Best AI Code Review Tools for Solo Developers (2026)

Verdict: If you already pay for GitHub Copilot Pro ($10/mo), turn on Copilot code review first, because it is included and costs you nothing extra until your AI credits run out. If you want $0 on a private repo, use Greptile's free Starter plan (50 credits a month for 1 active developer). Pay for a dedicated reviewer such as CodeRabbit or Greptile Pro only when you open PRs every day across several repos and want the tool to learn your codebase.

Every price and limit below comes from the vendor's own pricing page or docs, checked on 13 Nov 2026. The advice in between is ours and is marked as such.

TL;DR#

• Already on Copilot Pro? Code review is included in Pro, Pro+ and Max, not Free. GitHub estimates an average review at about $0.25 of AI credits on Lite and $1.50 on Balanced (GitHub Docs).
• Want $0 on a private repo? Greptile Starter is free with 50 credits a month for 1 active developer; a Base review costs 1 credit (Greptile pricing).
• Open source? CodeRabbit gives "free reviews forever for public repositories" (CodeRabbit pricing) and Sourcery's Open Source plan is free for public repos (Sourcery pricing).
• Bring your own key: PR-Agent is MIT-licensed and community-maintained (GitHub). The Claude Code GitHub Action runs in your CI and bills API tokens or your Claude subscription (Claude Code docs).
• Do not drop human review. AI reviewers work from the diff and nearby code. They cannot know what your product is supposed to do.

Disclosure: ZeroRaised publishes this guide and is a launch site for bootstrapped products. ZeroRaised has no commercial relationship with any vendor named here and earns nothing if you sign up. Facts come from the linked sources as checked on 13 Nov 2026.

What this guide covers (and what it does not)#

This is a buyer's guide to hosted and self-run AI pull request reviewers: bots that read a PR and leave comments. It is written for a solo developer or a team of two to five.

It is not a checklist for reviewing AI-written code yourself. That lives in our guide on how to review AI-generated code, and the security side is in the vibe-coded app security checklist. If you are still choosing the editor that writes the code, start with Claude Code vs Cursor for solo founders.

Comparison table#

Prices are for one developer, as listed on each vendor's page today. "Self-host" means you can run the reviewer on your own infrastructure.

Two well-known options are not in the table. OpenAI Codex reviews PRs when you comment @codex review or turn on automatic reviews, and its docs say it "flags only P0 and P1 issues" (Codex GitHub docs). Codex is included in ChatGPT Free, Go, Plus, Pro, Business and Enterprise (Codex pricing), but neither page we checked says how code review counts against those plans. Gemini Code Assist on GitHub is now documented as set up through Google Cloud with a billing account, is labelled Preview, and has a quota of "at least 100 pull request reviews per day" per installation (Google Cloud quotas). We could not find a price or a free consumer tier on Google's pages today, so we left it out.

The tools, one by one#

CodeRabbit: the most complete dedicated reviewer#

CodeRabbit's paid plans are per developer: Essentials $24/user/mo billed yearly ($30 monthly), Team $48 ($60), Advanced $72 ($90) (CodeRabbit pricing). Essentials includes PR review, CLI and IDE reviews, chat, learnings and 1-click fixes, but covers 1 linked repository and 5 PR reviews per developer per hour. Team raises that to 5 repositories. Past your hourly allowance, usage-based reviews cost $0.25 per reviewed file, with admin-set caps.

The free plan is more limited than it first looks. CodeRabbit's plan docs say Free covers unlimited public and private repos but offers "PR summarization only; code reviews are available through the VS Code extension and CLI" (CodeRabbit plans). Open source projects get Team features free. New organisations start with a 14-day Advanced trial.

Our read: CodeRabbit is the strongest pick if you want one tool that reviews PRs, learns from your replies and lets you chat in the thread. The 1-repo limit on Essentials is the catch for a solo founder with an app, a marketing site and an API in separate repos.

Greptile: free for one developer, then pay per review#

Greptile moved to credits. Starter is free with 50 credits a month for 1 active developer and unlimited repositories. Pro is "$1/credit", prepaid and shared, with "Unlimited developers and agents, no seat fees" and a 14-day trial. A Base review costs 1 credit, a Plus review 3 and an Apex review 10 (Greptile pricing). Pre-Series A startups with under $2M revenue in the last 12 months get 500 credits a month for 6 months, and qualified non-commercial OSI-licensed projects can apply for free use.

Our read: per-review pricing suits solo developers well, because you pay for the PRs you actually open, not for a seat you use twice a week. Treat any vendor-run benchmark you see as marketing until you test the tool on your own PRs.

GitHub Copilot code review: the one you may already pay for#

Automatic Copilot code review is "available on the Copilot Pro, Copilot Pro+, and Copilot Max plans" and with Business or Enterprise licences, while Copilot Free "does not include Copilot code review" (GitHub Docs). Pro is $10/mo with $15 of AI credits, Pro+ $39/mo with $70, Max $100/mo with $200, where 1 AI credit is $0.01 (Copilot plans).

GitHub estimates "a review costs an estimated $0.25 USD with Lite, $1.50 USD with Balanced, and $10 USD with Max." It reviews a PR once unless you configure it to review each push, and it skips dependency files, logs and SVGs.

Illustrative example: if you spent all of Copilot Pro's $15 of credits on Lite reviews at the average $0.25, that is about 60 reviews a month. In practice your chat and agent use draws on the same credits, so expect fewer.

Cursor Bugbot: good if you live in Cursor#

Bugbot has no separate subscription. Its page says it is "usage-based on Individual and Teams plans" and the average review costs $1.00 to $1.50, depending on PR size and complexity (Cursor Bugbot). Cursor's pricing table marks "AI code reviews via Bugbot" as not included on Free or Plus ($8/mo) and included from Premium ($30/mo) up (Cursor pricing). It supports GitHub, GitLab, Bitbucket and Azure DevOps, and you trigger it with a cursor review or bugbot run comment (Bugbot docs). For a wider view of the editor, see our Cursor alternatives for indie developers.

Graphite, Qodo and Sourcery#

• Graphite has a free Hobby plan with "Limited AI Reviews" on personal account repos, Starter at $20/user/mo and Team at $40/user/mo with unlimited AI reviews, both billed yearly. It names GitHub only (Graphite pricing). Worth it if you already use stacked PRs.
• Qodo charges $0.015 per credit, pooled across the team. Pro Team starts at $30 for 2,000 credits, which Qodo estimates at about 14 reviews a month, and unused credits expire monthly (Qodo pricing). Our read: that is expensive per review for one person.
• Sourcery Pro is $12/developer/mo billed yearly ($15 monthly) for private repos, with a free plan for public repos and a 14-day trial; it reviews on GitHub and GitLab (Sourcery pricing).

PR-Agent and the Claude Code GitHub Action: bring your own model#

PR-Agent describes itself as "an open-source, AI-powered code review agent and a community-maintained legacy project of Qodo". Qodo donated it to the community and it is MIT-licensed (PR-Agent on GitHub). It runs as a GitHub Action, CLI, Docker container or webhook server, works with OpenAI, Claude, Gemini and other models through LiteLLM, and the README says each command "uses a single LLM call (~30 seconds, low cost)."

The Claude Code GitHub Action runs Claude Code inside your own workflows. Cost is two things: GitHub Actions minutes and API tokens, or your Claude subscription if you authenticate with an OAuth token (Claude Code docs). Anthropic's separate managed Code Review product is for Team and Enterprise plans only and bills on token usage through usage credits, with no flat per-review price (Code Review, costs). For a solo developer, the Action is the relevant option.

The cheapest setup for a solo developer#

This is our recommendation, built on the prices above.

Our read: run the free or already-paid option for a month and count the comments you acted on. Pay for a dedicated tool only if that number is high.

Step by step: set up the Claude Code GitHub Action for PR review#

We picked this one because it runs in your own CI, works with an API key or an existing Claude subscription, and every step is documented on the official page (Claude Code GitHub Actions).

1. Install prerequisites. Install the GitHub CLI and run gh auth login. You need admin access to the repository. Quick setup only works with github.com repositories.
2. Run the installer. Open claude in your repo and run /install-github-app. It installs the Claude GitHub App, then asks how to authenticate.
3. Pick a credential. Use an API key from the Claude Console (saved as the ANTHROPIC_API_KEY secret) or a subscription token from claude setup-token (saved as CLAUDE_CODE_OAUTH_TOKEN). The docs say the OAuth token works on Pro, Max, Ultra, Team and Enterprise plans.
4. Select the review workflow when prompted. Claude Code pushes a branch with the workflow files and opens a PR. Merge it.
5. Or set it up by hand. Add .github/workflows/claude-code-review.yml with the documented review workflow:

name: Code Review
on:
  pull_request:
    types: [opened, synchronize, ready_for_review, reopened]
jobs:
  review:
    runs-on: ubuntu-latest
    permissions:
      contents: read
      pull-requests: read
      issues: read
      id-token: write
    steps:
      - uses: actions/checkout@v6
        with:
          fetch-depth: 1
      - uses: anthropics/claude-code-action@v1
        with:
          anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}
          plugin_marketplaces: "https://github.com/anthropics/claude-plugins-official.git"
          plugins: "code-review@claude-plugins-official"
          prompt: "/code-review:code-review --comment ${{ github.repository }}/pull/${{ github.event.pull_request.number }}"
          claude_args: '--allowedTools "mcp__github_inline_comment__create_inline_comment"'

6. Write a short CLAUDE.md in the repo root with your review criteria. The docs advise keeping it concise "since Claude reads it on every run."
7. Cap the cost. Add --max-turns to claude_args, set a workflow timeout-minutes, and use GitHub concurrency controls, all of which the docs recommend.
8. Open a test PR. Claude posts inline comments, or one summary comment if it finds nothing. It skips drafts, closed PRs and PRs it already commented on. On public repos, GitHub withholds secrets from fork PRs, so reviews only run on branches in your own repo.

Our read: dropping synchronize from the trigger list means one review per PR instead of one per push.

How to cut the noise#

A wall of style nitpicks teaches you to ignore the bot. Every tool has a dial for it.

• CodeRabbit: add .coderabbit.yaml at the repo root. reviews.profile accepts quiet, chill (the default) or assertive; the docs say assertive "may feel nitpicky." Use reviews.path_filters with ! to exclude paths and reviews.path_instructions for per-folder guidance (configuration reference):

reviews:
  profile: "quiet"
  auto_review:
    enabled: true
    drafts: false
  path_filters:
    - "!**/generated/**"
    - "!**/*.lock"
  path_instructions:
    - path: "src/api/**"
      instructions: |
        Focus on authentication, authorization and input validation.

• Copilot: put repo-wide rules in .github/copilot-instructions.md, path rules in .github/instructions/*.instructions.md, or shared rules in AGENTS.md (GitHub Docs). Leave "Review new pushes" off in the ruleset if one review per PR is enough (automatic review setup).
• Bugbot: use .cursor/BUGBOT.md for review context; it ignores files marked linguist-generated in .gitattributes. Cursor's .cursor/rules/ files "do not apply to Bugbot runs" (Bugbot docs).
• Codex: add a ## Code Review Rules section to the nearest AGENTS.md; OpenAI suggests starting with two or three concise rules.
• Gemini Code Assist: .gemini/config.yaml supports ignore_patterns and code_review: comment_severity_threshold (default MEDIUM), plus a styleguide.md (Google Cloud docs).
• Claude: keep CLAUDE.md short and specific, and list what not to flag.

Our read: whichever tool you use, write three rules, not thirty. "Flag missing auth checks on API routes", "flag money stored as floats", "ignore formatting, the linter handles it" does more than a page of style preferences. Also exclude lockfiles, generated clients, migration snapshots and vendored code.

What AI review misses#

AI reviewers are a useful first pass, and the vendors themselves say they are not the last one. Anthropic's docs say "A review with no findings doesn't mean your code is error-free or secure" and that Code Review works "without building or running your code" (Claude Code Review). OpenAI says review rules "don't replace tests, branch protections, or required approvals" (Codex docs).

Our read: the gaps fall into a few groups.

• Intent. The bot does not know that free users should not see the export button, or that refunds over 30 days need a manual check. Business rules live in your head and your tickets, not the diff.
• What is not in the PR. A missing migration, a webhook you forgot to register, an environment variable that only exists in production.
• Runtime behaviour. Most reviewers read code; they do not click through your app, load-test a query or watch a race condition happen.
• Excluded files. Copilot skips dependency files; Bugbot skips oversize PRs and generated files. A vulnerable dependency bump may get no comment at all.
• Confident wrong answers. Some comments will be plausible and wrong. Treat each one as a suggestion to verify, not a verdict.

That is why the human checklist in how to review AI-generated code still matters, especially for auth, payments and personal data.

Frequently asked questions#

What is the best free AI code review tool for a solo developer?#

For public repos, CodeRabbit and Sourcery both offer free reviews. For private repos, Greptile's Starter plan is free for 1 active developer with 50 credits a month (a Base review is 1 credit). If you already pay for Copilot Pro at $10/mo, Copilot code review is included and draws on your AI credits. PR-Agent is free and MIT-licensed, but you pay for your own LLM API usage.

Is GitHub Copilot code review free?#

No. GitHub's docs say Copilot Free does not include Copilot code review. It is available on Copilot Pro ($10/mo), Pro+ ($39/mo) and Max ($100/mo), and on Business and Enterprise. Reviews use AI credits; GitHub estimates an average review at about $0.25 on Lite, $1.50 on Balanced and $10 on Max effort.

CodeRabbit vs Greptile: which is cheaper for one developer?#

For a single developer, Greptile is cheaper to start: its Starter plan is free with 50 credits a month, and Pro charges $1 per credit with no seat fee. CodeRabbit Essentials is $24/user/mo billed yearly or $30 monthly and covers 1 linked repository. CodeRabbit's free plan reviews public repos but only summarises PRs on private repos.

Can I self-host an AI code reviewer?#

Yes. PR-Agent is MIT-licensed and can run as a GitHub Action, CLI, Docker container or webhook server with your own model key, across GitHub, GitLab, Bitbucket, Azure DevOps and Gitea. The Claude Code GitHub Action runs on your own CI runners. Hosted vendors such as CodeRabbit, Greptile, Qodo and Sourcery list self-hosting only on Enterprise plans.

Does AI code review replace human review?#

No. Tools such as Claude Code Review say a review with no findings does not mean your code is error-free or secure, and GitHub notes Copilot excludes some file types. AI reviewers miss business-logic errors, product decisions and anything they cannot see in the diff. Use them as a first pass and keep a human checklist for auth, payments and data handling.

Ship it, then launch it#

A reviewer catches bugs before your users do, which matters most in the week you launch. When your product is ready, work through our guide on how to launch a bootstrapped app, then submit it to ZeroRaised for free. For more tool comparisons written for founders without investors, join the ZeroRaised newsletter.

Sources#

• CodeRabbit pricing, last checked 13 Nov 2026
• CodeRabbit plans documentation, last checked 13 Nov 2026
• CodeRabbit configuration reference, last checked 13 Nov 2026
• Greptile pricing, last checked 13 Nov 2026
• GitHub Docs: Copilot code review, last checked 13 Nov 2026
• GitHub Docs: configure automatic Copilot code review, last checked 13 Nov 2026
• GitHub Copilot plans, last checked 13 Nov 2026
• Cursor pricing, last checked 13 Nov 2026
• Cursor Bugbot, last checked 13 Nov 2026
• Cursor Bugbot docs, last checked 13 Nov 2026
• Graphite pricing, last checked 13 Nov 2026
• Qodo pricing, last checked 13 Nov 2026
• Sourcery pricing, last checked 13 Nov 2026
• PR-Agent on GitHub, last checked 13 Nov 2026
• Claude Code GitHub Actions, last checked 13 Nov 2026
• Claude Code Review, last checked 13 Nov 2026
• Claude Code Review costs and usage, last checked 13 Nov 2026
• OpenAI Codex in GitHub, last checked 13 Nov 2026
• Codex pricing, last checked 13 Nov 2026
• Google Cloud: Gemini Code Assist quotas, last checked 13 Nov 2026
• Google Cloud: customize Gemini Code Assist review, last checked 13 Nov 2026