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Free AI For That

9 Free AI Tools to Review Code & PRS (2026)

The best free AI tools to review code & PRs, ranked by our checks. Last checked 18 Oct 2026.

Ranked AI tools you can use to review code & PRs. Each listing shows verified free-tier details from the vendor pricing page; picks require at least one month of free access (free plan, monthly credits, or a trial of 30+ days).

9 free tools

Each with its last-checked date

  1. GitHub Copilot

    AI pair programmer with chat, completions, and PR assistance in major IDEs.

    Free forever, Copilot Free $0 with monthly usage limits

    AI Coding Assistants
    Try

  2. What The Diff

    AI-generated pull request descriptions.

    Free forever

    AI Coding Assistants
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  3. Freebuff

    Ad-supported free AI coding agent for the terminal, desktop, web and GitHub repos.

    Free forever, Free $0/month plan funded by text ads: free hours refilled daily (30 hours a day shown on the plans page for full access; 5 hours a day in limited mode, 4 on a VPN or proxy)

    AI Coding Assistants
    Try

  4. CodeRabbit

    AI code reviews on pull requests for GitHub, GitLab and more.

    Free forever, PR summaries, free forever for open source

    AI Coding Assistants
    Try

  5. Sourcery

    AI code reviewer for GitHub and GitLab.

    Free forever, Free for open-source projects

    AI Coding Assistants
    Try

  6. Graphite

    Stacked pull requests with AI code review.

    Free forever, Free Hobby plan for personal repos

    AI Coding Assistants
    Try

  7. Codacy

    Code quality and security with AI-assisted fixes.

    Free forever, Free for open source and individual developers

    AI Coding Assistants
    Try

  8. SonarQube Cloud

    Code quality and security analysis with AI CodeFix.

    Free forever, Free for small projects

    AI Coding Assistants
    Try

  9. Amazon Q Developer

    AWS coding assistant with chat, security scans, and Java upgrades.

    Free forever, Limited agentic requests per month

    Closing Apr 2027

    AI Coding Assistants
    Try

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