Open Wearables vs Sahha
Open-Source Alternative
Sahha gives you five health scores from a closed platform. Open Wearables gives you open algorithms, more devices, and self-hosted infrastructure you control.
One platform for wearable data and health intelligence.
Open Wearables is an open-source alternative to Sahha for teams that need both broad device coverage and control over the scoring layer. It integrates all major wearable providers, cloud-based ones through OAuth and on-device platforms like Apple HealthKit, Samsung Health, and Google Health Connect through native mobile SDKs, then normalizes every reading into one schema so your code never branches on data source. Health scores are documented and open: Sleep Score across duration, stages, consistency, and interruptions, and Resilience Score from heart rate variability. Because the algorithms are source-available, you can read the logic, adjust thresholds for your users, or replace a score entirely with your own. An MCP server exposes scores and trends to any LLM. The platform is MIT licensed and self-hosted, so it runs entirely on infrastructure you control. Built and maintained by Momentum.
Unified API
Connect wearable providers through a single REST API. One integration, all devices.
Open health scores
Sleep, HRV, recovery, VO2 max. Every algorithm published under MIT license and fully customizable.
AI-ready
MCP-compatible interface connects your LLM stack directly to wearable data. No proprietary intermediary.
Self-hosted
Docker Compose or one-click Railway. FastAPI, PostgreSQL, Redis, Celery. Your infra, your data.
Looking for a Sahha alternative? Sahha focuses on passive health scoring from mobile and wearable data. It handles a narrow set of devices and returns a fixed set of scores built on proprietary models. Open Wearables covers the same ground but differently: more providers, open scoring algorithms you can read and modify, and a self-hosted architecture that keeps your data on your infrastructure.
The comparison below covers the key differences between the two platforms.
Side by side.
| Aspect | Sahha | Open Wearables |
|---|---|---|
| Pricing | Per-user SaaS pricing | Self-hosted. You own your infrastructure. |
| Hosting | Cloud-only | Self-hosted. Your servers, your data. |
| Source code | Closed source | MIT licensed. Fully open. |
| Health scores | 5 proprietary scores. No access to logic. | Open algorithms: sleep, HRV, recovery, VO2 max. Customizable. |
| Wearable providers | Limited provider set | Garmin, Polar, Whoop, Strava, Apple Health, Samsung Health, Google Health Connect, Suunto, Oura |
| Data ownership | Data processed on Sahha's cloud | Full. Data never leaves your infrastructure. |
| GDPR / HIPAA | Dependent on Sahha's DPA | Self-hosted by design. You control compliance. |
| Deployment | SaaS only | Docker Compose or one-click Railway |
| License | Proprietary | MIT |
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Why teams choose Open Wearables as a Sahha alternative.
Five scores is not a platform
Sahha returns five health scores. That may be enough for some consumer apps. But if your product needs custom scoring, additional metrics, or the ability to explain how a score is calculated, Sahha's model is a ceiling, not a foundation.
Open Wearables ships open algorithms for sleep, HRV, recovery, strain, and VO2 max. You can read every calculation, adjust the weights, or add your own scoring logic on top.
More providers, more coverage
Sahha supports a limited set of devices. Open Wearables integrates with Garmin, Polar, Whoop, Strava, Apple Health, Samsung Health, Google Health Connect, Suunto, and Oura. If your users wear a range of devices, provider coverage matters.
Your data stays on your infrastructure
Sahha processes health data on their cloud. Open Wearables is self-hosted. Your database, your servers, no third-party data processing. For products operating under GDPR or HIPAA, that distinction is significant.
Self-hosted at any scale
Sahha charges per connected user. With Open Wearables you pay for compute, nothing else. At scale, that difference compounds significantly.
Who uses Open Wearables instead of Sahha.
Wellness and consumer health apps
Connect multiple wearables, compute open health scores, and build personalized experiences without paying per user or explaining black-box outputs to your team.
Clinical and digital health platforms
Full data ownership and self-hosted architecture means wearable data never leaves your infrastructure. Designed for environments where GDPR and HIPAA compliance are non-negotiable.
Sports performance and coaching tools
Open algorithms for HRV, recovery, strain, and VO2 max. Customizable scoring that fits your methodology, not a vendor's proprietary model.
Corporate wellness programs
Self-hosted at any scale. Connect devices across a large workforce without infrastructure lock-in.
Who is the Sahha alternative for?
Open Wearables
Open Wearables fits teams that need broad device coverage, customizable health scoring, or full data ownership for compliance reasons. It requires running your own infrastructure via Docker or a managed platform like Railway.
Sahha
Sahha fits teams that want passive health scoring out of the box with minimal setup, and whose use case fits within its fixed score set and supported device range.
How to get started.
Open Wearables is open-source and available on GitHub. Deploy via Docker Compose or one-click Railway, then connect to the wearable providers you need.
Each provider requires its own developer credentials, which you obtain directly from the provider. Open Wearables handles authentication, data normalization, and the unified API layer. The full setup guide is in the docs. For teams that want to talk through the integration first, the Momentum team is available for a demo.
See supported wearable providers: Garmin, Oura, Whoop, Strava and more →
Frequently asked questions.
How many health scores does Open Wearables support compared to Sahha?
Open Wearables ships open algorithms for sleep, HRV, recovery, strain, and VO2 max, with more in development. All scoring logic is published under MIT license and fully customizable. Sahha provides 5 proprietary scores with no access to the underlying models.
Which wearable providers does Open Wearables support?
Garmin, Polar, Whoop, Strava, Apple Health, Samsung Health, Google Health Connect, Suunto, and Oura. Full provider list is in the docs.
Is Open Wearables production-ready?
Yes. The wearable data layer is production-ready and used by healthtech teams in production. Open Wearables runs on FastAPI, PostgreSQL 18, Redis 8, and Celery, deployed via Docker Compose, with an architecture designed for horizontal scaling. Health scores are available now: Sleep Score computes a nightly 0-100 value across four pillars (duration, stages, consistency, interruptions), and Resilience Score measures autonomic nervous system stability weekly through heart rate variability. Check the GitHub releases for the current status of each component.
What does self-hosting actually require?
Docker Compose for a standard setup, or one-click deploy on Railway. The stack is FastAPI, PostgreSQL, Redis, and Celery. If you can run a containerized backend, you can run Open Wearables.
Who maintains Open Wearables?
Open Wearables is built and maintained by Momentum, a healthtech software house with 10 years of experience. MIT-licensed, backed by a commercial team with long-term skin in the game.
Open Wearables is built and maintained by Momentum, a healthtech software house with 10 years of experience. The platform is MIT-licensed and actively maintained. Momentum offers commercial services on top for teams that need custom integrations, enterprise deployment, or SLA-backed support.
More devices. Open algorithms. Self-hosted.
Deploy Open Wearables on your infrastructure. MIT licensed. Full data ownership.