Fastest-growing Email & Messaging Security companies, Q3 2026

AegisAI provides an AI-native email security platform designed to prevent phishing and business email compromise (BEC) threats. The company was founded by former Google security leaders who previously built and managed Safe Browsing, reCAPTCHA, and Web Risk—services that protected billions of users worldwide.

The platform uses artificial intelligence to detect and block email-based threats at scale. AegisAI's approach focuses on leveraging AI technology to adapt to rapidly evolving threat landscapes, particularly as adversaries increasingly use AI to craft more sophisticated attacks.

Ocean Security is a cybersecurity company that provides an agentic email security platform designed to detect and prevent email-based attacks before they reach employee inboxes. The platform centers on a core intelligence engine called "Ray," which coordinates a swarm of purpose-built AI agents to investigate emails in real time.

• Infrastructure Agent
• File Agent
• Abuse Mailbox Agent
• Link Agent
• Identity Agent

Abnormal Security provides AI-native email and cloud security solutions that protect against phishing, social engineering, and account takeover attacks. The company was founded in 2018 by former advertising technology professionals who applied their AI expertise to cybersecurity.

The Abnormal Behavior Platform delivers email security for Microsoft 365 and Google Workspace, as well as multi-platform defense for cloud infrastructure and SaaS applications including Workday, Salesforce, ServiceNow, Slack, and Amazon Web Services.

Sublime Security offers an advanced, AI-powered email security platform designed to combat modern threats like phishing and malware. Their solution provides adaptive detection, transparent AI, and automation to enhance efficiency and reduce false positives for security teams.

Guardz provides cybersecurity solutions designed specifically for Managed Service Providers (MSPs) and their small to medium-sized business clients. The platform offers protection against email-based threats including phishing attacks, business email compromise (BEC), and AI-generated social engineering attempts.

The company operates a research unit that tracks and analyzes emerging threats, such as their recent investigation into legacy authentication exploits in Microsoft Entra ID environments.

dPhish is an All-in-One Anti-Phishing Solution that addresses all phases of a phishing attack—pre, during, and post. It offers capabilities ranging from phishing simulation & awareness to phishing detection & response, email gateway assessment, and hunting stolen credentials.

xorlab is a Swiss cybersecurity company that develops email security solutions designed to detect and prevent advanced email-based threats. The company's technology analyzes multiple attributes beyond traditional link and attachment scanning to identify sophisticated phishing campaigns, social engineering attacks, and other email-borne threats.

Trustifi provides a cloud-based email security platform that uses artificial intelligence to protect organizations from email-based threats. The company offers a comprehensive suite of products including inbound email protection with anti-phishing, spam filtering, impersonation detection, and spoofing prevention capabilities.

RealTyme is a Swiss company that develops secure communication solutions built around end-to-end encryption and digital identity protection. Founded in 2007, the company provides a platform for encrypted messaging, calling, and collaboration aimed at governments, businesses, and individual users who require private and compliant communication channels.

The company's offering focuses on data ownership and privacy, allowing organizations to control their communication infrastructure rather than relying on third-party providers.