Open Source Supporters

GitHub repository ↗ synced 2026/8/9

Awesome Open Source Supporters

A curated list of awesome companies that offer their tools and services for free to Open Source and public projects.

Note: While there are many companies that have great free tiers (Slack, for example), this list focuses specifically on organizations that have made an overt commitment to the Open Source community through additional offerings.

Code Coverage

Codecov

Test coverage monitoring & alerting.

Coveralls

Test coverage history & statistics.

Code Quality

Better Code Hub

Source code maintainability analysis.

Codacy

Automated code reviews & analytics.

Code Climate

Automated code review & health analysis.

codebeat

Automated code review for mobile and web.

CodeFactor

Automated static analysis for C#, Java, CSS, JS, Ruby, Go and Python source code.

Hound

Source code style review.

lgtm

Automated code reviews for developers.

PullApprove

Approve GitHub pull request through code review.

Reviewable

Automated GitHub code reviews.

SonarCloud

Continuous code inspection.

StyleCI

PHP code style review.

Continuous Integration

AppVeyor

CI/CD for Windows developers.

Bitrise

Hosted CI/CD for Android and iOS, free for Public Projects.

CircleCI

Docker-based building with support of customized workflows.

Codefresh

Docker-native CI/CD.

Sauce Labs

Cross-browser testing, Selenium testing, and mobile testing.

Semaphore

Fast automated CI/CD.

Travis-CI

Automated CI/CD for Open Source.

DeployHQ requires-approval - Deployment automation.

Dependency Management

Dependabot

Automated dependency updates for Ruby, Python, JavaScript and PHP.

Greenkeeper

Automated dependency management for NPM packages (on GitHub).

pyup.io

Python dependency management.

Snyk

Continuous dependency vulnerability assessment.

Tachikoma.io

Dependency update as a service.

Documentation

GitBook

Collaborative application documentation.

Read the Docs

Documentation hosting platform.

Exception Reporting

BugSnag requires-approval - Exception tracking and reporting.
Honeybadger requires-approval non-commercial - Exception and uptime monitoring for Ruby.

Package Management

MyGet requires-approval - NuGet, npm, Bower, Maven, and Vsix package hosting.
packagecloud requires-approval - Maven, RPM, DEB, PyPi, and RubyGem hosting.

Project Management

ZenHub

Agile GitHub project management.

Zube

Project management for GitHub issues.

Monitoring

Healthchecks.io requires-approval - Cron job monitoring.
WebGazer requires-approval - Uptime and cron job monitoring with hosted status pages.

Localization

Crowdin requires-approval - Localization management platform.
LingoHub requires-approval - Translation management.
Lokalise requires-approval - Localization and Translation Software Tool.
POEditor requires-approval - Localization management platform.
Transifex requires-approval - Localization platform for translating digital content.
Weblate requires-approval - Web-based continuous localization.

Version Control

BitBucket

Git and Mercurial repository hosting.

GitHub

Git project hosting.

GitLab

Git project hosting.

Plastic SCM requires-approval - Distributed Git project hosting.

Miscellaneous

Algolia

`requires-approval` Search as a service API.

Cloud9

Cloud-based development environments.

Libraries.io

Open source discovery service.

Sourcegraph

Smart source code transparency.

Siteleaf

CMS for static sites.

Apiary requires-approval - API design, development, and documentation platform.
Atlassian requires-approval - Productivity tools for teams (Jira, Confluence, Bamboo, HipChat).
Auth0 requires-approval - SSO & token-based authentication.
BrowserStack requires-approval - Cross-browser testing tool.
Firezone requires-approval - Self-hosted remote access built on WireGuard.
GlobalSign requires-approval - SSL certificates for open source projects.
Helpmonks requires-approval - Collaborative team email inboxes.
JetBrains requires-approval non-commercial - Software vendor specializing in the creation of intelligent development tools.
LoginRadius requires-approval - Authentication and SSO Made Simple.
Mailman 3 requires-approval - Mailing lists for distributed teams.
Mailtrap requires-approval - Fake SMTP testing server.
Netlify requires-approval - Hosting for static sites.
testmail.app requires-approval - Automate end-to-end email tests with unlimited mailboxes and a GraphQL API.
Transloadit requires-approval - API for file uploading & encoding.
Zulip requires-approval - Chat for distributed teams.