GreatHorn vs Mimecast: Email Security Comparison (2026)
An independent side-by-side comparison of GreatHorn and Mimecast for email security buyers — pricing, features, integrations, and how often each is cited by major AI engines.
AI Citation Scorecard
How often each is cited by major AI engines when buyers ask email security questions. Last 90 days across ChatGPT, Perplexity, Gemini, Claude, and Copilot.
Mimecast leads overall — 60% cited vs GreatHorn 0% across 60 probes.
ChatGPT
GreatHorn
0 / 6 probes
0%
InvisibleMimecastLeads
6 / 6 probes
100%
ExcellentPerplexity
GreatHorn
0 / 6 probes
0%
InvisibleMimecastLeads
5 / 6 probes
83%
ExcellentGemini
GreatHorn
0 / 6 probes
0%
InvisibleMimecast
0 / 6 probes
0%
InvisibleClaude
GreatHorn
0 / 6 probes
0%
InvisibleMimecastLeads
6 / 6 probes
100%
ExcellentCopilot
GreatHorn
0 / 6 probes
0%
InvisibleMimecastLeads
1 / 6 probes
17%
AverageScale:NoneLowFairStrongExcellent
Probes run hourly; each (engine × query) combo retests every ~3 days.
Pricing
Key Features
GreatHorn
Feature data is being indexed.
Mimecast
Feature data is being 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.
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.