Best Code Review Tools in 2026

GitHub's pull request is the most familiar form of modern code review: a developer proposes changes on a branch, reviewers comment on lines, request changes or approve, and branch protection rules can require approvals and passing checks before merging. Pull requests are included in every GitHub plan, from Free to Team at US$4 per user per month and Enterprise at US$21. GitHub also offers Copilot code review, an AI reviewer that analyses pull requests, identifies issues and suggests fixes that can be applied in a couple of clicks; its agentic mode gathers full repository context and can hand fixes to the Copilot cloud agent, which opens a new pull request. Copilot code review is included in Copilot Business and Enterprise and available on the Pro, Pro+ and Max individual plans, and reviews consume AI credits, with GitHub estimating averages of about US$0.25 per review at Lite effort, US$1.50 at Balanced and US$10 at Max. GitHub states that Copilot is not guaranteed to find every problem, and some file types, such as dependency lock files and logs, are excluded from review.

GitLab's merge requests combine code review with pipeline results, security scan findings and approval rules in one view, which is the main reason organisations that run GitLab CI/CD review code there too. Reviewers can comment, suggest changes, resolve threads and approve, and with Ultimate organisations can require security approvals for merge requests that affect their security posture. AI assistance comes from GitLab Duo. GitLab's documentation lists two review features: Code Review Flow, an agentic reviewer that requires no add-on and consumes GitLab Credits, and the non-agentic GitLab Duo Code Review, which requires the GitLab Duo Enterprise add-on. Other merge-request features include generated descriptions, review summaries and merge commit messages on Premium and Ultimate, available on GitLab.com, Self-Managed and Dedicated in most cases. Premium costs US$29 per user per month billed annually and includes US$12 of GitLab Credits per user per month, and Ultimate is custom-priced. The self-managed option makes GitLab one of the few AI-assisted review environments that can run on the customer's own infrastructure.

Bitbucket is Atlassian's Git code-hosting product, sold as Bitbucket Cloud and as a self-managed Data Center edition. Atlassian markets code review and Jira integration as core Bitbucket capabilities, so reviewers can relate a pull request to the Jira work item behind it. Bitbucket Cloud is free for up to five users, Standard costs US$3.65 per user per month and Premium, which Atlassian describes as accelerating velocity with AI and automation, costs US$8 per user per month. Bitbucket is the lowest-priced of the major code hosts on a per-user basis, and is therefore common in small and mid-sized teams already paying for Jira. Its limitations for review are a smaller ecosystem of third-party review integrations than GitHub, and AI review capabilities that depend on the Premium tier and on Atlassian's wider AI products.

Gerrit is an open-source, web-based code review system for Git repositories, built around patchsets rather than branches. Each change is a single commit that is reviewed, revised as new patchsets and voted on before it is submitted to the target branch, which keeps history linear and makes every merged commit individually reviewed. Gerrit offers fine-grained permissions and integration with CI/CD pipelines, which typically post verification votes back to the change. The project describes itself as 100% open source with no licensing fees or vendor lock-in, and it is self-hosted, with releases in the 3.x series. Gerrit suits projects that require strict, commit-by-commit review. Its workflow differs from the pull-request model most developers know, so onboarding takes time, and running it requires server administration. It lacks built-in AI review, although plugins and external bots can add automated feedback.

SonarQube, from Sonar (SonarSource), is a static analysis product widely used for automated code review. It analyses code in more than 40 languages and frameworks for bugs, code smells, security vulnerabilities and coverage, and decorates pull requests in GitHub, GitLab, Bitbucket and Azure DevOps with quality-gate results. It is offered as SonarQube Cloud, SonarQube Server for self-managed deployment and SonarQube for IDE, plus SonarQube Advanced Security for SAST and software composition analysis. In 2026 Sonar also sells Gitar, an AI code review product that reviews every pull request in full context, writes fixes and iterates until CI passes, and has introduced a remediation agent and Sonar Vortex for verifying AI-generated code. SonarQube Cloud pricing is based on lines of code, starting at US$34 per month for up to 100,000 lines on the Team plan, previously listed at US$65, with a free tier. SonarQube complements rather than replaces human review: it enforces rules and finds defects but does not judge design.

CodeRabbit is an AI code review service that posts reviews directly on pull requests and also runs in the CLI, the IDE and inside AI coding-agent loops. Its reviewer summarises changes, comments line by line, learns from feedback given by the team and can verify that reported issues have been fixed. The company has added repository-wide scans and CodeRabbit Engineer, which can be assigned engineering tasks through Slack and is billed by agent run minutes. CodeRabbit is free for public open-source repositories, with sign-up through GitHub or GitLab. Paid plans were renamed in 2026: Essentials keeps the former Pro price and Team the former Pro Plus price, with a higher Enterprise-grade Advanced plan. The product's advantage is speed of adoption, since it installs as an app and needs no CI changes. As with every AI reviewer, its comments vary in accuracy and need human judgement, and seat-based pricing at US$24–US$72 per developer per month on annual billing makes it a significant addition to per-user tool costs.

Graphite is a code review platform that works on top of GitHub and is built around stacked pull requests: a developer splits a large change into a sequence of small dependent pull requests, each reviewed separately, and Graphite's CLI keeps the stack rebased. Small pull requests are easier to review, so the approach targets review speed in fast-moving teams. Graphite adds a review inbox, notifications, Slack integration, team insights, a VS Code extension, an MCP server and AI review through Graphite Chat and AI Reviews. In 2026 the company announced that Cursor Cloud Agents are available in Graphite, letting users create, review and ship changes from the pull request. The Hobby tier is free for personal repositories with limited AI reviews; Starter costs US$20 per user per month billed annually and supports all GitHub organisation repositories; Team, at US$40, adds unlimited AI reviews and chat. Graphite supports GitHub only, and its benefits depend on developers adopting the stacked workflow.

Codacy is an automated code review and code security platform that runs static analysis, SAST, software composition analysis, secrets detection and coverage tracking on every pull request and reports results as comments and status checks. It has added an AI Reviewer and AI governance products, AI Guardrails, AI Inventory and AI Risk Hub, aimed at organisations whose developers use AI coding assistants. A free-forever developer tier provides CLI and IDE plugins for VS Code, JetBrains and Cursor with local quality and security scans across 38 programming languages and agent hand-off for automatic fixes. The Team plan, for teams of up to 30 developers, starts at US$18 per developer per month on yearly billing or US$21 monthly, and Codacy is free for open-source projects. Codacy competes with SonarQube on rule-based analysis but prices per developer rather than per line of code, which suits large codebases maintained by small teams. Its Team plan's 30-developer cap means larger organisations move to quoted Business pricing.

DeepSource is a code health platform that combines static analysis, AI code review and open-source dependency scanning. Its AI review detects bugs, security issues and anti-patterns in every pull request and proposes automatic fixes; it also runs code formatters and supports monorepos. Pricing mixes a seat fee with usage: the Team plan costs US$24 per user per month billed yearly and includes unlimited repositories, pull request reviews and formatting runs, while AI review is metered per 10,000 lines of code processed, US$8 at Standard depth and US$15 at Advanced, with a US$100 annual credit included per user. Dependency scanning includes three targets, with additional targets at US$8 per month. An Enterprise plan adds an enterprise cloud, self-hosted deployment and bring-your-own-key options. The self-hosted option distinguishes DeepSource from most AI review start-ups. Its metered AI pricing requires monitoring for teams with large pull requests.

Qodo is an AI code quality company whose multi-agent code review platform enforces organisational standards on every pull request and draws on a knowledge base built from the codebase and pull-request history. The company offers its product free for open-source projects. The Pro Team plan, designed for up to 30 users, costs US$30 per user per month with unlimited reviews, a 14-day free trial without a credit card and no annual commitment. Additional AI usage is bought as credits at US$0.015 each, pooled across the team, with no rate limits, and an Enterprise tier serves larger organisations. Qodo positions itself on review depth and on enforcing organisational coding rules, rather than only commenting on diffs. As with other AI reviewers, quality of comments depends on the context and rules configured, and organisations above 30 users need Enterprise pricing.

Greptile is an AI code review product whose pull-request reviews can draw on cross-repository context, learned team preferences and custom context rather than only the diff. It also offers a knowledge base and an MCP server. Greptile's pricing is unusual in having no seat fees: the Pro plan supports unlimited developers and agents, and the organisation buys credits at US$1 each, shared across the team, with a base review costing one credit and a deeper Plus review three credits. A free Starter plan for one developer includes 50 credits per month, and Enterprise is custom-priced. Greptile also offers free usage for qualifying open-source projects and 500 free credits a month for six months to pre-Series A start-ups with under US$2 million of revenue. The credit model favours large teams with modest review volumes; organisations with many pull requests should compare total credit spend with seat-based rivals.

Collaborator, from SmartBear Software, is a peer review tool designed for organisations that must document their review process, such as automotive, aerospace and defence, healthcare, financial services, video games and embedded systems companies. It supports review of code and of other artefacts, including documents, with custom review templates, defect tracking, reporting for process improvement, regulatory compliance features and the ability to save reviews to a zip file as an audit record. Collaborator integrates with 11 source-control systems and supports GitHub pull requests, so teams can keep the code host while recording formal reviews in Collaborator. SmartBear describes its plans as customisable so that buyers pay for what they need, and prices are quoted; a free trial is available. The product is heavier than pull-request review and is chosen where auditable, checklist-driven review is a requirement rather than a preference.

P4 Code Review is Perforce's web-based code review tool for P4, Perforce's version control system; its product screenshots still carry the earlier Helix Swarm name. It integrates with data stored in P4, supports pre-commit and post-commit review models, tracks in-progress and historical reviews, and offers multiline comments, reactions and votes, SSO, MFA and an API. Users can request and open reviews from within the P4V client. An optional AI feature explains code or suggests improvements, but requires the customer's own OpenAI account and API key. P4 Code Review is free for existing P4 and P4 Cloud users, and P4 itself is free for small teams of up to five users and 20 workspaces. It is the natural choice for organisations that already keep their source and assets in P4. It is not designed for Git repositories, which limits its use outside Perforce environments.

Review Board is an open-source web-based tool for code review, image review and document review, developed by Beanbag. Developers post changes for review from the command line using RBTools, a set of command-line tools and a Python API, and the companion RB Gateway manages Git and Mercurial repositories inside a company network. The core product is free to self-host. Commercial add-ons include Power Pack, which adds enterprise integrations, reports and enhanced document review and can be tried for 60 days, and RBCommons, a hosted Review Board service. Review Board appeals to teams that need review across mixed version-control systems or want to review documents and images in the same tool as code, and to organisations that prefer self-hosted open-source software. Its interface and integrations are less extensive than those of the major code hosts, and it has no built-in AI reviewer.