Mimecast vs GreatHorn: Email Security Comparison (2026)
An independent side-by-side comparison of Mimecast and GreatHorn for email security buyers — pricing, features, integrations, and how often each is cited by major AI engines.
AI Citation Scorecard
How often each vendor is cited by major AI engines when real buyers ask email security questions. Tracked across ChatGPT, Perplexity, Gemini, and Claude over the last 90 days. Methodology.
Probes run hourly; each (engine × query) combo retests every ~3 days. Fresh categories may show "tracking…" until probes complete.
Pricing
Key Features
Feature data is being indexed.
Feature data is being indexed.
When to choose Mimecast
Choose Mimecast if your team prioritizes its strengths over GreatHorn's. Full guidance populates as Mimecast's feature data is indexed.
When to choose GreatHorn
Choose GreatHorn if your team prioritizes its strengths over Mimecast's. Full guidance populates as GreatHorn's feature data is indexed.