A recent XDA piece put a number on something most engineering teams already know: nearly every developer uses AI coding tools daily, and almost none of them trust the output without a second pass. The autocomplete-2.0 generation is here. The “did this thing actually work” question is the bottleneck. We tested eight apps for AI code review on Windows, macOS, and Linux that aim to close that trust gap before code lands in main.
The benchmark for each: how it handles a real PR with multi-file changes, how often it surfaces useful findings (not noise), and what it costs at team scale.
What to look for in an AI code review app
A handful of criteria separate the tools that change how code lands from the ones that add a polite second pass nobody reads:
- Multi-file context. Reviewing one file at a time misses the changes-in-context that real code review is about.
- Codebase indexing. A tool that has read the whole repo catches inconsistencies a one-PR tool can’t.
- Custom rules. Org-specific patterns (“we don’t use lodash”, “always wrap fetch in this retry”) only land when the tool can be taught.
- IDE plus PR coverage. The earlier feedback comes, the cheaper it is. IDE-time review beats PR-time review every time.
- BYO key or hosted. Privacy-conscious teams want to point the tool at a self-hosted endpoint or their own Anthropic/OpenAI key.
- Findings filtering. Tools that flag every line as a concern train teams to ignore them. Tools that surface 3 high-signal issues per PR get read.
Quick comparison
| App | Best for | Free plan | Paid starts at | IDE coverage | PR coverage |
|---|---|---|---|---|---|
| CodeRabbit | Polished hosted PR review | Yes | $24/user/mo | VS Code, JetBrains | GitHub, GitLab, Bitbucket |
| Greptile | Codebase-aware review | Yes (limited) | $30/user/mo | VS Code | GitHub |
| Diamond | Real-time inline review | Yes | $20/user/mo | VS Code, JetBrains | GitHub |
| Sourcery | Refactor-first review | Yes | $12/user/mo | VS Code, JetBrains, Vim | GitHub, GitLab |
| Bito Code Review | Inline AI assistant + review | Yes | $20/user/mo | VS Code, JetBrains, CLI | GitHub, GitLab |
| Cursor Background Agents | Async refactor in the editor | Pro tier only | $20/mo Pro | Cursor only | n/a (editor) |
| Aider review mode | CLI review for solo devs | Yes | None (BYO key) | CLI/terminal | n/a |
| GitHub Copilot Code Review | Native GitHub PR review | Pro/Enterprise tier | $10/user/mo | VS Code, JetBrains | GitHub |
The 8 best apps for AI code review on desktop
1. CodeRabbit — best polished hosted PR review
CodeRabbit is the most polished hosted AI PR review tool in 2026. Multi-file aware, custom rule support via configuration files, inline comments on diffs, and a summary report on every PR. The IDE companion catches issues before commit, the PR pass catches everything after.
Where it falls short: Hosted only. The free tier covers open-source repos but caps reviews on private ones. Cost scales linearly with team size.
Pricing:
- Free: open-source projects, limited free tier on private
- Paid: Pro $24/user/mo, Enterprise custom
Platforms: Web app, VS Code, JetBrains IDEs
Download: CodeRabbit
Bottom line: Pick CodeRabbit when you want a turn-key hosted PR review with the strongest defaults.
2. Greptile — best codebase-aware review
Greptile indexes the whole repo before reviewing PRs. The findings come with cross-file context: “this change conflicts with the pattern in utils/api.ts:42” rather than “consider error handling here”. The IDE plugin lets you query the indexed codebase in natural language.
Where it falls short: GitHub-only at the PR layer. Indexing large monorepos takes hours on first run. Hosted only.
Pricing:
- Free: limited monthly quota
- Paid: Pro $30/user/mo, Enterprise custom
Platforms: Web app, VS Code
Download: Greptile
Bottom line: Pick Greptile when codebase-wide context is what your reviews keep missing.
3. Diamond — best real-time inline review
Diamond sits in the IDE and reviews changes as you type. The feedback loop is sub-second, which makes it more like a real-time linter than a PR tool. Pair it with a PR-time tool for full coverage.
Where it falls short: IDE-only; PR review piece is younger. Smaller plugin marketplace than CodeRabbit’s reach.
Pricing:
- Free: yes, with rate limits
- Paid: Pro $20/user/mo, Team $40/user/mo
Platforms: VS Code, JetBrains IDEs
Download: Diamond
Bottom line: Pick Diamond when most of the value should land before PR time and you want sub-second feedback in the editor.
4. Sourcery — best refactor-first review
Sourcery focuses on refactor suggestions rather than bug finding. Pattern detection for code smells, complexity reduction, and language-idiomatic rewrites in Python, JavaScript, TypeScript, and a growing set of others. The IDE integration is the strongest in this category.
Where it falls short: Python coverage is deepest; other languages are catching up. Refactor-first means it misses some bug categories CodeRabbit catches.
Pricing:
- Free: yes, single user
- Paid: Pro $12/user/mo
Platforms: VS Code, JetBrains IDEs, Vim/Neovim, Sublime Text
Download: Sourcery
Bottom line: Pick Sourcery when refactor quality is the part of code review you care about most.
5. Bito Code Review — best inline AI plus review combo
Bito combines an inline AI coding assistant (Copilot-style) with a code-review pass on PRs. The combo means one vendor, one billing line, and one set of rules across both surfaces. The CLI tool lets you script review into pre-push hooks.
Where it falls short: Smaller community than Copilot or Cursor. The review pass is decent but not the best-of-class.
Pricing:
- Free: yes, limited
- Paid: Pro $20/user/mo, Team $30/user/mo
Platforms: VS Code, JetBrains, CLI
Download: Bito
Bottom line: Pick Bito when one tool for both the assistant and the review pass beats stitching two together.
6. Cursor Background Agents — async refactor in the editor
Cursor Background Agents are the IDE-native version of code review for Cursor users. Spawn an agent to refactor a module while you keep typing, then review the diff inline. The async loop is the closest fit for “I want a quiet second opinion” workflows.
Where it falls short: Cursor-only. Per-agent token costs add up. PR-time review isn’t the model.
Pricing:
- Free: no, requires Cursor Pro
- Paid: Cursor Pro $20/mo, Business $40/user/mo
Platforms: Cursor on Windows, macOS, Linux
Download: Cursor
Bottom line: Pick background agents when Cursor is already your editor and you want long-running tasks reviewed by you, not landed by the agent.
7. Aider review mode — best CLI review for solo devs
Aider is the open-source AI pair programmer in your terminal. The review mode runs a structured pass over a diff with the model you choose. BYO API key (OpenAI, Anthropic, Gemini, or local via Ollama). The output goes straight into the same git workflow you already use.
Where it falls short: CLI-only. Solo-dev shaped. No PR-server integration.
Pricing:
- Free: yes, Apache 2.0
- Paid: model costs only
Platforms: Terminal on Windows, macOS, Linux
Download: Aider
Bottom line: Pick Aider when you live in the terminal and you want review power without a SaaS subscription.
8. GitHub Copilot Code Review — native GitHub PR review
GitHub Copilot Code Review is the native PR-time review available to Copilot Pro and Enterprise tiers. Tight GitHub integration, no separate billing if you already have Copilot, and the findings come with one-click suggested fixes.
Where it falls short: GitHub-only. The findings are less consistently signal-heavy than CodeRabbit’s. Tied to Copilot pricing.
Pricing:
- Free: no, Pro tier required
- Paid: Copilot Pro $10/user/mo, Business $19/user/mo, Enterprise custom
Platforms: Web app, VS Code, JetBrains IDEs
Download: GitHub Copilot
Bottom line: Pick Copilot Code Review when you’re already on Copilot and the native integration matters more than the best-of-class findings.
How to pick the right one
If you want one hosted tool that covers the PR pass cleanly: CodeRabbit.
If your reviews keep missing codebase-wide context: Greptile.
If you want the feedback in the editor at sub-second latency: Diamond.
If refactor quality is what you care about: Sourcery, especially on Python codebases.
If you’re already on Cursor: Background Agents fit your workflow with no new tool.
If you’re a solo developer who lives in the terminal: Aider in review mode.
Whichever you pick, set a custom rule file early. The defaults are good; the org-specific patterns are what make the tool stop reading like a polite junior dev and start sounding like a senior reviewer.
