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PR-Agent

Open-source AI agent that describes, reviews and suggests improvements on pull requests across GitHub, GitLab and more.

Open source
Visit pr-agent.ai PR-Agent (official site)Compare coding

What is PR-Agent?

PR-Agent is an open-source tool that uses language models to help with pull requests. Slash commands trigger each job: /describe writes a title, type, summary, code walkthrough and labels, /review produces a reviewer guide covering possible issues, security concerns, tests and review effort, /improve proposes code suggestions, and /ask answers free-text questions about the PR or specific lines. It can be triggered by commenting on a PR, through a webhook, inside CI or from the command line, including with a single Docker command that needs only an OpenAI key and a Git token. It works with GitHub, GitLab, Bitbucket, Azure DevOps and Gitea. Models are configurable, with fallback models and options for OpenAI-compatible APIs and Azure, and an optional run-details line reports tokens and estimated cost. The project is open source and free to run, with you paying only your model provider.

Use cases

  • Review pull requests with AI
  • Generate PR descriptions and labels
  • Get code improvement suggestions
  • Ask questions about a PR diff
  • Run PR checks in CI
  • Self-host a code review bot
  • Switch the review model with fallbacks

Who it's for

  • Software developers
  • Engineering teams
  • Open source maintainers
  • DevOps engineers

Why use PR-Agent

  • Adds a consistent first-pass review to every pull request before a human looks.
  • Free and open source, with a cost that depends only on the model you choose.
  • Slash commands keep the workflow inside the PR conversation.
  • Runs on the major Git hosts, so one tool covers mixed environments.
  • Model and fallback settings let you balance quality, cost and privacy.

PR-Agent features

  • /describe for PR title, summary and walkthrough
  • /review reviewer guide with issues and security notes
  • /improve code suggestions
  • /ask questions on the PR or code lines
  • /help answers from the docs
  • Add documentation and changelog update tools
  • Works with GitHub, GitLab, Bitbucket, Azure DevOps and Gitea
  • Configurable primary and fallback models
  • OpenAI-compatible API and Azure support
  • Optional run details with token use and estimated cost

PR-Agent integrations

  • GitHub
  • GitLab
  • Bitbucket
  • Azure DevOps
  • Gitea
  • OpenAI
  • Azure OpenAI
  • LiteLLM

How to get started with PR-Agent

  1. Install PR-Agent on your repositories, or try it with the Docker command and a PR URL.
  2. Provide a model key such as OpenAI and a Git provider token.
  3. Comment a command such as /describe, /review or /improve on a pull request.
  4. Read the generated summary, reviewer guide or suggestions and act on what is useful.
  5. Adjust models, fallbacks and tool settings in the configuration file.

PR-Agent limitations

  • You supply and pay for your own model API key
  • Setup and configuration are done by you through toml files and secrets
  • Run-cost figures are estimates and not provider invoices

PR-Agent pricing

PR-Agent is open source, so you can use and self-host it for free.

Prices can change and may vary by country or exclude tax. Check the official pricing page.

PR-Agent alternatives

The main PR-Agent alternatives listed on Debuly are CodeRabbit, Greptile, Sourcery, Codacy, Bodega One Code and Devin. The table compares pricing and platforms; order is A–Z.

PR-Agent compared with its alternatives
ToolPricingStarting pricePlatforms
PR-AgentOpen source—CLI, Docker, Self-hosted, GitHub
Bodega One CodeFree—Windows, macOS, Linux
CodacyFreemium$18/moWeb, CLI, API
CodeRabbitFreemium$24/moWeb, VS Code extension, CLI, Self-hosted
DevinFreemium$20/moWeb, CLI, API
GreptileFreemium$1, usage-basedWeb, API, CLI, Self-hosted
SourceryFreemium$12/moWeb, GitHub, GitLab, API

  1. Bodega One Code

    Free local-first AI coding agent and full IDE that runs parallel background agents on your machine with any local or cloud model you bring.

    CodingDeveloper platformsAutomation and agents
    FreeVisit Bodega One Code (official site)

  2. Codacy

    Automated code quality and security scanning with an AI reviewer for pull requests and free real-time guardrails in the IDE.

    CodingDeveloper platforms
    FreemiumVisit Codacy (official site)

  3. CodeRabbit

    AI code review for pull requests, IDEs and the CLI, with pre-merge checks, one-click fixes, triage and security scans.

    CodingDeveloper platformsAutomation and agents
    FreemiumVisit CodeRabbit (official site)

  4. Devin

    Cognition's AI software engineer, with a desktop app, CLI and cloud agents that take coding tasks through to pull requests.

    CodingAutomation and agentsDeveloper platforms
    FreemiumVisit Devin (official site)

  5. Greptile

    AI pull request reviewer that maps your whole repository, so each review weighs the change against code outside the diff.

    CodingDeveloper platforms
    FreemiumVisit Greptile (official site)

  6. Sourcery

    AI code review for GitHub and GitLab pull requests with summaries, suggested fixes and security scanning, free on public repositories.

    CodingDeveloper platformsAutomation and agents
    FreemiumVisit Sourcery (official site)

PR-Agent FAQ

How much does PR-Agent cost?

The software is free and open source. You pay your chosen model provider for API usage, and the docs show an optional estimate of the cost of each run.

Is PR-Agent open source?

Yes. The project describes itself as open source and the software is free to run; you pay only your model provider.

Which Git platforms does PR-Agent support?

It works with GitHub, GitLab, Bitbucket, Azure DevOps and Gitea.

What commands does PR-Agent have?

The main ones are /describe, /review, /improve and /ask. There are also tools for adding documentation, updating a changelog and /help.

Can I use a different AI model with PR-Agent?

Yes. You can edit the model and fallback_models settings, use an OpenAI-like API base, or configure Azure. Other providers work through LiteLLM with the right environment variables.

What are alternatives to PR-Agent?

Alternatives include CodeRabbit, Qodo Merge, GitHub Copilot code review, Greptile and Sourcery.

Sources & verification

Facts on this page come from the official sources below, each with the date we read it. Written by Debuly; the vendor did not review this page.

SourceTypeAccessed
pr-agent.aiofficial
github.com/The-PR-Agent/pr-agentrepository
pr-agent.ai/pricingpricing
docs.pr-agent.ai/docs
docs.pr-agent.ai/usage-guide/additional_configurations/docs
docs.pr-agent.ai/usage-guide/changing_a_model/docs
docs.pr-agent.ai/tools/docs

Image credits

  • Logo: from docs.pr-agent.ai · fetched · Vendor trademark, used only to identify the product; removed on request
  • Cover: none collected yet, so a generated tile is shown.

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