Sentinel
Real-time AI audit for coding agents. Sentinel intercepts your agent's code changes before they're written, validates against your team's standards retrieved from vector memory, and blocks violations automatically. Your agent self-corrects on the spot.
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v
PreToolUse hook fires
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v
Engrm retrieves team standards:
"All auth must use bcrypt, not MD5"
"Never log auth credentials"
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v
Audit LLM reviews diff + standards
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+---> PASS: Agent proceeds
+---> BLOCK: "MD5 detected. Use bcrypt."
Claude fixes and retries automatically
Pre-execution blocking
Catches mistakes before code is written. Exit code 2 blocks the tool call and tells the agent exactly what to fix.
RAG-powered standards
Standards retrieved from vector memory based on what's being changed. Auth code pulls security rules. DB code pulls schema conventions.
Self-improving memory
Every blocked violation is saved back as an observation. Over time, Sentinel learns what your team cares about most.
The gap nobody fills
Existing code review tools work post-PR. Sentinel works pre-execution. There's nothing else like it.
| Sentinel | CodeRabbit | Qodo | Greptile | |
|---|---|---|---|---|
| When it runs | Pre-execution | Post-PR | Post-PR | Post-PR |
| Blocks bad code | ✓ | ✕ | ✕ | ✕ |
| Agent self-corrects | ✓ | ✕ | ✕ | ✕ |
| Persistent memory | ✓ | ✕ | ✕ | ✕ |
| Dynamic RAG standards | ✓ | Static rules | Static rules | Codebase-aware |
| Learns over time | ✓ | ✕ | ✕ | ✕ |
| Price | From $15/mo | $24/seat/mo | $30/seat/mo | $30/seat/mo |
Ships with 5 standard packs
Battle-tested rules ready to go. Add your own team standards on top.
Security
SQL injection, XSS, eval, hardcoded secrets
Auth
Token storage, password hashing, session management
API
Rate limiting, input validation, error handling
React
Hook rules, state patterns, effect cleanup
Database
Parameterized queries, connection pooling, migrations
Bring your own LLM
Sentinel works with any OpenAI-compatible provider. Use cloud or run locally.
Sentinel pricing
Included with Pro and Team plans. Not available on Free.
Vibe
- 50 audits/day
- 5 built-in rule packs
- Bring your own LLM
- 25,000 observations
- 3 devices
- Cloud sync
Pro
- 200 audits/day
- 5 built-in rule packs
- Bring your own LLM
- Dashboard findings feed
- Unlimited observations
- Unlimited devices
Team
- Unlimited audits
- Blocking mode
- Shared standards library
- Dashboard config push
- Audit heatmap & reports
- Unlimited observations
- Team namespace
Sentinel launches in
Pre-execution audit, built-in rule packs, and BYOLLM — all in the launch release.
Early adopters get free accounts for life. No credit card required.