Perimeter 81 vs Proofpoint: Email Security Comparison (2026)
An independent side-by-side comparison of Perimeter 81 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.
Too early to call — probes still building data.
ChatGPT
Perimeter 81
Tracking…
No data yet
Proofpoint
5 / 6 probes
83%
ExcellentPerplexity
Perimeter 81
Tracking…
No data yet
Proofpoint
5 / 7 probes
71%
ExcellentGemini
Perimeter 81
Tracking…
No data yet
Proofpoint
5 / 6 probes
83%
ExcellentClaude
Perimeter 81
Tracking…
No data yet
Proofpoint
5 / 6 probes
83%
ExcellentCopilot
Perimeter 81
Tracking…
No data yet
Proofpoint
1 / 6 probes
17%
AverageScale:NoneLowFairStrongExcellent
Probes run hourly; each (engine × query) combo retests every ~3 days.
Pricing
Key Features
Perimeter 81
Feature data is being indexed.
Proofpoint
Feature data is being indexed.
When to choose Perimeter 81
Choose Perimeter 81 if your team prioritizes its strengths over Proofpoint's. Full guidance populates as Perimeter 81's feature data is indexed.
When to choose Proofpoint
Choose Proofpoint if your team prioritizes its strengths over Perimeter 81's. Full guidance populates as Proofpoint's feature data is indexed.