Perimeter 81 vs Tessian: Email Security Comparison (2026)
An independent side-by-side comparison of Perimeter 81 and Tessian 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
Tessian
0 / 6 probes
0%
InvisiblePerplexity
Perimeter 81
Tracking…
No data yet
Tessian
1 / 7 probes
14%
Below averageGemini
Perimeter 81
Tracking…
No data yet
Tessian
0 / 6 probes
0%
InvisibleClaude
Perimeter 81
Tracking…
No data yet
Tessian
2 / 6 probes
33%
GoodCopilot
Perimeter 81
Tracking…
No data yet
Tessian
0 / 6 probes
0%
InvisibleScale:NoneLowFairStrongExcellent
Probes run hourly; each (engine × query) combo retests every ~3 days.
Pricing
Key Features
Perimeter 81
Feature data is being indexed.
Tessian
- ✓AI-powered email threat detection
- ✓Prevent data loss over email
- ✓Integrated email security solutions
- ✓Streamline security analyst workflows
When to choose Perimeter 81
Choose Perimeter 81 if your team prioritizes its strengths over Tessian's. Full guidance populates as Perimeter 81's feature data is indexed.
When to choose Tessian
Choose Tessian if your team prioritizes its strengths over Perimeter 81's. Full guidance populates as Tessian's feature data is indexed.