Attic M365 FREE vs Island The Enterprise Browser: Side-by-Side Comparison (2026)

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 security teams managing distributed workforces need Island The Enterprise Browser when browser-based data leakage is your actual loss vector, not a theoretical one. It embeds access control and DLP directly into the browser itself rather than bolting them on behind a proxy, which means you catch exfiltration at the point of action; the platform covers NIST PR.AA, PR.DS, and PR.PS simultaneously, a rare combination in this category. Skip this if your org needs visibility into non-browser traffic or if you're looking for a detection-heavy tool rather than a prevention-first approach.

Based on our analysis of core features, integrations, company size fit, deployment model, here is our conclusion: