and optimize email.

Malwation

Real-time Content Disarm and Reconstruction+6

Malwation is a research and development company founded in 2020, specializing in advanced malware analysis solutions. While its core platform focuses on holistic malware analysis rather than dedicated email security gateways, it offers capabilities relevant to email security by automatically downloading and analyzing files fetched from URLs within email attachments to identify malware or malicious content. Malwation is best suited for organizations seeking deep malware inspection for email-delivered threats, particularly those needing to validate file safety before execution. The company does not market itself as a primary email security vendor but provides adjacent malware analysis that supports email threat mitigation.

Material Security

Email SecurityFile Security+2

Material Security secures the productivity suite by stopping attacks and reducing risk across Microsoft 365 and Google Workspace with unified cloud email and file security, data loss prevention and posture management.

Mesh 365

Impersonation Detection+11

3 products

Mesh 365 by Mesh Security is an API-based email security platform that enhances Microsoft 365 with advanced threat detection and response for email-borne attacks. It protects against BEC, phishing, ransomware, supply chain fraud, impersonation, and spoofing using native API integration rather than mailflow or DNS changes. It supports MSP and enterprise use cases with cross-tenant visibility, centralized policy management, global block/allow rules, and one-click multi-tenant remediation. Features include sandboxing, URL protection, warning banners, and monitor-only deployment mode for safe evaluation. It reduces email security workload and improves response efficiency.

Microsoft

Cloud Security / CSPM

15 products

Microsoft Defender for Cloud is a multicloud CSPM platform that provides continuous security posture assessment across Azure, AWS, and GCP. It delivers agentless vulnerability scanning, misconfiguration detection, and compliance monitoring against industry benchmarks (CIS, NIST, ISO, PCI-DSS). The platform generates hardening recommendations ranked by risk and includes attack path analysis to identify exploitable chains. Defender for Cloud serves enterprises managing hybrid and multicloud infrastructure seeking unified posture visibility and compliance reporting.

Agentless vulnerability scanning+21

Mimecast

Inbound and outbound email threat scanning+10

10 products

Mimecast protects the work of every person in the organization, across every channel, from every actor, human and AI.

N-able Mail Assure

Inbound and outbound email securityPattern recognition for phishing and malware+6

N-able Mail Assure is a cloud-based email security gateway for MSPs and Microsoft 365 environments. In scope for email security, it filters inbound and outbound mail, blocks spam and email-borne threats, supports policy-based controls, and provides quarantine, archiving, and continuity functions through a web console. N-able positions it for service providers and IT teams that need centralized protection for multiple domains and tenants, plus message-level visibility and administrative reporting. Adjacent capabilities include a private portal for handling sensitive messages and Microsoft 365 add-ons, but the core product is email gateway protection.

NINJIO Cybersecurity Awareness Training

Narrative cybersecurity awareness episodes+11

NINJIO provides a human risk management platform that utilizes personalized security coaching and story-based awareness training to reduce the likelihood of social engineering attacks. The platform generates an Emotional Susceptibility Profile for users to identify specific psychological triggers and tailor content accordingly. It replaces generic, compliance-only training with behavioral science-driven modules to change organizational security culture.

OPSWAT

Vulnerability Management

Detect and report installed software vulnerabilitiesAutomated patch management for third-party applications

OPSWAT prevents known, unknown, and AI-generated threats from reaching the systems the world depends on. The MetaDefender Platform, OPSWAT's AI-powered cybersecurity solution, secures every file, device, and data transfer across IT, OT, and cross-domain environments.

Paubox

Automatic TLS encryption for all outbound emailsGenerative AI inbound phishing detection+9

Become the market leader for HIPAA compliant email security

Perception Point

AI-powered real-time dynamic scanning+8

FortiMail Workspace Security delivers AI-powered protection for email, browsers, collaboration, and cloud apps across the modern workspace

PhishFirewall

AI-generated phishing simulations customizable by tone, industry, and language to mimic real-world threats

PhishFirewall Analytics is a commercial phishing simulation tool designed to help security teams assess and reduce human cyber risk through realistic, AI-generated attack scenarios. It specializes in customizable simulations by tone, industry, and language, paired with real-time user behavior tracking during campaigns. The platform enables risk-based targeting, automated follow-up training, and detailed analytics tied to human risk reduction. Best suited for mid-to-large organizations seeking to strengthen security awareness without complex deployment, it operates within the broader Human Risk category. While adjacent products may exist, PhishFirewall Analytics is focused exclusively on phishing simulation capabilities.

PIXM

AI computer vision phishing protectionBrowser-native zero-day phishing defense+3

We stop phishing attacks with effortless AI technology

PowerDMARC

DMARC monitoring and analysis+10

At PowerDMARC, we are on a mission to redefine domain and email security, making digital communications safer for organizations and governments around the globe. We are a team of passionate security experts committed to providing cutting-edge domain and email security solutions to safeguard your business's reputation from online threats.

PreVeil

End-to-end encrypted email with zero-knowledge architecture

We started PreVeil to bring radically better security to ordinary business and personal communication and information storage.

Proofpoint

Detect AI-augmented email threatsBlock phishing and business email compromise+10

Proofpoint is a human-centric cybersecurity platform focused on protecting organizations from email-based and identity-driven attacks such as phishing, business email compromise (BEC), and social engineering. It secures inbound and outbound communications using advanced threat detection, AI-driven impersonation analysis, URL and attachment sandboxing, and behavioral risk signals. Beyond email protection, it extends into data loss prevention (DLP), insider threat detection, and security awareness training to reduce human risk across the organization. The platform integrates across email, cloud applications, and collaboration tools to protect sensitive data and stop attacks targeting users.

Proofpoint 365 Total Protection

Automated awareness benchmarking+10

Proofpoint 365 Total Protection is a Microsoft 365 security suite that includes built-in security awareness training and adaptive phishing simulations for user behavior testing. In the security awareness scope, it is positioned around realistic spear-phishing exercises, multilingual phishing tests, and reporting-focused training for Microsoft 365 customers, including MSP-managed environments. It fits buyers that want awareness content tied to Proofpoint threat intelligence and user-risk measurement without adopting a separate standalone awareness platform. Adjacent Microsoft 365 security functions exist in the broader bundle, but are outside this scope.

Proton for Business

Data Loss Prevention (DLP)

End-to-end encrypted business emailZero-access encrypted incoming mailEnd-to-end encrypted calendar events+9

We believe a better world starts with privacy and digital freedom

Retarus Secure Email Platform

Advanced Threat Protection+10

Retarus Secure Email Platform is a cloud-based secure email gateway focused on protecting business email traffic from spam, phishing, malware, BEC, spoofing, and malicious links. It is positioned as a modular email security service for organizations that want gateway-based filtering with data-sovereignty controls and support for complex email infrastructures. Retarus also extends into adjacent areas such as email continuity and transactional email delivery, but its Email Security scope centers on inbound and outbound protection and remediation for enterprise mail environments.

Riot Security

Chat-based awareness training in Slack and TeamsPhishing testing and drills+7

Riot Security is a security awareness and employee security posture management platform focused on reducing human-risk exposures through training, phishing simulations, and employee-facing security nudges. Based on the available product information, it is positioned for companies that want to run ongoing awareness programs for distributed teams rather than one-off training courses. The product appears best suited for small to mid-sized organizations that need Slack- or Teams-based delivery, breach notifications, and phishing exercises as part of a structured awareness program. Adjacent employee posture features are mentioned by the vendor, but the core fit is security awareness.

SalaX

End-to-End Email EncryptionMulti-Method Access Verification+8

SalaX Secure Mail is an email encryption-focused solution within the Email Security category, designed to protect confidential communications through AES-256 encryption and ensure full data sovereignty. The vendor operates primarily as a specialized encryption tool rather than a comprehensive gateway or AI-driven inbox defense platform, making it best suited for organizations with strict data privacy requirements, regulated industries, or those needing to embed secure messaging into existing email services without MX changes. While SalaX offers adjacent secure messaging capabilities for chat and video, its core Email Security role centers on encryption and workflow integration, not threat detection or spam filtering.

Sasa Software

Content Disarm and Reconstruction for email attachments

Sasa Software is a specialized cybersecurity vendor focused on Content Disarm and Reconstruction (CDR) technology, with its GateScanner suite delivering file-based threat protection across email channels. In the Email Security category, the company neutralizes undetectable malware in attachments by dismantling and reconstructing files without relying on signatures or behavioral analysis. Best suited for government, critical infrastructure, financial services, and healthcare organizations requiring defense against zero-day and APT threats, Sasa Software holds a niche position as a CDR pioneer recognized by the Israeli Cyber Command and Frost & Sullivan. While the vendor offers CDR for file exchange and web downloads, its email capability is the primary entry point for buyers evaluating attachment sanitization.

SecurEnds

Identity Governance & Administration (IGA)

Automated identity lifecycle management+11

Govern every identity across your enterprise. Automate user access reviews, enforce least privilege, and simplify compliance.

Sendmarc

DMARC implementation and management+11

At the heart of everything we do, is our purpose of making the Internet a safer place for all.

Skysnag

Automated DMARC enforcement with p=reject policy

Skysnag is a cloud email authentication and domain trust product focused on DMARC enforcement, SPF, DKIM, BIMI, MTA-STS, and TLS-RPT. In the Email Security category, it is positioned around stopping domain spoofing and impersonation while improving authenticated message delivery and brand display in inboxes. It is best suited for organizations that need automated DNS-based email authentication controls without running a large manual DMARC program, especially teams protecting a brand domain and third-party senders. Adjacent capabilities such as domain trust and deliverability are only relevant where they support email authentication.

SlashNext

Generative AI for BEC variant detection+8

SlashNext is an email security vendor focused on stopping phishing, business email compromise, credential theft, and QR-code-based attacks before they reach users. Its cloud email security products use predictive detection techniques rather than relying only on signatures or delayed reputation feeds, and the company has been positioned as a strong specialist in advanced social-engineering defense. It is best suited for organizations that want protection for Microsoft 365 and other enterprise email environments against zero-hour email threats. SlashNext also sells adjacent messaging-security capabilities, but those are outside this profile scope.

Smartlockr

End-to-end email encryption with AES and RSA+8

Smartlockr is a people-centric email security and secure file sharing platform that enables organisations to send and receive sensitive information safely without changing existing workflows. It integrates with standard email environments to secure messages and attachments, helping prevent data leaks and breaches through encryption and policy-based protection. The platform focuses on usability, allowing non-technical users to easily apply strong security controls. Leveraging machine learning and continuous detection capabilities, Smartlockr helps classify and protect sensitive data in transit, reducing the risk of human error while maintaining seamless communication and compliance with data protection requirements.

Sophos

Data Loss Prevention (DLP)

12 products

Sophos defeats cyberattacks with an adaptive AI-native open platform and unmatched security expertise.

Monitor and restrict sensitive file transfers+11

Spambrella

Spam and phishing detection+10

Spambrella is the best email security and continuity solution to strengthen your business reputation, encrypt sensitive data, and meet regulatory requirements. We provide effective email protection services and real-time cyber threat detection while spreading user awareness among stakeholders.

SpamExperts

Incoming Email FilteringOutgoing Email FilteringReal-Time Cloud Filtering+8

Affordable enterprise-grade email security built for web hosts and ISPs

SpamTitan by TitanHQ

Phishing and malicious email blocking+11

SpamTitan by TitanHQ is a cloud-based or on-premises email security gateway that filters inbound and outbound emails, blocking spam, phishing, malware, ransomware, and APTs with a 99.99% spam catch rate and 0.003% false positive rate. It integrates with Office 365, Google Workspace, Active Directory, and LDAP via a web-based admin portal. Designed for MSPs with multitenancy and granular per-domain policies, it serves SMBs, enterprises, and service providers seeking rapid deployment without agents.

Spikerz

Identity & Access Management (IAM)

Protect social media account access+7

Spikerz is the digital marketing security platform built for modern brands, marketing teams, and security leaders.

StealthMail

Replaces standard email content transmission with authenticated 'Stealth-Links' that contain no user information, bypassing SMTP vulnerabilities and preventing intermediaries from accessing message bodies or attachments

Email needs to earn the right to be trusted by millions of people and organizations with their most sensitive information. We see a future where everyone is confident that their private correspondence is genuinely secure.

StrongestLayer

LLM-based intent analysis+10

StrongestLayer is an LLM-native email security platform designed to combat the surge in sophisticated, AI-generated phishing and social engineering attacks. Unlike legacy SEGs that rely on signatures or basic heuristics, it uses deep language modeling to understand intent and context within communications. The platform integrates via API to provide real-time scanning and "in-the-moment" user coaching to improve organizational resilience.

Sublime Security

Autonomous detection coverage creation+8

Sublime Security is the adaptive, AI-powered cloud email security platform that combines best-in-class effectiveness with unprecedented visibility and control. The open platform allows security teams to have transparency and flexibility in their email environment to spend less time on email-originated incidents. Advanced teams can customize detections, threat hunt, extend Sublime into their SIEM or SOAR, and collaborate with other teams.

Threatcop Inc.

AI-powered adaptive phishing simulationMulti-vector attack simulation support+4

Threatcop is focused on keeping your people safe against the evolving cyber threats.

ThreatDown

Endpoint Detection & Response (EDR)

Advanced behavioral threat detection+5

ThreatDown is redefining cybersecurity for businesses of all sizes. We strip away the bloat, the cost, and the confusion, replacing it with powerful, intuitive security that protects thousands of organizations worldwide from the most advanced threats.

Trend Micro

Data Loss Prevention (DLP)

11 products

Trend Micro offers integrated Data Loss Prevention (DLP) functionality embedded within its broader endpoint security and email security platforms. The iDLP module provides lightweight agent-based monitoring across endpoints, email, USB devices, and web channels without requiring dedicated hardware. Trend Micro positions DLP as a cost-effective alternative to standalone enterprise solutions, leveraging pre-built regional and industry-specific policy templates. Best suited for organizations already invested in Trend Micro's endpoint protection or email security infrastructure seeking consolidated data protection without additional management overhead.

Monitor data movements on user devices+11

Trustmi

Fraud Detection & Prevention

Behavioral AI fraud detection+10

Trustmi is an AI-powered business payments security platform designed to eliminate cyber-enabled fraud and Business Email Compromise (BEC). It sits between email communications and financial systems to identify behavioral anomalies in the payment lifecycle, replacing fragmented manual verification processes. The solution provides visibility into the end-to-end money movement process to detect vendor impersonation and unauthorized account changes.

Trustwave MailMarshal

Anti-spam and anti-malware filtering+6

Trustwave MailMarshal is an email security gateway focused on filtering inbound and outbound mail for phishing, malware, spam, ransomware, business email compromise, and data leakage. It is positioned for organizations that want layered controls, policy enforcement, and deployment flexibility across on-premises, cloud, hybrid, and Microsoft 365 environments. Trustwave and LevelBlue describe it as a long-established product used by enterprises, government organizations, and service providers that need centralized email threat filtering and auditability rather than a lightweight inbox add-on.

Upfort

Auto-generation of mock phishing emails with realistic templates to simulate real-life phishing attacks without requiring security specialty skills

Upfort is a security awareness and phishing simulation vendor that enables businesses to launch simulated phishing attacks against their teams with minimal IT involvement, using a few-click interface. Its Cyber University delivers enterprise-scale, interactive, on-demand security training covering modern cyber tactics. The platform auto-generates mock phishing emails mimicking real-life attacks via suspiciously authentic emails, websites, or pop-ups, then captures employee response insights to measure preparedness. Upfort is best suited for small to mid-sized businesses and MSPs seeking fast deployment and automated remediation. While it offers the Upfort Shield multi-layer defense platform, its core strength lies in phishing simulation and awareness training.

Valimail

Automated DMARC enforcement and policy management

Valimail is an email authentication vendor focused on stopping phishing and domain spoofing through automated DMARC enforcement, SPF management, DKIM alignment, and BIMI support. It is positioned as a leader in zero-trust email authentication and is used by enterprises, federal agencies, and fast-growing organizations that need to move domains to DMARC enforcement with limited manual DNS work. In scope for email security, its core value is identity validation for outbound mail and brand protection rather than content inspection or mailbox threat detection. It also offers a free discovery product for visibility into sender usage.

Varonis

Data Security Posture Management (DSPM)

Discover and classify sensitive data+10

Varonis is a data security platform vendor positioned in DSPM for enterprises that need to find, classify, and control sensitive data across cloud, SaaS, and on-premises stores. Within DSPM, it emphasizes data discovery, permission and exposure analysis, sensitive data flow visibility, and automated remediation of risky access paths. Varonis is best suited for security teams managing large, mixed data estates in Microsoft 365, file shares, databases, and cloud object storage. Its broader platform also includes adjacent insider risk and threat detection capabilities, but the DSPM scope centers on data posture and exposure reduction.

Vircom modusCloud

Spam and phishing protectionMulti-layer anti-virus defense+10

Protect more without growing your team. Get leading email security, enhanced by Vircom.

Virtru

Encryption & Key Management

End-to-end email encryption+10

Powered by the Trusted Data Format, Virtru's Data Security Platform, and the products built on top of it, make it easy to share information without sacrificing security, privacy, and control.

Votiro

Real-time file sanitization for emailContent Disarm and Reconstruction for email+6

Secure Your Browsers While Preserving User Choice

YazamTech

Content Disarm and Reconstruction for emails+6

YazamTech Ltd. is a specialized cybersecurity vendor focused on Content Disarm & Reconstruction (CDR) technology, not a dedicated Email Security platform. While their CDR solutions can be applied to sanitize files within email streams to block infected attachments, they do not offer core email security capabilities like spam filtering, phishing detection, BEC prevention, or secure email gateways. The company is best positioned as a data security specialist for organizations needing to neutralize advanced threats in file streams, rather than as an email security buyer's primary solution. Their market position is niche within data sanitization, not email protection.

Zertificon