Automated code review for GitHub pull requests

Hound comments on code quality and style issues, allowing you and your team to better review and maintain a clean codebase.

Sign In with GitHub

Enjoyed by

  • Netguru
  • Elastic
  • Namely
  • Envoy
  • Wealthsimple
  • Lumosity
  • Intuit
  • Middleman
  • Turing School
  • 18F
  • MeUndies
  • Envy Labs
  • GitLab
  • Mozilla
  • Yahoo

Currently supported

  • JavaScript

  • Ruby

  • Python

  • Swift

  • PHP

  • Sass

  • Go

  • Elixir

  • TypeScript

  • CoffeeScript

  • Haml

  • Shell

Read more about Hound’s supported linters

Why does code quality matter?

Defining and sticking with a consistent style helps reduce the amount of decisions that developers need to make when writing code, helping to keep their focus on logic, not semantics and formatting.
When every line of code is written in the same style, the whole codebase becomes easier to read, understand and de-bug. It also helps prevent areas of the codebase from being “owned” by one person’s unique style vs. the team.
A clean codebase is a reflection of a cohesive team. It gives the impression of a team working well together towards a common goal, rather than individual developers working independently.

How it works.

Hound integrates with your existing workflow by reviewing and commenting on code the moment a GitHub pull request is opened or updated.

write code, open a pull request, Hound comments on style violations fix style violations, merge

Save time, get better reviews.

Automated code review with Hound gives developers more time to give the kind of review that humans are best at giving.

Hound comments on a GitHub pull request with ‘trailing whitespace detected’ and the team follows up with questions and comments

Use our guides or configure your own.

Hound’s default style guides build upon accepted industry standards and are the result of years of utilization in software projects at thoughtbot. Have your own style guide or need to modify the default? Hound provides the ability to customize your guides to best suit your team’s needs.


Hound is free for public repos!
  1. Chihuahua

    Up to 50 private reviews

    $29 month

  2. Terrier

    Up to 300 private reviews

    $49 month

  3. Labrador

    Up to 1,000 private reviews

    $99 month

  4. Husky

    Up to 3,000 private reviews

    $199 month

Uncomfortable giving us access to your code?

Don’t worry, we get it. Our mission is to help you maintain a clean code base, nothing more. Our security documentation details what kind of access we need and why.