Attic M365 FREE vs Halon: Side-by-Side Comparison (2026)
Features, pricing, ratings, and pros and cons, compared head to head.
Attic M365 FREE is a commercial anti-phishing tool by Attic Security. Halon is a commercial email security platforms tool by Halon. Compare features, ratings, integrations, and community reviews side by side to find the best anti-phishing fit for your security stack. Independent and vendor-neutral: our scores and rankings are earned, never bought — sponsored placement is always labeled.
CST VerdictShort answer
Startup and SMB security teams protecting Microsoft 365 will benefit most from Attic M365 FREE because it stops AiTM phishing attacks that bypass MFA, the attack class traditional email filters miss entirely. The tool deploys in five minutes with no payment required, making it immediately useful for resource-constrained teams, and its real-time detection of fake login pages covers both NIST PR.AA and DE.CM functions simultaneously. Skip this if your organization needs protection beyond Microsoft 365 or runs a heterogeneous SaaS stack; Attic is deliberately focused on one platform and one threat vector. Mid-market and enterprise teams handling high-volume email traffic will get the most from Halon because its Kubernetes-native architecture scales without the operational drag of legacy MTAs; the Ultra IO and Cloud Path features handle peak throughput that would choke traditional deployments. The platform scores across NIST Detect, Protect Data, Protect Platform, and Resilience, reflecting genuine depth in threat detection, delivery reliability, and infrastructure redundancy. Skip this if you need a lightweight, managed SaaS email filter with minimal operational overhead; Halon demands engineering resources to extract value from its DSL customization engine and assumes your team wants to own the email stack rather than outsource it.
