Code & Development (4)

4 free AI code review tools and 3 more — pricing tier and real capabilities on every entry. No ads, no sponsored placement.

AllAI IDEs & EditorsTerminal & CLI AgentsCode Autocomplete & AssistantsApp Builders & Vibe CodingAutonomous Coding AgentsAI Code ReviewAI Docs & Codebase Q&AAI Testing & QAAI DevOps & SREAI Database & SQL CopilotsVector Databases & RAG InfraAI Game Development

CodeRabbit

AI Code Review
freemium
  • Agentic AI reviews on PRs and CLI with automated one-click fix suggestions
  • Multi-repo analysis, SAST/linter integration, and MCP connections
  • Usage-based Slack review agent priced per agent-minute
Visit

Greptile

AI Code Review
freemium
  • Free Starter tier with unlimited repositories for individual developers
  • Credit-based review pricing (1 credit = 1 standard review)
  • Deep codebase-context reviews (TREX) beyond diff-only analysis
Visit

PR-Agent

AI Code Review
freeNew
  • Open-source AI reviewer that describes, reviews and suggests improvements on pull requests
  • Runs as a GitHub Action, CLI or self-hosted app with your own LLM key
  • Supports GitHub, GitLab, Bitbucket and Azure DevOps
Visit

Sourcery

AI Code Review
freemiumNew
  • AI pull request reviews for GitHub and GitLab with summaries, bug findings and one-click fixes
  • Free for open-source projects
  • Does not keep code after review or train on it
Visit

AI Code Review — straight answers

What are the best free AI code review tools?

Flocci AI Tools lists 7 AI code review tools, ordered free tiers first: PR-Agent, CodeRabbit, Greptile, Sourcery and Qodo. 4 of the 7 are free or have a free tier. Every entry states what it uniquely does, not a score.

Are there completely free AI code review tools?

Yes — 1 of these are marked fully free with no paid plan attached: PR-Agent. The rest are freemium, trial or paid, and each row states which.

What should I look for in AI code review tools?

Start with what you need to do: get a reviewer on every pull request automatically. Then check the pricing tier, because "free" here means no paid plan at all while "freemium" means a free tier under paid plans. Every tool on this page lists both.

See the full list →

Head-to-head comparisons

CodeRabbit vs PR-AgentGreptile vs PR-AgentPR-Agent vs SourceryPR-Agent vs QodoCubic vs PR-AgentCodeRabbit vs GreptileCodeRabbit vs SourceryCodeRabbit vs Qodo

Free alternatives

CodeRabbit alternativesGreptile alternativesPR-Agent alternativesSourcery alternatives

Looking for a ranked shortlist instead? See the best free AI code review tools.