# Free code review for open source software

Greptile supports OSS projects with free code reviews, helping maintainers review contributions and catch bugs before they merge.

[Apply for free reviews](/pricing/open-source)

[See examples](/examples)

For maintainers. For contributors.

## Open source support

- 10,000+ repos supported
- 500,000+ PRs reviewed
- 10,000,000+ total stars

NVIDIA · Tailwind · Metaflow · Axios · Streamlit · Raycast · Cline · PostHog · ClickHouse · LiteLLM · Hoppscotch · RustDesk · Appwrite · Paperclip · ECC · Twenty

## Features maintainers love

### Confidence score

**A Confidence Score on each PR**

Each PR gets a 0–5 confidence score and an explanation of the findings behind it. Get a quick read on where PRs stand before merging.

### Summaries and diagrams

**Understand PRs quickly**

Greptile gives a clear summary and diagram, so you spend less time understanding a PR and more time reviewing it

### Issue severity

**Know where to focus your review**

Greptile ranks issues by severity and flags security issues, helping maintainers focus on changes that deserve further attention.

## Greptile Review on Raycast

Raycast’s WinGet extension · [PR #30324](https://github.com/raycast/extensions/pull/30324)

1. **First pass review — Review 1 · 0/5.** Greptile flagged three P1 issues, including two security findings, in its first review. [See the initial findings](https://github.com/raycast/extensions/pull/30324#pullrequestreview-4963092351).
2. **Close remaining gaps — Review 4 · 3/5.** Author applied the fixes and retriggered Greptile which caught another P1 security finding. [See the security catch](https://github.com/raycast/extensions/pull/30324#discussion_r3806653722).
3. **PR ready to merge — Review 5 · 5/5.** After further fixes, Greptile reported no remaining blockers. A human reviewer then approved the PR. [See reviewer approval](https://github.com/raycast/extensions/pull/30324#pullrequestreview-4967583783).

[ Example reviews ]

## Greptile catches on open source PRs

- **NVIDIA/DALI · GPU:** [Unbalanced CUDA release wipes context](https://github.com/NVIDIA/DALI/pull/6327#discussion_r3168764351)
- **Netflix/metaflow · Security:** [Remote version enables shell injection](https://github.com/Netflix/metaflow/pull/3332#discussion_r3728628846)
- **solana-foundation/kora · Security:** [Lookup tables bypass the fee cap](https://github.com/solana-foundation/kora/pull/638#discussion_r3807253620)
- **PostHog/posthog · Validation:** [Max writes bypass the cell limit](https://github.com/PostHog/posthog/pull/88451#discussion_r3853597120)
- **langfuse/langfuse · Concurrency:** [Cancellation loses race to worker](https://github.com/langfuse/langfuse/pull/15594#discussion_r3677049842)
- **cline/cline · Concurrency:** [Branch reset races with HEAD check](https://github.com/cline/cline/pull/13626#discussion_r3874087670)
- **Infisical/infisical · Security:** [DNS rebinding bypasses SSRF validation](https://github.com/Infisical/infisical/pull/7557#discussion_r3725307946)
- **axios/axios · Resource Leak:** [Final callback blocks settlement](https://github.com/axios/axios/pull/11121#discussion_r3703371806)

[See more examples](/examples)

## Give your project another reviewer

[Apply for free reviews](/pricing/open-source)

## FAQ

### Is Greptile free for open-source projects?

Yes. Greptile provides free AI code reviews for eligible non-commercial open-source projects.

### Which open-source projects qualify for free Greptile reviews?

Public GitHub or GitLab repositories with at least 50 stars and an OSI-approved license can qualify. The repository must be a community project that is not part of a commercial product.

### Which Greptile features are free for open source?

Qualifying repos receive free access to all Greptile features, including AI code reviews, Plus and Apex reviews, and TREX runtime testing.

### How do I apply for Greptile’s open-source program?

Submit your repository URL through the [open-source application](https://www.greptile.com/pricing/open-source). A repository owner or administrator with permission to install apps must complete the application and setup.

### How does Greptile help maintainers review open-source pull requests faster?

Greptile summarizes changes and creates diagrams to make contributions easier to understand. Severity labels highlight important findings, while a 0–5 confidence score gives an overall assessment of each PR.

### Can Greptile detect security vulnerabilities in open-source pull requests?

Yes. Greptile combines static scanning with AI security review to flag potential vulnerabilities, including authorization bypasses and command injection. Findings appear directly in the pull request for maintainers and contributors to review.

### Where can I see examples of Greptile reviewing open-source projects?

Visit [Greptile’s example reviews](https://www.greptile.com/examples) to see findings in public repositories. Each example links to the original pull request so you can inspect the review and surrounding code.