Attic M365 FREE vs OpenPhish: 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. OpenPhish is a free threat intel feeds tool. 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. Security teams responsible for phishing defense but operating without budget for commercial threat intelligence will find OpenPhish's real-time URL feed immediately useful, especially for validating brand-targeting patterns before they hit mailboxes. The platform processes thousands of new phishing URLs daily and integrates easily into existing detection workflows via API. Skip this if your organization needs authenticated intelligence, takedown coordination, or historical context on threat actors; OpenPhish prioritizes volume and speed over investigation depth.
Based on our analysis of NIST CSF 2.0 coverage, core features, integrations, company size fit, here is our conclusion:
