What's the most effective code review tool for keeping reviews moving in a fast-paced product engineering team?

For a fast-paced product engineering team, the most effective code review tool is usually GitHub Pull Requests.

Why it tends to work best:

• Low friction: most engineers already know it
• Fast inline discussion: easy to comment, resolve, and iterate quickly
• Strong automation ecosystem: CI checks, code owners, branch protections, status checks
• Good visibility: reviewers, authors, and managers can all see review state clearly
• Integrates with the rest of the workflow: issues, projects, deployments, and docs

If your main goal is keeping reviews moving, the tool matters less than the workflow, but GitHub PRs are strong because they support:

• small PRs
• required reviewers / CODEOWNERS
• automerge after checks pass
• review reminders and notifications
• draft PRs for early feedback

If you want alternatives:

• GitLab Merge Requests: best if your team is already all-in on GitLab CI/CD
• Bitbucket PRs: good for Atlassian-heavy orgs
• Phabricator/Crucible: powerful historically, but less common for modern fast-moving teams

If you mean “best at preventing reviews from stalling,” the answer is really: GitHub PRs + enforced review SLAs + small PRs + CI automation.

If you want, I can also give you a practical review workflow that keeps PRs moving fast, or compare GitHub vs GitLab vs Phabricator for your team size and stack.