Proofpoint vs GreatHorn: Email Security Comparison (2026)
An independent side-by-side comparison of Proofpoint and GreatHorn 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 GreatHorn 0% across 60 probes.
ChatGPT
ProofpointLeads
5 / 6 probes
83%
ExcellentGreatHorn
0 / 6 probes
0%
InvisiblePerplexity
ProofpointLeads
4 / 6 probes
67%
ExcellentGreatHorn
0 / 6 probes
0%
InvisibleGemini
ProofpointLeads
5 / 6 probes
83%
ExcellentGreatHorn
0 / 6 probes
0%
InvisibleClaude
ProofpointLeads
5 / 6 probes
83%
ExcellentGreatHorn
0 / 6 probes
0%
InvisibleCopilot
ProofpointLeads
1 / 6 probes
17%
AverageGreatHorn
0 / 6 probes
0%
InvisibleScale:NoneLowFairStrongExcellent
Probes run hourly; each (engine × query) combo retests every ~3 days.
Pricing
Key Features
Proofpoint
Feature data is being indexed.
GreatHorn
Feature data is being indexed.
When to choose Proofpoint
Choose Proofpoint if your team prioritizes its strengths over GreatHorn's. Full guidance populates as Proofpoint's feature data is indexed.
When to choose GreatHorn
Choose GreatHorn if your team prioritizes its strengths over Proofpoint's. Full guidance populates as GreatHorn's feature data is indexed.