Mimecast vs Proofpoint: Email Security Comparison (2026)
An independent side-by-side comparison of Mimecast and Proofpoint 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.
Proofpoint leads overall — 67% cited vs Mimecast 60% across 60 probes.
ChatGPT
MimecastLeads
6 / 6 probes
100%
ExcellentProofpoint
5 / 6 probes
83%
ExcellentPerplexity
MimecastLeads
5 / 6 probes
83%
ExcellentProofpoint
4 / 6 probes
67%
ExcellentGemini
Mimecast
0 / 6 probes
0%
InvisibleProofpointLeads
5 / 6 probes
83%
ExcellentClaude
MimecastLeads
6 / 6 probes
100%
ExcellentProofpoint
5 / 6 probes
83%
ExcellentCopilot
Mimecast
1 / 6 probes
17%
AverageProofpoint
1 / 6 probes
17%
AverageScale:NoneLowFairStrongExcellent
Probes run hourly; each (engine × query) combo retests every ~3 days.
Pricing
Key Features
Mimecast
Feature data is being indexed.
Proofpoint
Feature data is being indexed.
When to choose Mimecast
Choose Mimecast if your team prioritizes its strengths over Proofpoint's. Full guidance populates as Mimecast's feature data is indexed.
When to choose Proofpoint
Choose Proofpoint if your team prioritizes its strengths over Mimecast's. Full guidance populates as Proofpoint's feature data is indexed.