We’re building an AI engineer for every software team.

What we hold ourselves to

• Precision before volume

  A wrong finding costs a person time, or becomes a wrong change in a coding agent’s hands. HeyDeer checks each finding against the code before it posts.

  Why precision comes first

• Measured in the open

  We run HeyDeer and other reviewers on the same real pull requests, check every finding against the code, and publish the results.

  Read the benchmark

• Your code stays yours

  HeyDeer never stores your code or trains AI models on it. Every review runs on a temporary clone that’s discarded when the work ends.

  How we handle your code

• Pay for work, not seats

  Every plan includes unlimited developers and repositories. You pay for the reviews HeyDeer runs, and the Free plan needs no credit card.

  See pricing

• We use it every day

  HeyDeer reviews our own pull requests every day, so we see its mistakes before you do.

  How our team reviews code

The people behind HeyDeer

Engineers behind open-source projects with tens of thousands of GitHub stars.

• Zihua Li
• Mateusz Zieliński
• Jianan Sun
• Wendy Zhang

Open source

• slimdeer

  MIT

  Smaller images. Same picture.

  Try it GitHub