A Linux Foundation project · Built on open standards for advancing next-gen global digital health

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The OHS Software Foundation builds and maintains open, reusable building blocks for digital health — standards-based libraries, SDKs, and reference tooling that make it dramatically easier to build interoperable, AI-ready solutions.

The idea is simple: stop rebuilding the same plumbing. When the foundational components are open, shared, and maintained in common, developers everywhere spend less time wiring up infrastructure and more time on the parts of a solution that actually improve care — and they keep ownership of what they build.

The shift we're built for:

• from vertical, single-program solutions → reusable building blocks ·
• from external vendor lock-in → locally-owned innovation ·
• from bespoke integrations → open standards & interoperability.

These building blocks are designed for the realities of global health — secure, offline-capable, and built to work in low-resource and low-connectivity settings — and are stewarded in a neutral, community-owned home at the Linux Foundation.

The OHS-SF organizes its work into three pillars — each a different way to engage, all grounded in open standards for health and AI.

Each repository in this organization belongs to one of the three pillars (filterable via the pillar property and ohs-* topics).

Standards-based building blocks. Foundational libraries, SDKs, and components for building with HL7 FHIR — the consolidated "plumbing" so you don't rebuild it | View Collection

Choosing a generation: android-fhir is the mature, production-proven stack for Android. The kotlin-* libraries are a Kotlin Multiplatform next generation under active development — ideal for cross-platform work, but APIs may still change.

A Multiplatform reference toolkit that shows how to assemble FHIR Foundations components into working solutions across Android, iOS, and Web — so teams build and deploy faster | | View Collection

Reference, not product. The Foundation publishes building blocks and reference toolkits — not standalone, deployable end-user products. Player is a starting point you adapt and own.

A neutral space for safe, effective AI in global health — forming. Model-agnostic collaboration on evals, benchmarks, verifiable AI, and supporting tooling (skills, MCPs), in partnership with the WHO and the wider ecosystem.

Repositories will appear here as the pillar takes shape. Have a project to donate or an idea to support? Let's talk.

We are looking for contributors, health systems, and technology partners to help shape the future of open-source digital health building blocks.

OHS-SF is a community-driven, vendor-neutral project hosted by the Linux Foundation, with open governance set by the community doing the work. The formal charter and governance model are being finalized by the formation group and will be published here as the Foundation launches.

We welcome contributions of every kind — code, documentation, testing, design, and field feedback from real deployments. Contributing to technical projects does not require Foundation membership.

• New here? Browse good first issue across the org.
• Each repository has its own contribution and build instructions in its README and/or CONTRIBUTING.md.
• Reporting a vulnerability? Healthcare software deserves extra care — please follow each repo's security policy and do not open public issues for security reports.

This project follows the OHS Software Foundation Code of Conduct. By participating, you are expected to uphold these standards.

There are multiple ways to join the conversation:

• 💬 Chat : Join on Discord
• 📅 Community calls: Subscribe to the Community Calendar
• 📨 General contact: hello@ohs.foundation

Sign up to our mailing list to receive regular updates and details for upcming calls and events

Open Health Stack launched in 2023 — created at Google in collaboration with the WHO and a global developer community — as a suite of Digital Public Goods for FHIR-native digital health.

OHS transitioned from a Google-led project into an independent, community-owned umbrella project at the Linux Foundation — a neutral home built to steward these building blocks for the long term and to serve the global health ecosystem that depends on them.

OHS components are released under the Apache License 2.0 unless a repository states otherwise.

_{HL7® and FHIR® are registered trademarks of Health Level Seven International. Use does not constitute endorsement.}