See what your open-source project can get, free.

Free 1Password Teams account for the project team, on all platforms (Mac, Windows, iOS, Android, Linux, browser), including developer features such as SSH key management, Git commit signing, CLI authentication with biometrics, and secrets management integration.

Free-forever AI code reviews and security checks for open source projects: AI code reviews with automated fix suggestions, PR security reviews, open source dependency scanning, IDE plugins, integrations (Jira, Linear, Drata, Vanta), reports and analytics, AI/bot protection, and attack surface monitoring.

200 units free per month on the standard pay-as-you-go plan, translating to 200,000 records and 200,000 search requests (worth roughly $180/month).

AWS promotional credits (valid one year) for open source projects, typically used for upstream and performance testing, CI/CD, and storage of artifacts on AWS; usable on compute, storage, database, and developer tooling services. Over 200 projects funded since the 2019 launch.

6 months of free Claude Max 20x subscription for eligible open source maintainers and core contributors; program accepts up to 10,000 contributors.

Free Applitools licenses for open source projects ("providing free licenses to open source projects to help them deliver visually perfect user interfaces"). The page does not publish specific checkpoint/user limits.

Free sponsored AppSignal account for open-source software and "for good" projects, with core monitoring features: error tracking, performance monitoring, host monitoring, anomaly detection, uptime monitoring and log management. No named tier or hard limits published on the page.

Free CI/CD plan for open source: unlimited public projects, 1 concurrent job, 5 self-hosted jobs, 60-minute max build time, community support. Additionally, a 50% discount on all paid plans for open-source projects (and students/educational orgs) needing more compute or concurrency.

No-cost licenses for Araxis Merge (advanced 2/3-way file comparison, merging and folder synchronization tool) for contributors to open source projects.

Sponsored (free) visual regression testing beyond the standard free plan for qualifying open source projects; exact screenshot quota is agreed per-project when the free plan is insufficient.

No-cost Open Source licenses for Atlassian Standard cloud products (e.g. Jira, Confluence); the free offer applies to Standard plans only.

Free Developer Plan features for public open source projects: one dedicated concurrency per project, build times up to 45 minutes, unlimited builds, unlimited team members, public build pages/logs with automatic secret filtering.

Free use of Blacksmith's high-performance GitHub Actions runners and CI services for qualifying open source projects (program currently supports projects such as Celery, Ladybird, Zen and Limbo).

Free unlimited testing on desktop and mobile with Live, Automate, and Percy for 5 users and 5 parallel tests, across 3,000+ browsers and real devices; membership lasts for the duration of the project.

Free standard plan for open source projects and non-profits: unlimited BugSnag usage with up to 15,000 events per month, up to 15 collaborators, and access to the Releases Dashboard and Session Tracking.

Free access to the Pro plan (normally $30 USD per active user per month) for open source projects; usage and inclusions are discussed with Buildkite on a case-by-case basis.

Free access to the Bump.sh Pro plan (listed at $250/month) for open source projects, hosted API documentation and changelogs for OpenAPI/AsyncAPI definitions.

Completely free CDN for open-source packages: serves millions of npm and cdnjs packages globally from bunny.net's 119+ datacenters, with all logging disabled (no tracking or profiling), malware scanning of files before distribution, and packages permanently mirrored to Bunny Storage. URL-compatible with cdnjs/jsDelivr (swap hostname to cdn.hopjs.net).

Free Nix binary cache with a 5 GB storage limit (compressed) for open source projects, plus 20 Cachix Deploy agents.

Sponsored (free) access to Cal.com's paid team offering for open source projects (applicants provide their Cal.com team slug); exact plan tier is not specified on the page. In exchange the project must display a "Book us with Cal.com" banner in its footer and README with UTM-tagged links.

Free Advanced Installer Architect license (the highest tier) for developers of open source projects, for building Windows installers.

Complimentary (free) CatchJS subscription for open source software projects; site states they give free subscriptions to open source projects out of appreciation for the OSS community. Exact plan tier not specified on the page.

Free CDN77 content delivery services for accepted open-source projects ("we offer our services for free to those who make the internet a better place"). Sponsored projects include Blender, GNOME, Let's Encrypt, Fedora, Manjaro and 20+ others.

NOT free, a heavily discounted code signing certificate product for open source developers, priced "from EUR 69.00 gross" (far below standard code signing certificates). The set bundles the certificate with a cryptoCertum 3.7 IDPrime 940C mini cryptographic card and a card reader (ACS ACR39T-A1 or Omnikey 6121, depending on availability).

Free Chromatic for open source projects ("Free for open source. Building in the open? We'd love to support your project."). Specific snapshot limits for the OSS plan are not published on the pricing page.

Free CI/CD credits for open source organizations: up to 400,000 credits per month for Linux, Arm, and Docker builds plus 30,000 credits per month for macOS and Windows builds, with enterprise-grade features such as SSH debugging, Docker layer caching, and self-hosted runners.

Cirun service free forever for open source: unlimited public repositories and unlimited self-hosted GitHub Actions runners on all supported cloud providers, including ARM-based and GPU runners. Runners launch in your own cloud account, so underlying cloud compute costs are yours.

Recurring annual credits providing Cloudflare products free, tailored to project size: Pro/Business/Enterprise plan upgrades (Rules, Polish image optimization, WAF, Security Analytics, Page Shield), increased Workers and Pages request limits, expanded R2 object storage, advanced Zero Trust (Remote Browser Isolation, unlimited users), and a dedicated Discord channel.

At least 50 GB of artifact storage plus 200 GB/month of package delivery free across open source repositories (28+ package formats, global CDN edge distribution), including Pro-plan features such as geo/IP restrictions, access logs, and statistics. Exceptional projects can negotiate larger sponsored quotas.

Free-forever Open Source plan for public repositories: cloud-hosted code quality and security scans, AI-powered code review, shared coding standards across 49 languages, coverage reports, and GitHub/Bitbucket/ GitLab integration. Pricing page labels Team-plan features "Free forever for open-source projects."

Forever-free plan for open source with unlimited public repositories on Codeac's automated code quality / SAST analysis platform; private repositories require the paid Pro plan.

CodeAnt AI's AI code review, SAST security scanning, and code quality platform at 100% off (free) for open source projects.

Free Git repository hosting on Forgejo, static site hosting via Codeberg Pages, CI/CD (Woodpecker-based), and a Weblate translation instance, run by a Berlin-based non-profit funded by membership dues and donations (629k+ projects hosted).

Free code coverage analysis for open source projects, including coverage reporting, PR comments with coverage information delivered directly on pull requests, and status checks to block pull requests that fail to meet coverage targets. Page states Codecov "will always be free for open source projects."

Free Community plan ($0/month) with unlimited public repositories and unlimited users for automated code quality / static analysis; private repositories are not included (0 private repos on the free plan).

Free AI code reviews forever for public repositories (rate-limited Pro features), including PR summarization and reviews in IDE/CLI, with no additional setup required.

Free CodeScene community edition for open source projects: automated code reviews via PR integration, technical debt management with Hotspots, Code Health measurement, knowledge distribution visualization, PDF analysis reports, virtual code review, and customizable Code Health rules.

Free continuous performance tracking in CI with unlimited users for open-source projects (private repos capped at 5 users), unlimited repository runs, 600 macro runner minutes/month, 3-month history, pull-request performance reports, and CPU/wall-time instruments.

Essentials plan free for life for verifiable open source projects: data privacy compliance management and consent/trust tools for the project's site.

Free Convex Pro for one team with the built-in monthly Pro resource limits, plus swag (stickers, shirts, gear) and direct access to the Convex team and developer community.

Cossistant Pro plan (support/chat widget) free with included credits, plus a dofollow listing on their featured projects page, a guest blog post opportunity, and integration/customization help from the team.

Free test coverage tracking, history, and statistics for open source repositories. Pricing page states "Coveralls will always be free for open source."

Free static analysis for open source projects in Java, C/C++, C#, JavaScript, Ruby, or Python, analyzing every line of code and potential execution path, with defect root-cause explanations, GitHub/Travis CI integration, and a web interface for triaging defects. Build submission frequency limits vary by project size.

Free CppDepend Pro license (C/C++ static analysis: code quality metrics, dependency analysis, code review automation, reports) for active open source contributors; reported as a 1-year license.

Crowdin localization management platform "completely free of charge for open-source projects" including access to beta features, the Global Translation Memory, and Neural Machine Translator access.

cubic's AI code review is 100% free for open source teams: connect it to a public repository to get unlimited AI reviews on pull requests, with codebase-wide, context-aware analysis.

Free Cypress Cloud plan for qualifying open source projects with 5 free user seats, 100,000 test results per month, parallelization with load balancing, and access to integrations.

Free Datadog account for the project's own infrastructure: cloud observability and security platform including infrastructure and APM monitoring, 1,000+ integrations, code analysis and profiling, and database/user activity monitoring. Host counts and telemetry event volumes may be limited.

Free static analysis for unlimited public JavaScript/TypeScript projects, with automatic GitHub synchronization, code quality grading, and three months of historical trend data.

Free plan for open source: unlimited public repositories, unlimited team members, 1,000 pull requests reviewed per month, static analysis, SAST, IaC scanning, code coverage, secrets detection, and 1,000 automated code formatting runs per month (AI Review/Autofix are pay-as-you-go).

NOT free, a 50% discount on DeployHQ deployment automation plans for open source projects (also students and non-profits). A separate generic free tier (3 projects, unlimited deployments) is available to everyone.

Grants of DigitalOcean infrastructure credits for a project's development, infrastructure, and testing needs, usable on Droplets, managed databases, App Platform, and managed Kubernetes. Grant amounts vary by project tier; each grant lasts one year.

Free managed Discourse forum hosting on the probono plan: unlimited members and chat, unlimited public and private categories, unlimited tags, custom groups, email support, custom and community themes, custom domain, API and webhook access, and 5 staff seats. Hosted on a .discourse.group subdomain unless approved for a custom domain.

Verified DSOS badge on Docker Hub, removal of Docker Hub rate limits for the project's public images (for maintainers and everyone pulling them), and one-year free Docker Team subscriptions for core contributors including Docker Desktop, 15 concurrent autobuilds, unlimited vulnerability scans, RBAC, audit logs, unlimited teams, and scoped tokens.

Free JProfiler (Java profiler) licenses covering a project's core committers, granted in exchange for a link to the JProfiler site (preferably a text link containing "Java profiler" no nofollow).

Free install4j (multi-platform Java installer builder) license for the project's developers, granted in exchange for a link to the install4j site (preferably a text link containing "multi-platform installer builder" no nofollow).

Ellipsis automated AI code review on GitHub pull requests, completely free for public GitHub repositories with no stated usage limits (private repos instead get a $10/month free usage tier then usage-based billing).

Free Small Business subscription to elmah.io (error logging and uptime monitoring for .NET) to monitor your open source project. Subscription may only be used for the open source project itself.

Emerge's mobile app Size Analysis free for non-commercial open source projects: automated size insights, size tracking on every pull request, public shareable build links, dynamic README badges, and up to 5 maintainer accounts.

Free Fastly services (CDN, edge delivery and related services) for eligible open source projects and the nonprofits that support them. Program has backed major ecosystems (Python, Rust, Ruby, Apache projects) since 2014; exact quotas are agreed after application.

Fibery is 100% free for all open-source projects (full product at no cost, not a discount). Fibery also offers a separate 50% permanent discount for educational and nonprofit organizations.

Case-by-case free support, the page states Gandi helps projects with "financial, technical, administrative, or moral" assistance (historically free domain names and hosting). No fixed tiers or quantities are published; supported projects listed include Debian, Ubuntu, GNOME, Framasoft, and Creative Commons.

Free branded documentation site for open source projects on the "Sponsored site" plan: custom domain, logo, theme and fonts, scaled docs with sections and groups, AI Assistant, advanced site insights, private share links, and search indexing control. Sites can optionally run ethical ads to fund the project; GitBook takes none of the ad revenue.

Free GitHub Copilot Pro subscription (the paid individual tier) for maintainers of popular open source repositories.

GitHub Actions CI/CD minutes and Packages storage are free for public repositories on all plans (private-repo quotas like 2,000 minutes/500MB on Free do not apply), and paid-tier features such as repository rules, code owners, draft pull requests, and multiple pull request assignees are available free on public repositories.

Free GitLab Ultimate features (SaaS or self-managed) plus 50,000 compute minutes calculated at a program-specific cost factor. Technical support is not included.

Up to $200/month in free Ona credits for open source maintainers and contributors, usable for Ona's cloud development environments and AI software engineering agents. Successor to the former "Gitpod for Open Source" free plan after the Gitpod-to-Ona rebrand.

Free GlobalSign SSL certificates for qualifying open source projects, helping users verify they are receiving unmodified authentic software or source code.

Free hosted Develocity instances for key open source projects, including Build Scan, Build Cache, Failure Analytics, and Performance Insights for build/test acceleration and observability. Sponsored recipients include Spring, the Apache Software Foundation, Kotlin, Micronaut, Quarkus, and JUnit.

Full Graphite Standard plan free for open source projects: unlimited stacking (stacked PRs), insights, automations, and the stack-aware merge queue, with no limit on the number of contributors.

Greptile's codebase-aware AI code review on pull requests, free (100% off) for qualifying open source projects.

Free vulnerability coordination / bug bounty platform for open source projects: security page with disclosure policy, report management with discussion tools, intelligent duplicate detection, hacker reputation and private invites, API access, and analytics dashboards. Only cost is a 5% payment processing fee if you choose to pay bounties.

Business plan free of charge for open-source projects and nonprofits: monitor 100 jobs, 1,000 log entries per job, 50 SMS/WhatsApp credits, 20 phone call credits, and email support (vs. the generic free tier's 20 jobs and no credits).

Free Sonargraph license for qualifying open source projects (architecture and static code analysis for Java, Kotlin, C#, Python 3, Go, TypeScript, C/C++); the free license also covers Sonargraph-Build for use in CI (e.g. breaking the build on metric threshold violations).

Helpmonks Hosted Edition (SaaS shared team inbox / email management) free of charge for open source projects; nonprofits instead get a discount of up to 30% on all plans.

A set monthly Heroku credit allocation for 12 months, typically $25 to $500 USD/month (discretionary), usable on Heroku products such as Dynos, Postgres, and Key-Value Store; not valid for third-party add-ons. Unused monthly credits do not roll over.

Free automated code style review on GitHub pull requests for public repositories ("Hound is free for public repos!"), with comments on style issues, support for 12+ languages (JavaScript, Ruby, Python, Swift, PHP, Go, TypeScript, etc.) and customizable style guides. Private repos start at $29/month.

Free Icons8 graphics for established open source projects, the license page states "Established open-source projects can get our graphics for free. For you, we'll open-source the needed resources." (Distinct from the generic free tier, which requires a visible link/attribution to icons8.com everywhere assets are used.)

Free "Open Source" plan: unlimited public repos, unlimited users. Imgbot losslessly compresses images in your repository and opens automated pull requests with the optimized files.

Free licenses for the full JetBrains product lineup (IntelliJ IDEA Ultimate, PyCharm, WebStorm, etc.) for a project's core contributors, for use on the open source project.

Free TeamCity Professional Server open source license: unlimited servers with up to 100 build configurations per server and 3 build agents per server at no cost, with free upgrades during the license term.

Free YouTrack issue tracking license for the open source team, requested through the JetBrains open source program (program covers team tools including YouTrack and TeamCity).

Free Pro tier for qualifying open source projects: 50,000 transactional emails per month via SMTP relay and HTTP API, unlimited verified domains, premium IP pool, inbound routing/webhooks, and delivery analytics; higher volume available on request.

Free production CDN for open source packages published on npm or GitHub: four CDN and three DNS providers with 540+ points of presence, HTTP/3, brotli compression, on-demand minification, file combining, version aliasing, usage statistics, and a public API. No stated usage limits for eligible open source packages; serves 150 billion requests/month.

Free program for open source projects and volunteer communities to use their own domain for email: custom-domain addresses (e.g. contact@, sponsors@, security@) with forwarding, DKIM/ARC signing, no mail server, no per-seat fees.

Free AI-powered test generation for sponsored open source projects: automated tests from API traffic and code changes, API schema coverage analysis, PR-ready test suggestions, CI credits monthly, and placement in Keploy's OSS showcase. Tiers: Spark (5 seats, ~$9.5K/yr value), Orbit (10 seats, ~$19K), Constellation (20 seats, ~$38K).

Free KeyCDN account for open source projects to accelerate delivery of "static assets on your website or a link to an open source library you want to accelerate" including global network coverage, instant cache purging via API or dashboard, and delivery analytics. Past supported projects include Meteor, webpack, and FreeNAS.

Free artifact distribution (software distribution and automatic updates via Keygen Dist) for popular open source projects; the page cites Tabby as an example project given free distribution and auto-upgrades.

Localizely (cloud translation/localization management platform) completely free for open-source projects; pricing page states "If you have an open-source project or initiative that would benefit from our cloud localization platform, we'd like to help."

Free use of the Lokalise localization/translation management platform for open source projects (non-profits get a discount rather than a free plan).

Free access to a cloud-hosted, bare-metal Mac mini (Apple silicon available) for building and testing on macOS, typically used as a remote CI build agent. Over 100 open source projects sponsored, including Homebrew and Swift Package Index.

Free hosting of GNU Mailman 3 mailing lists on the mailman3.com SaaS for open source software projects ("We love open-source software and provide free hosting for OSS mailing lists").

Full product at zero cost for open source projects ("Full product, zero cost. For open source and teams up to 5."): CI Insights, Test Insights, Merge Queue, Merge Protections, and Stacks, plus email support.

Free plan with unlimited open-source projects (plus 1 closed-source project), 10 analyses per day, and HTML reports; public GitHub repos on the free plan are rescanned roughly every 2.5 hours.

Mintlify Pro plan free forever for qualifying open source projects: hosted docs with custom domain and branding, advanced analytics, and interactive API playground with live testing (Pro normally $250/month).

Free MyGet subscription for open source projects: public and community feeds, 1 GB storage, packages up to 100 MB each, Build Services and Symbols Services, and the option to promote feeds in the gallery. Higher storage can be requested in the application.

Complimentary Navicat license (database GUI/administration tools) for approved open source projects; sponsored projects display a Navicat logo on their website.

Up to $5,000 per year in Neon platform credits for open source projects that use Postgres, plus $20 per referred customer (unlimited) and promotional support (blog features, social media, case studies, co-marketing).

Free Open Source plan with 10,000 credits per month, free production deploys, unlimited team members; sites remain active even if credits run out, and additional credits can be purchased at Pro plan rates.

Free Nx Cloud plan for open source projects: fully managed remote caching, distributed task execution and unlimited CI pipeline executions, plus free full-featured Nx Powerpack licenses for OSS maintainers.

6 months of free ChatGPT Pro with Codex access for open source maintainers, plus conditional access to Codex Security for repositories needing deeper security analysis.

One-time API credit grants of up to $25,000 per project from a $1 million fund, for open source projects integrating Codex CLI or OpenAI models (e.g. Codex-powered PR review or release automation).

Free web/product analytics for open source projects with up to 2.5 million events per month, full feature access (funnels, retention, custom dashboards, real-time analytics), unlimited team members, and priority support.

Free managed and unmanaged hosting for open source projects (full server, partial server, or colocation of project-owned hardware), run by the lab that hosts the Linux kernel, Apache Software Foundation, Drupal and 150+ other open source communities.

Free access to ARM (AArch64) and POWER (PowerLinux/OpenPOWER) servers for functional development and CI/testing of open source software on those architectures (not for performance testing).

Free hosted package repositories (APT/DEB, YUM/RPM, npm, Maven, PyPI, RubyGems, etc.) for open source projects, beyond the generic free plan (2 GB storage / 10 GB bandwidth); the program announcement describes free hosting for OSS packages, with partner projects such as Phalcon and StackStorm.

Free localization for open source software with no string limitation (unlimited strings into unlimited languages, unlimited contributors), versus the regular free plan's 1,000-string cap.

$50,000 in PostHog credits (product analytics, session replay, feature flags, etc.) via the PostHog for Startups program; qualifying open source projects can additionally have the standard 12-month credit expiry waived, effectively making the credits non-expiring.

Free use for public repositories ("Free for public repos, 14-day trial for private"): code review workflow management via CODEREVIEW.toml with path-based ownership, approval requirements, and team-based review routing for pull requests.

Pullfrog covers AI model costs for qualifying open source projects, providing unlimited Kimi K2 usage at no cost for its GitHub coding agent.

Free one-year PVS-Studio static analyzer license (C, C++, C#, Java) for a non-commercial open source project; one license per project, renewable annually.

Qlty Cloud (successor to Code Climate Quality) code health and coverage service free for community-based open source projects; Free-plan support via Discord and GitHub on a best-effort basis.

Free, ad-supported documentation hosting for open source projects on Read the Docs Community: public repository cloning, public docs hosting, automatic builds, versioning, search, pull request previews, and CDN hosting. "Open source documentation is always free on Read the Docs Community."

Free-forever plan for open source projects with 100 MB storage and unlimited public packages on RepoForge's cloud-hosted package repositories.

All features free for public repositories, forever: full GitHub code review workflows (multi-round reviews, tracked discussions, review state). Free plan also covers repos attached to an individual user account; private organization repos start at $39/month for ten users.

Free native RISC-V GitHub Actions runners for any open source project on GitHub: bare-metal RISC-V servers (hosted at Scaleway, no emulation), Docker-in-Docker support, fresh isolated environment per job, one job per node; use label ubuntu-24.04-riscv.

Free Sauce Labs accounts for qualifying open source projects for cross-browser and mobile testing on the Sauce Labs cloud; historically the Open Sauce plan gave unlimited testing minutes on multiple parallel VMs with access to all OS/browser combinations.

Free access to Scout's Large plan with full features: application traces, error monitoring, log management, query analysis, and alerting. Supports Ruby, Python, PHP, and Elixir.

Free access to Screenshotbot's hosted screenshot/visual regression testing service for open source projects (the product is also open source and self-hostable).

Free continuous code quality analysis for open-source repositories; Scrutinizer does not charge for open-source repositories and you can add as many as you like.

Free sponsored plan with Business features and no term limit: 5M errors, 5,000GB logs, 1B spans, 100K replays, 500 cron monitors, 25 uptime monitors, 3K continuous profile hours, 150 UI profile hours, 10GB attachments, 1,000 size analysis uploads, and Seer for 5 active contributors; overage budget can be enabled.

Free code signing service and an OV-level code signing certificate issued to SignPath Foundation, with the private key stored on the Foundation's HSM. Supports signing EXE, MSI, Docker images, Office macros and more, with CI/CD pipeline integration (GitHub Actions, Azure DevOps, Jenkins), audit trails and policy enforcement, at no cost.

1 year of the Sleek Pro plan free for open source maintainers: real-time analytics, unlimited events, and everything offered to paying customers.

A free Snyk account with full enterprise entitlements and no usage limitations for open source projects, plus a members' Discord community with Snyk security professionals and dedicated help integrating Snyk into build pipelines and development environments.

Socket is "free to use for open-source" the Free plan covers unlimited developers and repos, 1,000 scans per month, detection of 70+ risk types, and automatic blocking of malicious dependencies. Qualifying open source organizations can additionally request a complimentary Team account.

SonarQube Cloud automated code quality and security analysis "free for analyzing open source projects" continuous analysis of public open source repositories across many languages and DevOps integrations.

Free open source plan on SonarQube Cloud (formerly SonarCloud): automated code review with continuous quality and security analysis for many popular languages and DevOps integrations, free for open source / public repository projects.

Free publishing and hosting of open source Java/JVM components on the Central Repository (Maven Central), the default artifact repository for the Java ecosystem. Free for ordinary community open source publishing; commercial-natured publishing may be subject to fees or limits.

Free project hosting for open source software: download distribution with unlimited bandwidth over a global mirror network, download analytics, git/Mercurial/Subversion repository hosting, issue tracking, forums, wiki documentation, and listing in the Open Source Directory (~20 million users, 2.6M downloads/day).

Pro features free for open source repositories, plus limited security scans for up to 3 repos run biweekly (paid Team plans have 200+ repos with daily scans).

Stainless Starter plan (normally $79/month per SDK generator) free for qualifying non-commercial open source projects: SDK generation from OpenAPI specs, plus documentation site and MCP server generation.

Free global CDN for open source projects: serves static assets from public Git repositories (GitHub, GitLab, Bitbucket), npm packages, and GitHub Gists via cdn.statically.io URLs, powered by bunny.net and Cloudflare. Note the /img/ image-proxy endpoint has been disabled due to abuse.

Free plan for public projects ("public PHP projects will always be free with StyleCI"): unlimited public repositories, unlimited analyses, and full fixing automation for PHP, JS, CSS, Vue.js, and Python code style.

Up to ten Named User 6-month subscription-free Oxygen XML licenses each year for a project's leads and core contributors.

Free SmartGit license (Git GUI client for Windows, macOS, Linux) for open-source developers, offered under syntevo's non-commercial license program (also covering students and public academic/charitable staff).

Free "Community on GitHub" plan for open source organizations, comparable to paid plans, intended for uses like shared build tools, internal test servers, and sharing project resources among developers. Exact user/device limits are not published on the plans page.

Full access to all Tembo features including AI agents, automations, and integrations, with unlimited contributors, priority support, and perpetual free access for as long as the project remains open source.

Free unlimited automated testing for open source projects with 2 concurrent tests, access to 6100+ browsers and real iOS/Android devices, support for Selenium, Cypress, Playwright, Puppeteer, Appium, Espresso, XCUITest and Maestro, plus video, screenshots, console/network logs, CI/CD integration and status badges.

Free licenses to test open-source projects across 5,000+ browsers and devices, access to the test orchestration platform with built-in CI and analytics, plus mentorship, promotion, and optional financial sponsorship (a $250,000 open source grants pool). Program materials also mention 10 HyperExecute parallel sessions and full Test-at-Scale access for OSS projects.

"Open" plan at $0 on the GitHub Marketplace: Testspace test management and results dashboard software for open source accounts.

Complimentary access to the Standard plan (normally $19 per active user per month) for independent or community-driven open source projects.

Tolgee Cloud Business plan free for open source projects (localization/ translation management platform); paid-tier features at no cost, granted on request. Self-hosting the open source Tolgee platform is also free.

Transifex localization platform free forever for qualifying open source projects, including collaboration with translator communities, APIs and SDKs, and support for 100+ frameworks and tools.

Free access to the Transloadit file uploading and media encoding platform for open source projects and nonprofits.

All paid Tuist server features free forever for open source projects, including binary caching and selective testing (build time improvements of 70% and more cited for cached builds).

$1,000 monthly credit grant covering all Upstash costs (Redis, QStash, etc.), direct technical/integration support with Pro-level priority, and co-marketing (technical articles, backlinks).

$3,600 in Vercel platform credits distributed over 12 months, an OSS Starter Pack with credits from third-party services, and priority community support from Vercel. Projects graduate after 12 months.

Comprehensive monitoring services at no cost for eligible open source projects: website monitoring (HTTP monitors), cron job monitoring (heartbeat monitors), and hosted status pages.

Free (gratis) Libre plan on hosted.weblate.org with the same limits as the 160k plan: 160,000 hosted strings, unlimited translation projects, components, and translators, with continuous localization features.

Free Wing Pro (Python IDE) license for unpaid open source development; includes upgrades only within the same major release version (reapply for new major versions). No support guarantees for free-license users.

Free YourKit Java Profiler license for developers of the open source project; one installed copy at a time per license key, for development of that specific project only. YourKit asks for a reference link on the project's web pages.

The monthly Basic, 3 Pack plan free for one year, a personal workspace, up to 3 active projects, and unlimited members.

Zulip Cloud Standard (the paid team chat plan, including full message history) free for open-source projects; Zulip sponsors hundreds of open-source projects including Rust and Lean.