DiffGuardianKnow Your CodeNever merge AI code
you don't understand.
Your agents ship 5,000-line pull requests before lunch. DiffGuardian reads each one against your entire codebase, breaks it into the features it actually ships, and walks you through them — so you keep human oversight of what merges without becoming the bottleneck.
It traces the PR, one feature at a time
Hit Trace It! and a 5,000-line PR becomes a guided tour — broken into the features it actually ships, each explained in plain English. You approve having seen the whole thing, not skimmed a diff.
See it explain your whole codebaseBring your own keys.
Or never leave your laptop.
Every feature flows through one router: Anthropic → OpenAI → Ollama → LM Studio. Pick a model per job — a cheap fast model for hunk insights, a premium one for the full review, a local one for chat — and ground any of them in a private knowledge base of your team's style guide and RFCs.
- BYOK for Anthropic and OpenAI — you pay the provider, no markup
- Ollama, LM Studio and any OpenAI-compatible endpoint out of the box
- Local vector knowledge bases — embeddings never leave your machine
- Reviews cite your team's RFCs, not the model's training data
- All credentials live in your OS keychain, encrypted at rest
Ask anything about the whole codebase.
DiffGuardian indexes your entire repo into a code knowledge graph. Ask a question in plain English — how auth works, where a payment is verified, what a service touches — and it explains the answer in a way that actually makes sense, then backs it with a diagram drawn from the actual call graph.
Every request carries a session key. The API resolves the real token from the vault, injects the provider's auth header, then makes the call — so the client never touches a raw secret.
Auth flow · view on canvas- 01Ask in plain EnglishAny question about any corner of the repo — not just the lines in the diff.
- 02Explained so it makes senseClear answers grounded in your actual code, with the real files cited.
- 03Backed by a visual aidThe knowledge graph draws the flow as a diagram you can actually follow.
Free to start. Upgrade for the full AI suite.
Every plan reviews locally. The cloud models, knowledge bases and Trace It unlock on Pro.
Forever. No card required.
Download- 1 connected public repo
- 5 AI reviews per month
- Locally-hosted models only
- AI reviews & summaries
- Dependency graphs
- Stack maps
Or $80 a year — two months free.
Get Pro- Everything in Basic
- Unlimited repositories and AI reviews
- Cloud providers with your own keys — Anthropic, OpenAI
- Trace It, Ask, Explain and Polish
- Analyze Project, knowledge bases and RAG
- MCP connections and the DiffGuardian MCP server
- Voice mode
Same price per seat, 5 seat minimum. Or $80 a seat a year.
Manage team seats- Everything in Pro, for everyone
- Centralised seat billing for the whole team
- Seat management and invoicing
- Minimum of 5 seats
Set up by an organisation admin, who buys the seats for the team. Everyone else just downloads the app — individual sign-in happens inside DiffGuardian during onboarding, never here.
Every feature, side by side.
| Features | BasicFree | Pro$8/mo | Team$8/seat/mo |
|---|---|---|---|
| Repositories & limits | |||
| Connected repositories | 1, public only | Unlimited | Unlimited |
| AI reviews | 5 / month | Unlimited | Unlimited |
| Models | |||
| Locally-hosted models (Ollama, LM Studio) | |||
| Cloud providers with your own keys (Anthropic, OpenAI) | – | ||
| Review & understanding | |||
| AI reviews & summaries | |||
| Dependency graphs | |||
| Stack maps | |||
| Trace It — guided walkthrough of a diff | – | ||
| Ask — question your project and PRs | – | ||
| Explain & Polish | – | ||
| Analyze Project | – | ||
| Knowledge bases & RAG | – | ||
| MCP connections & MCP server | – | ||
| Voice mode | – | ||
| Teams | |||
| Centralised seat billing | – | – | 5 seat minimum |