GreatHorn vs Tessian: Email Security Comparison (2026)
An independent side-by-side comparison of GreatHorn 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.
Tessian leads overall — 10% cited vs GreatHorn 0% across 60 probes.
ChatGPT
GreatHorn
0 / 6 probes
0%
InvisibleTessian
0 / 6 probes
0%
InvisiblePerplexity
GreatHorn
0 / 6 probes
0%
InvisibleTessianLeads
1 / 6 probes
17%
AverageGemini
GreatHorn
0 / 6 probes
0%
InvisibleTessian
0 / 6 probes
0%
InvisibleClaude
GreatHorn
0 / 6 probes
0%
InvisibleTessianLeads
2 / 6 probes
33%
GoodCopilot
GreatHorn
0 / 6 probes
0%
InvisibleTessian
0 / 6 probes
0%
InvisibleScale:NoneLowFairStrongExcellent
Probes run hourly; each (engine × query) combo retests every ~3 days.
Pricing
Key Features
GreatHorn
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 GreatHorn
Choose GreatHorn if your team prioritizes its strengths over Tessian's. Full guidance populates as GreatHorn's feature data is indexed.
When to choose Tessian
Choose Tessian if your team prioritizes its strengths over GreatHorn's. Full guidance populates as Tessian's feature data is indexed.