foropensource

Algolia for Open Source (search API credits)

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).

Eligibility: for the project; non-commercial only; public repo required; Open to licensed open source software, developer community projects, or legally-recognized non-profits with needs exceeding the standard free tier. Requires displaying a "Search by Algolia" logo linking to algolia.com (alternatives negotiable).

How to apply: Application form on the offer page; questions to community@algolia.com.

last verified 2026-07-06

Cal.com OSS sponsorship (sponsored team plan)

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.

Eligibility: for the project; Project must be open source and non-commercial, or a commercial open source company with less than $2M ARR; must explain why the generic free tier / self-hosted open core is insufficient. Limited openings per month; requests reviewed monthly at Cal.com's discretion.

How to apply: Email peer@cal.com with project description, confirmation of criteria, why the free tier is insufficient, your Cal.com team slug, and a link to the repository.

last verified 2026-07-07

Cloudsmith open source repository hosting

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.

Eligibility: for the project; Primary project must be free and open source; applicant must be a maintainer with significant control; no minor forks; artifacts served must be for the project itself (not dependencies only); visible attribution to Cloudsmith required; commercial entities should use paid plans.

How to apply: No advance approval needed: create an open source repository and follow the policy; Cloudsmith may verify eligibility later.

last verified 2026-07-06

Concord data privacy / consent compliance platform (Essentials plan)

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

Eligibility: for the project; public repo required; Must be a verifiable open source project; application asks for a link to a verifiable open source repo.

How to apply: Fill in the form on the open source page with name, email, website URL, and a verifiable open source repo link.

last verified 2026-07-06

Cossistant Pro plan (OSS friends Program)

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.

Eligibility: for the project; non-commercial only; public repo required; Requires a public GitHub repo with recent activity and 100+ stars; project must not be profitable yet. In return, must keep Cossistant branding in the widget and display a linked OSS badge in the README.

How to apply: Apply via the "Join the OSS friends Program" button on the page.

last verified 2026-07-07

CppDepend Pro (Open Source Contributor License)

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.

Eligibility: for contributors; project at least 3 months old; Applicant must be a project lead or active committer with at least three months of contributions and active community engagement. Requires adding the CppDepend logo with a link on the project page.

How to apply: Add the CppDepend logo/link to the project page, then email support@cppdepend.com with your name and project URL.

last verified 2026-07-07

Crowdin (Open Source plan)

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.

Eligibility: for the project; OSI license required; non-commercial only; public repo required; project at least 3 months old; Must be the project lead; project needs an active collaborator community, regularly updated website news, and regular releases. Applicants agree to join the beta group and contribute translations to the shared translation memory.

How to apply: Create a translation project in Crowdin, then submit the request form on the offer page (project name, license, website, description).

last verified 2026-07-06

Gandi Supports (domains/hosting support for community projects)

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.

Eligibility: for the project; Not exclusively open source — program targets "concrete, open, alternative" projects offering an alternative to dominant commercial suppliers; in practice most listed beneficiaries are open source/community projects.

How to apply: Email non-profit@gandi.net with your project proposal.

last verified 2026-07-06

Sonargraph (free open source license)

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).

Eligibility: for the project; Open source project must not be controlled by a for-profit company or a government entity.

How to apply: Contact sales@hello2morrow.com to request the free open source license.

last verified 2026-07-07

Imgbot automated image optimization (GitHub App)

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.

Eligibility: for the project; public repo required; Free plan covers public repositories only; private repos require a paid plan.

How to apply: Install the Imgbot GitHub App from the GitHub Marketplace listing and select the free open source plan for public repos.

last verified 2026-07-06

Localizely translation management platform

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."

Eligibility: for the project; Must be an open-source project or initiative; detailed criteria not published, reviewed per application.

How to apply: Submit the application form at https://localizely.com/open-source-project-request/ (linked from the pricing page).

last verified 2026-07-06

Lokalise for open source

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

Eligibility: for the project; public repo required; Open source projects; qualification is confirmed by Lokalise on contact. Specific criteria are not published on the pricing page.

How to apply: Contact Lokalise (via the contact option referenced in the pricing FAQ) to confirm the project qualifies for the free plan.

last verified 2026-07-12

MyGet Open Source subscription (package hosting)

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.

Eligibility: for the project; OSI license required; non-commercial only; project at least 3 months old; Applicant must be a project lead or active contributor (commit within the last month); project must comply with the OSD, not be backed by commercial entities or paid contributors, and not sell services or paid versions.

How to apply: Web form on the offer page with name, email, project details, license, project age, and your role.

last verified 2026-07-06

Free for Open Source program (hosted package repositories)

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.

Eligibility: for the project; Must have an open source project; detailed criteria not published, granted on request.

How to apply: Sign up for the free 14-day trial at packagecloud.io, then contact packagecloud support to request the Free for Open Source program.

last verified 2026-07-06

POEditor (Open Source Project status)

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.

Eligibility: for the project; OSI license required; Must provide the OSI-approved license type, a project description, and a link to the project page when requesting OS status.

How to apply: Create a project in POEditor, then in project Settings > Advanced click the Request link next to "Open Source Project" and submit the form for review.

last verified 2026-07-06

PVS-Studio (Free Open Source License)

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.

Eligibility: for the project; non-commercial only; Project must be a personal creative endeavor; commercial projects, organization-developed projects (with financing or hired developers), and mirrors/forks are excluded. Requires adding PVS-Studio credit markup to the project's README.md and mentioning PVS-Studio in commits that fix issues it found.

How to apply: Add the required PVS-Studio markup to README.md, then fill out the application form on the offer page.

last verified 2026-07-07

Maven Central publishing

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.

Eligibility: for the project; Components must declare their distribution license in the POM and meet metadata/GPG/coordinate requirements; requires verified namespace ownership. Published artifacts are immutable.

How to apply: Sign up at central.sonatype.com (Google/GitHub/email), verify a namespace, then publish via the Central Portal or build-tool plugins.

last verified 2026-07-06

Stainless SDK generator Starter plan (free for FOSS)

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.

Eligibility: for the project; non-commercial only; Limited to qualifying non-commercial open source (FOSS) projects; reviewed and approved case by case.

How to apply: Create a free account, then email Stainless (address on pricing page) to request FOSS approval.

last verified 2026-07-07

Tolgee Cloud Business plan for open source

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.

Eligibility: for the project; Project must be open source software that can be freely used, changed, and shared (in modified or unmodified form) by anyone.

How to apply: Email info@tolgee.io or DM the team in the Tolgee Slack community.

last verified 2026-07-06

Transifex (Open Source plan)

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.

Eligibility: for the project; OSI license required; non-commercial only; public repo required; Project must have no funding, revenue, or commercialization model.

How to apply: Sign up via the "Use Transifex for Free" link on the open source page (app.transifex.com/signup); eligibility is based on the stated criteria.

last verified 2026-07-06

Transloadit (file uploading and encoding API)

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

Eligibility: for the project; Open source projects and nonprofit organizations qualify; a "Powered by Transloadit" link on your website is required.

How to apply: Add a "Powered by Transloadit" link to your website and reach out to support@transloadit.com to apply.

last verified 2026-07-06

Upstash Open Source Program (monthly credits)

$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).

Eligibility: for the project; public repo required; For open source projects building on Upstash; no further formal criteria published. Application form notes it is open until September 29th, so availability may be time-windowed.

How to apply: Application form on the page (name, Twitter/X username, GitHub repo link); reviewed on a rolling basis.

last verified 2026-07-07

Hosted Weblate (Libre plan)

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.

Eligibility: for the project; public repo required; Must be a public libre (free/open source licensed) project.

How to apply: Set the project up on hosted.weblate.org/hosting/ and request the Libre plan; no formal application form beyond project setup.

last verified 2026-07-06