Free tools & credits for open source

Anthropicclaude.com

Anthropic provides 6 months of free Claude Max 20x to open-source maintainers and contributors as a thank-you for keeping the ecosystem running.

CodeRabbitcoderabbit.ai

CodeRabbit provides free AI-driven code reviews for public repositories on GitHub and GitLab, backed by a $1 million commitment to open-source sponsorships.

GitHubdocs.github.com

GitHub provides free Copilot Pro access to maintainers of popular open-source repositories, enabling AI-assisted coding at no cost.

Greptilegreptile.com

Free AI code review for open source projects. Non-commercial projects with MIT, Apache, or GPL licenses get full access to Greptile's GitHub PR review bot at no cost.

OpenAIopenai.com

OpenAI offers 6 months of free ChatGPT Pro with Codex access, API credits, and conditional Codex Security access for open-source maintainers.

OpenAIopenai.com

A $1 million grant initiative providing one-time API credit grants of up to $25,000 for open source projects integrating Codex CLI or OpenAI models — separate from the Codex for Open Source subscription benefit.

Pullfrogpullfrog.com

Pullfrog aims to cover model costs for impactful open source projects by providing unlimited Kimi K2.6 usage.

Sourcerysourcery.ai

Free AI-powered code reviews for open source projects on public repositories, with full Pro-tier functionality including IDE integration and security scans.

Tembotembo.io

Tembo offers free access to its platform for open-source projects with OSI-approved licenses.

OpenPanelopenpanel.dev

OpenPanel offers free analytics for open-source projects with up to 2.5 million events per month, full feature access, and unlimited team members.

PostHogposthog.com

Free credits for small open-source projects covering product analytics, session replay, feature flags, error tracking, and more.

Sleek Anlyticsgetsleek.io

1 year of Pro plan

Blacksmithblacksmith.sh

Free high-performance GitHub Actions runners for open source projects. Blacksmith provides 2x faster hardware and 4x faster cache downloads, currently supporting projects like Celery, Ladybird, Zen, and Limbo.

CircleCIcircleci.com

CircleCI provides generous free build credits for open-source projects on the Free Plan, covering Linux, Arm, Docker, macOS, and Windows builds.

Semaphoresemaphore.io

Free unlimited CI/CD minutes for open source projects with four parallel Linux machines and one macOS machine, plus build badges and secret management.

Zulipzulip.com

Zulip Cloud Standard is free for open-source projects, providing organized team chat with topics, full message history, and powerful integrations.

1Passwordgithub.com

1Password provides a free Teams account to open-source projects, enabling secure storage and sharing of credentials, API tokens, SSH keys, and secrets.

Algoliaalgolia.com

Free or discounted Algolia plans for qualifying open-source and non-profit projects, including 200,000 records and 200,000 search requests per month.

Atlassianatlassian.com

Free Atlassian Standard cloud products including Rovo, Jira, Confluence, Trello, Bitbucket, and more for qualifying open-source projects.

Cal.comcal.com

Cal.com sponsors open source projects with free access to their scheduling platform. Projects must display a 'Book us with Cal.com' banner in their README and website footer.

Crowdincrowdin.com

Free localization platform for open source projects with an OSI-approved license, including translation memory, glossaries, 700+ integrations, and GitHub/GitLab/Bitbucket sync.

cubiccubic.dev

The leading AI code review platform – used by teams like Resend, n8n, Better Auth, and thousands of other open source teams.

GitBookdocs.gitbook.com

Free Community plan for open source projects with access to all Ultimate features (except SAML SSO), GitHub/GitLab sync, unlimited contributors, and no hosting fees.

GitLababout.gitlab.com

GitLab provides free Ultimate-tier features and 50,000 compute minutes for qualifying open-source projects through the GitLab for Open Source Program.

JetBrainsjetbrains.com

JetBrains offers free All Products Pack subscriptions for open-source project core teams, covering all JetBrains IDEs for development.

Mintlifymintlify.com

Non-commercial open source projects get Mintlify's Pro plan for free (normally $300/month), including custom domains, advanced analytics, API playground, AI chat, and version control.

Sanitysanity.io

Sanity offers its Growth plan for free to non-monetized open source projects, including 3 datasets, 25 users, SAML SSO, and no credit card required as long as you stay within quotas.

Stainlessstainless.com

Free Starter plan (normally $79/mo per generator) for qualifying non-commercial open-source projects, including SDK, documentation site, and MCP server generation from OpenAPI specs.

Webclawwebclaw.io

webclaw for OSS gives open-source builders 100,000 free web-scraping credits a month, a feature on webclaw.io, and a direct line to the team. You ship the tool. Your users find webclaw.

Microsoftgithub.com

The Microsoft FOSS Fund provides a direct way for Microsoft engineers to participate in the nomination and selection process to sponsor open source projects they are passionate about.

Netlifynetlify.com

Netlify offers a dedicated Open Source plan with generous credits, unlimited team members, and free production deploys for qualifying projects.

Vercelvercel.com

Vercel provides platform credits, community support, and an OSS Starter Pack with third-party credits to power open-source projects.

Cloudflarecloudflare.com

Project Alexandria provides recurring annual credits for open-source projects, including Zero Trust access, R2 storage, Workers, Pages, and plan upgrades.

Convexconvex.dev

Convex sponsors open-source developers building tools, frameworks, and apps that strengthen the ecosystem with free Pro credits, swag, and direct community support.

DigitalOceandigitalocean.com

Annual credit grants for open source projects tiered by GitHub stars, from $60/year (100+ stars) to $20,000/year (10,000+ stars), plus swag, co-marketing, and direct access to the open source team.

Dockerdocs.docker.com

The Docker-Sponsored Open Source (DSOS) Program provides verified badges, repository logo customization, insights and analytics, Docker Scout access, and removal of rate limiting for open-source projects.

Neonneon.com

Up to $5,000 in annual Neon credits for open source projects that use Postgres, plus cash payouts through GitHub Sponsorships and promotional support to Neon's 1M+ developer community.

Upstashupstash.com

Upstash supports open-source projects with monthly credit grants, direct technical support, and co-marketing opportunities.

Datadogdatadoghq.com

Free Datadog accounts for open source projects providing cloud observability and security monitoring. Used by the Apache Software Foundation, Python Software Foundation, ElectronJS, Ruby, and Linux Mint.

Sentrysentry.io

Sentry provides free error tracking and performance monitoring for open-source projects with generous usage limits and no term limit.

Unstatusunstatus.app

Unstatus Scale plan for qualifying open-source projects.

Codacycodacy.com

Free Team plan forever for open source projects, with full cloud platform access including PR integration, quality gates, and security scanning across 49 supported languages.

Code Climatecodeclimate.com

Free forever for all open source projects. Code Climate (now Qlty) provides code coverage, maintainability analysis, linting, and auto-formatting with unlimited contributors.

DeepSourcedeepsource.com

Free static analysis, SAST, code coverage, and automated code reviews for open source projects with unlimited public repositories and unlimited team members.

SignPathsignpath.io

Open-source projects can apply for a free code signing certificate through the SignPath Foundation, with secure signing, pipeline integrity, and full audit trails at no cost.

Snyksnyk.io

Snyk provides full Enterprise License access with unlimited usage for open-source projects, covering vulnerability scanning, dependency analysis, and security advisories.

Socketx.com

The Socket for Open Source program offers a free Team plan to open source maintainers to protect their projects from supply chain attacks.

SonarSourcesonarsource.com

Free static analysis for open-source projects on SonarQube Cloud, with unlimited members, feature branch analysis, and custom quality standards.

Cossistantcossistant.com

Free Cossistant Pro plan for open source projects, including credits, a dofollow listing, guest blog posts, and integration support.

Argosargos-ci.com

Free visual regression testing for open source projects. Argos sponsors qualifying OSS projects with full access to their visual testing platform in exchange for a README badge.

BrowserStackbrowserstack.com

BrowserStack provides lifetime access to its full testing platform for open-source projects, including cross-browser, real device, and visual testing.

Chromaticchromatic.com

Free visual testing plan for qualifying open source projects, built by the Storybook team. Includes 35,000 Chrome snapshots per month with cross-browser testing across Chrome, Firefox, Safari, and Edge.

Codecovabout.codecov.io

Free forever code coverage for open source projects with unlimited public repositories, PR comments, status checks, and API access. Trusted by over 60,000 OSS projects.

Coverallscoveralls.io

Free forever code coverage tracking for open source projects with support for C/C++, Go, Java, JavaScript, Python, Ruby, PHP, .NET, and more.