Open Wearables vs Junction
Open-Source Alternative
Junction is a managed wearable data platform with proprietary infrastructure. Open Wearables is open-source, self-hosted, and MIT-licensed. No lock-in, no per-user fees.
One platform for wearable data and health intelligence.
MIT-licensed, self-hosted, and free per user. Built and maintained by Momentum, a healthtech software house with 10 years of experience.
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 Junction alternative? Junction aggregates wearable data through a managed cloud platform. It handles authentication and normalization, but your data flows through their infrastructure and you operate on their terms. Open Wearables solves the same integration problem as a self-hosted, open-source platform. You deploy it, you own the data, and the source code is yours under the MIT license.
The comparison below covers the key differences between the two.
Side by side.
| Aspect | Junction | Open Wearables |
|---|---|---|
| Pricing | SaaS pricing, per-user model | $0 per user. You pay for your own infrastructure. |
| Hosting | Cloud-only | Self-hosted. Your servers, your data. |
| Source code | Closed source | MIT licensed. Fully open. |
| Health algorithms | Proprietary | Open algorithms: sleep, HRV, recovery, VO2 max. Auditable and customizable. |
| Wearable providers | Selected providers | Garmin, Polar, Whoop, Strava, Apple Health, Samsung Health, Google Health Connect, Suunto, Oura |
| Data ownership | Data processed on Junction's cloud | Full. Data never leaves your infrastructure. |
| GDPR / HIPAA | Dependent on Junction'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 Junction alternative.
No lock-in, ever
Junction is a closed SaaS. Your integration depends on their infrastructure, their API, and their pricing model. If they change any of it, you adapt on their timeline.
Open Wearables is MIT-licensed. You deploy it on your own infrastructure, fork it, modify it, or migrate away from it at any point. The source code does not disappear because a vendor makes a business decision.
Your data stays on your infrastructure
With Junction, wearable data flows through their cloud before it reaches your application. Open Wearables runs on your servers. Your database. No third-party data processing, no external dependencies in your data pipeline.
No per-user fees at any scale
Junction charges per user. Open Wearables has no per-user fees. You pay for the compute you run.
At 10,000 users, the cost difference is not marginal.
Open algorithms you can actually use
Open Wearables publishes all health scoring logic under the MIT license. Sleep, HRV, recovery, strain, VO2 max. You can read every calculation, customize weights, or build additional scoring on top.
Junction's processing is closed.
Who uses Open Wearables instead of Junction.
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
Zero per-user fees at any scale. Connect devices across a large workforce without cost compounding with headcount.
Who is the Junction alternative for?
Open Wearables
Open Wearables fits teams that need full data ownership, want to avoid vendor lock-in, or are building for regulated environments where third-party data processing creates compliance risk. It requires self-hosting on Docker or a managed platform like Railway.
Junction
Junction fits teams that want a managed wearable data layer with minimal infrastructure overhead and are comfortable with cloud-based data processing and SaaS pricing.
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. 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.
Common questions.
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?
Open Wearables is at v0.3.0-alpha. Layer 1 (wearable data ingestion) is production-ready. Health scoring (Layer 2) is in active development. 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.
What if I need enterprise support or custom integrations?
The core platform is free and open-source. Momentum offers paid services on top: custom integrations, specialized ML models, enterprise deployment with SLA-backed support, and BAA for HIPAA-covered environments. Book a demo to discuss your requirements.
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.
Open-source. Self-hosted. No lock-in.
Deploy Open Wearables on your infrastructure. MIT licensed. $0 per user.
