Fact0 vs Sublime Security
Side-by-side comparison of features, pricing, and ratings
At a glance
| Dimension | Fact0 | Sublime Security |
|---|---|---|
| Pricing | Free tier (30K events/month) + paid plans; Enterprise with SAML/SSO, SCIM | Paid only; pricing not public, contact sales |
| Core Use Case | Tamper-evident audit layer for autonomous AI agents | AI-driven email security for BEC/VEC/phishing |
| Key Features | SHA-256 hash chain, Ed25519 signatures, SDKs (Python/TS/Go), OpenTelemetry, agent framework integrations | Conversational analysis, YARA-like Sublime Script, threat hunting, Microsoft 365/Google Workspace integration |
| Integrations | LangChain, LangGraph, LlamaIndex, CrewAI, OpenAI Agents SDK, Google ADK, etc. | Microsoft 365, Google Workspace |
| Best For | AI startups, regulated industries (fintech, healthcare), compliance officers | Enterprise security teams combating advanced email threats |
| Latest News | v1.2.2 (June 23, 2026) - observability fixes, dashboard UX improvements; Go SDK v1.0.4 package resolution fix; Python SDK v1.0.5 event_id fix | No recent news |
Choose Fact0 if you need cryptographically verifiable audit trails for AI agents to pass enterprise security reviews, especially in regulated industries. Choose Sublime Security if you're an enterprise security team defending against advanced email threats like BEC/VEC with custom detection and low false positives. They serve entirely different domains.
What real users say: Fact0 vs Sublime Security
Not marketing copy and not our opinion — a structured sweep of public discussion (reviews, forums, communities and video comments), showing what people praise and what they complain about for each tool.
Fact0
28 mentions across 3 sources · 37% positive — critical
YouTube, Product Hunt, Bluesky
What users praise
- • Hash-chained ledger with SHA-256 and Ed25519 cryptography provides tamper-evident logs.
- • Supports multiple SDKs (Python, TypeScript, Go) for flexibility.
- • Natively integrates with OpenTelemetry, LangChain, LangGraph, and FastAPI.
- • Generates signed evidence packs (PDF/JSON) and read-only auditor share links.
What frustrates them
- • Zero real user feedback — cannot verify reliability or ease of use.
- • Only 18 Product Hunt upvotes, no organic community buzz anywhere.
- • Off-topic YouTube and Bluesky posts waste scraping effort.
- • No reviews from Reddit, HN, GitHub, or App Store to trust.
Researched Jul 4, 2026
Sublime Security
28 mentions across 2 sources · 35% positive — critical
YouTube, Lemmy
What users praise
- • Full transparency with evidence-backed verdicts, real differentiator.
- • Custom detections in Sublime Script, powerful YARA-like language.
- • Autonomous agents triage, reducing analyst workload.
- • Integrates natively with Microsoft 365 and Google Workspace.
What frustrates them
- • Nearly no independent community feedback yet, unproven claims.
- • Steep learning curve, advanced skills required for Sublime Script.
- • Pricing opaque, no self-serve tiers, contact-only.
- • Graymail protection still beta, not fully tested.
Researched Aug 26, 2026
Who should pick which
- AI startup founder needing to close enterprise dealsPick: Fact0
Fact0 provides tamper-evident audit logs with SHA-256 chain and Ed25519 signatures, essential for proving compliance and passing enterprise security reviews.
- Enterprise SOC analyst combating BEC attacksPick: Sublime Security
Sublime Security specializes in AI-driven BEC/VEC detection with low false positives, integrates with M365/Google Workspace, and offers custom detection rules.
- Fintech compliance officer verifying agent behaviorPick: Fact0
Fact0's immutable ledger and auditor share links provide verifiable evidence of agent actions, meeting regulatory requirements in fintech.
- IT manager in a mid-sized company needing email threat protectionPick: Sublime Security
Sublime offers real-time detection and automated response for advanced email threats, suitable for organizations without dedicated security teams.
- AI agent developer debugging execution tracesPick: Fact0
Fact0's execution DAG replay, OpenTelemetry integration, and SDKs (Python/TS/Go) help developers trace and debug agent actions.
Frequently Asked Questions
Fact0 vs Sublime Security: which should you choose?
Choose Fact0 if you need cryptographically verifiable audit trails for AI agents to pass enterprise security reviews, especially in regulated industries. Choose Sublime Security if you're an enterprise security team defending against advanced email threats like BEC/VEC with custom detection and low false positives. They serve entirely different domains.
Can Fact0 be used for email security?
No, Fact0 is designed for auditing AI agent actions, not email security. For email threats, Sublime Security is appropriate.
Does Sublime Security offer any free tier?
No, Sublime Security is paid only with contact-based pricing, no free tier.
What integrations does Fact0 support?
Fact0 integrates with LangChain, LangGraph, LlamaIndex, CrewAI, AutoGen, OpenAI Agents SDK, Google ADK, and others, plus OpenTelemetry.
Can Sublime Security detect AI agent misuse?
No, Sublime focuses on email threats (BEC/VEC/phishing), not AI agent audit.
Does Fact0 provide real-time alerts?
Yes, Fact0 offers real-time webhook alerts for audit events.
Does Sublime Security support custom detection rules?
Yes, via Sublime Script, a YARA-like language for custom email threat detection.
Which tool is better for compliance in regulated industries?
Fact0, with its tamper-evident hash chain and cryptographic signatures, is built for compliance and audit trails.
Can I self-host Fact0?
No, Fact0 does not offer a self-hosted free tier; it's cloud-based.
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Last reviewed: July 2, 2026