Best Email Security Tools

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

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

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

Our AI-native culture drives continuous reinvention and bold innovation.

AppRiver is an email security vendor now operating under OpenText Cybersecurity after its acquisition by Zix and then OpenText.

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,

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

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.

Cisco Umbrella is a cloud-delivered DNS-layer and network security platform providing Secure Internet Access, Security Service Edge (SSE), and Cloud Access Security Broker (CASB) capabilities for hybrid workforces.

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.

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.

Smarter Phishing Defense. Stronger Human Security.

Command Zero is the autonomous and AI-assisted SOC platform built for complex enterprise environments.

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.

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, 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.

At Cynet, we imagine a world where any company can have full cybersecurity protections.

Darktrace is a network detection and response vendor centered on self-learning behavioral analytics for north-south and east-west traffic.

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

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

Echoworx provides an integrated infrastructure layer that replaces rigid encryption point products.

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 Mail Security provides multilayered protection for Microsoft Exchange servers, scanning mailboxes, public folders, and hybrid Microsoft 365 environments.

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.

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 is a cybersecurity company that enables organisations to operate securely, safeguarding their data and networks with intelligent file protection.

Graphus is a cloud email security product focused on Microsoft 365 and Google Workspace tenants.

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

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.

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.

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.

IRONSCALES is an AI-driven email security platform designed to detect and remediate advanced phishing, Business Email Compromise (BEC), and account takeover (ATO) attacks.

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

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.

Empowering safer connections in an open world.

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

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

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

Malwation is a research and development company founded in 2020, specializing in advanced malware analysis solutions.

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 by Mesh Security is an API-based email security platform that enhances Microsoft 365 with advanced threat detection and response for email-borne attacks.

Microsoft Defender for Cloud is a unified cloud security platform that provides cloud security posture management (CSPM), cloud workload protection, DevOps security, and AI workload protection across hybrid and multicloud environments including Azure, AWS, and on-premises infrastructure.

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

N-able Mail Assure is a cloud-based email security gateway for MSPs and Microsoft 365 environments.

Ocean Security is an agentic email security platform that uses AI agents to investigate emails in depth and stop targeted attacks that traditional detection-based tools miss.

OpenText Core EDR provides endpoint detection and response integrated with SIEM, SOAR, and vulnerability assessment in a single cloud platform.

OPSWAT prevents known, unknown, and AI-generated threats from reaching the systems the world depends on.

Become the market leader for HIPAA compliant email security

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

We stop phishing attacks with effortless AI technology

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

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.

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.

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.

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.

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.

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

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

Skysnag is a cloud email authentication and domain trust product focused on DMARC enforcement, SPF, DKIM, BIMI, MTA-STS, and TLS-RPT.

SlashNext is an email security vendor focused on stopping phishing, business email compromise, credential theft, and QR-code-based attacks before they reach users.

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.

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

Spambrella is the best email security and continuity solution to strengthen your business reputation, encrypt sensitive data, and meet regulatory requirements.

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

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

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

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 is an LLM-native email security platform designed to combat the surge in sophisticated, AI-generated phishing and social engineering attacks.

Sublime Security is the adaptive, AI-powered cloud email security platform that combines best-in-class effectiveness with unprecedented visibility and control.

SucuriLabs is an email security product that protects Microsoft 365 environments from business email compromise, vendor impersonation, invoice fraud, and payment-change attacks. It analyzes email behavior, supplier trust signals, and financial-risk context, and gives IT and finance evidence to quarantine, release, or escalate a message.

Tessian was a human-layer email security vendor that used machine learning to stop data loss, BEC, phishing, and accidental disclosure in email workflows.

ThreatDown is redefining cybersecurity for businesses of all sizes.

Trend Micro offers integrated Data Loss Prevention (DLP) functionality embedded within its broader endpoint security and email security platforms.

Trustmi is an AI-powered business payments security platform designed to eliminate cyber-enabled fraud and Business Email Compromise (BEC).

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.

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.

Valimail is an email authentication vendor focused on stopping phishing and domain spoofing through automated DMARC enforcement, SPF management, DKIM alignment, and BIMI support.

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.

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

Secure Your Browsers While Preserving User Choice

YazamTech Ltd. is a specialized cybersecurity vendor focused on Content Disarm & Reconstruction (CDR) technology, not a dedicated Email Security platform.

Zertificon Solutions, a Germany-based vendor founded in 2004, specializes in email encryption through its Z1 SecureMail Gateway, a server-based gateway for encrypting and signing email traffic using S/MIME and PGP standards.