AI code review tools for pull requests (2026)

Agents and bots that read pull-request diffs, leave review comments and catch bugs before merge. Here are all 7 from the AgentScout directory.

How we picked and ranked: tools are matched by category, the pricing each maker states and what each tool says it does. They are ranked by GitHub stars as recorded on each listing (link checks 2026-10-18); tools without a tracked repo follow, by listing maturity. No paid placements.

1. G

   1. GitHub MCP Server

   MCP & infraOpen source★ 33,663 GitHub stars

   GitHub's official MCP server for letting agents work with repositories, issues, pull requests and Actions.

   Pricing (as stated): Open source · Mature

2. Q

   2. Qodo

   codingFreemium★ 13,415 GitHub stars

   AI code review and testing agents that work in the IDE, the terminal and pull requests to catch issues before merge.

   Pricing (as stated): Freemium · Mature

3. O

   3. Open SWE

   codingOpen source★ 11,034 GitHub stars

   LangChain's asynchronous coding agent that takes work from GitHub issues, Slack or Linear, implements it in an isolated sandbox and opens a pull request.

   Pricing (as stated): Open source · Mature

4. R

   4. Roomote

   codingFreemium★ 288 GitHub stars

   Cloud coding agent from the Roo Code team that runs your real dev environment, verifies its work, reviews code with a second model and hands back PRs with live previews; works from Slack, Teams, GitHub and Linear, self-hosted or on its cloud.

   Pricing (as stated): Self-host free up to 10 users; Roomote Cloud from $49/mo after a 7-day trial; bring your own model key · Active

5. D

   5. Devin

   codingFreemium

   Cognition's autonomous software engineer that takes tickets and opens PRs.

   Pricing (as stated): Free plan; Pro $20/mo; Max $200/mo; Teams $80/mo + $40/seat · Mature

6. A

   6. Almanax

   cryptoSee site

   AI security engineer that finds vulnerabilities in applications and smart contracts and reviews pull requests; acquired by depthfirst (June 2026).

   Pricing (as stated): 7-day free trial; paid plans · Active

7. C

   7. Coldtea

   codingPaid

   Agents that test every pull request on real devices, watch production and file issues before users hit them.

   Pricing (as stated): Paid · Active

FAQ

What are the best AI code review tools?

Ranked by tracked GitHub stars, the top AI code review tools in our directory are GitHub MCP Server, Qodo, Open SWE, Roomote, Devin. Stars measure popularity, not fit, so compare a few against your own task.

How many AI code review tools does AgentScout list?

7 tools match. This page shows the top 7. Pricing mix on this page: Freemium (3), Open source (2), See site (1), Paid (1).

How much do these tools cost?

Pricing is what each maker states on their site. Open-source tools are free to self-host but may need a paid model API key or offer paid cloud plans; freemium tools have a free plan with limits. Check each official site.

Where can I see every tool for reviewing pull requests?

Our task page lists all 7 tools we match to reviewing pull requests.

Related: All tools for reviewing pull requests · coding (5) · MCP & infra (1) · crypto (1)

By role: For developers

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Facts come from our directory listings; pricing is as each maker states it and can change. Check official sites before you choose.