HeyDeer

HeyDeer is an AI code review agent that reviews GitHub pull requests, posts only findings that survive a second-model check, and can push fixes to the branch through an "Autopilot" mode until the PR is ready to merge.

What is HeyDeer?

HeyDeer takes a GitHub pull request as input — in either a public or private repository — and returns review comments that name a severity, a category such as Correctness, and the exact line the finding came from. A companion mode called Autopilot goes further: it edits the code, pushes commits to the PR branch, and re-reviews each round until checks pass or the work needs a human. Installation is a two-click GitHub OAuth flow. The page does not name the company or team behind the tool.

What makes HeyDeer stand out?

• Precision claim — HeyDeer reports 99.0% precision on ReviewBench, the open AI-code-review benchmark leaderboard (checked October 31, 2026), ahead of Cursor Bugbot at 96.0%, Qodo at 95.3%, Greptile at 95.2% and cubic at 93.5%.
• Second-model verification — a different model checks each candidate issue against the code before anything is posted, a direct response to research showing coding agents follow review requests even when they can tell the request is wrong.
• Autopilot — fixes findings, failing checks and merge conflicts, pushes to the branch and reviews its own changes round after round.
• Walkthrough — every review ships a grouped reading guide marking what to read first, skim, or skip, with a diagram where browser, server and cache connect.
• Repository-standard compliance — HeyDeer reads REVIEW.md and AGENTS.md and runs checks in .agents/checks/, which it can author for you; each comment cites the rule and line behind it.
• Feedback scope — a workspace or single repository can be set to Concise, Balanced or Detailed to tune comment volume.
• Standard and Deep modes — Deep spends more time and credits on complex or sensitive changes; it is included in paid plans and can be set per workspace, per repository, or per PR.
• No seat fees — one workspace plan with shared credits instead of per-developer billing.

Who should use HeyDeer?

• Teams shipping agent-written code: engineers whose PRs come from Claude Code, Codex, Cursor or Copilot use HeyDeer as an independent reviewer that applies the same bar regardless of which model wrote the diff.
• Teams with written standards: a 9-developer team keeps coding rules in REVIEW.md and uses HeyDeer to audit API routes for missing access checks.
• Maintainers of public repositories: reviews of public repos are free up to a fair-use limit with no application step.
• Reviewers facing large pull requests: the walkthrough splits a change into must-read, should-read and skim groups so a reviewer knows where to start.

What can you do with HeyDeer?

• Ship a small PR: open the PR and HeyDeer reviews it, flags correctness issues like a cache key missing the currency, and Autopilot commits the fix and approves.
• Ask about existing code: mention @heydeer on an issue or PR to ask a question — on one issue it answered that sign-up required 12 characters while password reset accepted 8, then opened a follow-up PR unifying the policy.
• Hand off a job: mention @heydeer to request an implementation or a fix for a finding, with the answer posted where you asked.
• Understand a large PR: follow the walkthrough groups and diagram instead of reading every file.

How does HeyDeer work?

1. Open a pull request on GitHub; HeyDeer reviews it automatically.
2. Findings appear as comments with severity, category and the responsible line.
3. Click Autopilot to have HeyDeer fix findings, failing checks and merge conflicts, pushing commits to the branch.
4. HeyDeer re-reviews each round until the PR is ready to merge or needs you; you squash and merge.

Pricing

HeyDeer runs a freemium model with no seat fees. The Free plan includes 1,000 credits in the first month and 300 each month after that; Starter is $9 a month and Pro is $39 a month, with Deep mode included in paid plans. Reviews of public repositories are free within a fair-use limit.

Alternatives

Competitors named on the page include Greptile, Cursor Bugbot, Qodo, CodeRabbit, cubic, Graphite and Claude Code Review. HeyDeer's own comparison puts monthly cost for 10 developers at $14 for HeyDeer against $100 for Greptile, $100–$150 for Cursor Bugbot, $167 for Qodo, $240 for CodeRabbit, $320 for cubic and $400 for Graphite.

FAQ

Is HeyDeer free?

There is a Free plan with 1,000 credits in the first month and 300 every month after that. Starter costs $9 a month, Pro costs $39 a month, and public repository reviews are free up to a fair-use limit with no application required.

Does HeyDeer merge pull requests on its own?

No. Autopilot works a pull request until it is ready to merge, then hands it back for a human to merge. HeyDeer merges only when someone with write access explicitly asks it to in a mention, and existing branch rules still apply.

Which repositories does HeyDeer support?

HeyDeer works on GitHub pull requests in both public and private repositories. No other hosting platform is listed on the page, and setup runs through a GitHub OAuth install.

How does HeyDeer reduce false positives?

A separate model checks each potential issue against the code and only findings that hold up get posted. A feedback-scope setting lets you pick Concise, Balanced or Detailed for a whole workspace or a single repository.

Can HeyDeer follow our team's standards?

Yes. HeyDeer reads REVIEW.md and AGENTS.md in the repository, executes checks stored under .agents/checks/ — which it can write for you — and follows review instructions saved in HeyDeer, citing the source line on every comment.