Fact0 vs Sublime Security

Side-by-side comparison of features, pricing, and ratings

Analysis reviewed Live tool data as of 2026-10-18
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At a glance

DimensionFact0Sublime Security
PricingFree tier (30K events/month) + paid plans; Enterprise with SAML/SSO, SCIMPaid only; pricing not public, contact sales
Core Use CaseTamper-evident audit layer for autonomous AI agentsAI-driven email security for BEC/VEC/phishing
Key FeaturesSHA-256 hash chain, Ed25519 signatures, SDKs (Python/TS/Go), OpenTelemetry, agent framework integrationsConversational analysis, YARA-like Sublime Script, threat hunting, Microsoft 365/Google Workspace integration
IntegrationsLangChain, LangGraph, LlamaIndex, CrewAI, OpenAI Agents SDK, Google ADK, etc.Microsoft 365, Google Workspace
Best ForAI startups, regulated industries (fintech, healthcare), compliance officersEnterprise security teams combating advanced email threats
Latest Newsv1.2.2 (June 23, 2026) - observability fixes, dashboard UX improvements; Go SDK v1.0.4 package resolution fix; Python SDK v1.0.5 event_id fixNo recent news
Try Fact0Try Sublime Security
Fact0
Fact0

Open-source agent audit and replay: hash-chained records, signed exports, self-hosted on your own Docker Compose stack.

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Sublime Security
Sublime Security

Agentic email security that auto-triages reported phishing and writes custom detections for your SOC

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Pricing
Freemium
Contact Sales
Plans
$0/mo
$79/mo
Custom
$0
Popularity
4 views
7.5k views
Skill Level
Intermediate
Advanced
API Available
Platforms
WebAPIPlugin
APIWeb
Categories
🛡️ AI Governance & Guardrails🔒 Security & Privacy
🚨 Threat Detection & SOC
Features
Hash-chained audit ledger with integrity checks on stored events
Ed25519 cryptographically signed evidence packs
PDF reports and JSON evidence exports in a ZIP archive
Authenticated share links with token reveal for auditors
Execution DAG visualization and timing waterfall
Step-by-step replay of recorded runs without rerunning the agent
LLM Traces dashboard for inspecting agent runs
PostgreSQL trigger enforcing database-level audit immutability
Capture status reporting (partial / unavailable with reasons)
Python SDK for recording spans, tool calls and audit events
Claude Code plugin for capturing coding sessions
Go SDK for instrumenting agent services
Metadata and hash capture modes to reduce content sent to the API
Self-hosted deployment via Docker Compose (Go API, Next.js dashboard, PostgreSQL)
Owner password login with authenticated ingestion and inspection
Autonomous Security Analyst (ASA) auto-triages user-reported phishing end to end
Autonomous Detection Engineer (ADÉ) authors backtested org-specific detections
One-click approval before any new detection goes live
Custom detections written in Sublime Script, a YARA-like language
Full transparency into every verdict: matched detections and signal analysis
Behavioral threat-hunting interface for proactive investigation
Automated response actions: quarantine, alert and remediation
Detects BEC and vendor email compromise
Detects credential phishing, callback phishing, QR code phishing, ICS phishing
Prompt injection and malware/ransomware detection in email
Email DLP for stopping sensitive data loss over email (GA)
Advanced graymail protection filtering bulk and newsletter noise (public beta, July 2026)
Native deployment over Microsoft 365 and Google Workspace mail
Free email analyzer plus analyzer API for ad-hoc message scans
API for programmatic access to detections and verdicts
Integrations
Claude Code
Microsoft 365
Google Workspace

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 (averaged across 3 sources)

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

20 mentions across 2 sources · 80% positive (weighted across 2 sources)

YouTube, Lemmy

What users praise

  • • Verdicts show matched detections and signal analysis — analysts can read why, not trust a score
  • • Sublime Script is a YARA-like language your engineers can inspect, test, and tune
  • • ASA auto-triages user-reported phishing end to end, cutting the abuse-mailbox backlog
  • • ADÉ authors backtested, environment-specific detections that land ready for one-click approval

What frustrates them

  • • Community footprint is thin — one video thread, and no independent Reddit or HN validation
  • • Vendor efficiency claims (80% faster, 70% fewer FPs) are unverified by third parties
  • • Tuning workload is real and continuous if no one owns the rule library
  • • Not set-and-forget — teams replacing a legacy SEG should expect an operational shift

Researched Oct 14, 2026

Who should pick which

  • AI startup founder needing to close enterprise deals
    Pick: 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 attacks
    Pick: 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 behavior
    Pick: 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 protection
    Pick: 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 traces
    Pick: Fact0

    Fact0's execution DAG replay, OpenTelemetry integration, and SDKs (Python/TS/Go) help developers trace and debug agent actions.

Frequently Asked Questions

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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Explore each tool further

Fact0
View Fact0 reviewFact0 alternatives
Sublime Security
View Sublime Security reviewSublime Security alternatives

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Last reviewed: July 2, 2026