Open Source Alternatives
to Wearable API Platforms
Open Wearables is an open-source, self-hosted alternative to managed wearable data APIs such as Terra, ROOK, Sahha, Spike, and Junction. With a managed aggregator, your users' health records sit on the vendor's infrastructure and you rely on a data processing agreement to cover that relationship. A self-hosted deployment removes the question: the data lands in a PostgreSQL database you run, so there is no third-party processor in your compliance map and data residency becomes a deployment choice. The scoring layer is open too. Sleep Score and Resilience Score ship as readable source code with documented thresholds, so you can trace how any number was derived and retune it for your population. The wearable integrations are the same ones you would get from a managed service. The difference is that you own the stack, and the operational work that comes with it.
One platform for wearable data and health intelligence.
MIT licensed and self-hosted, 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 is 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.
Compare alternatives.
Each page goes deep on pricing, data ownership, provider support, and migration.
Open Wearables vs Terra
Terra is one of the most widely used managed wearable APIs. It charges a monthly fee plus per-API-call credits, runs cloud-only, and keeps its health scoring logic proprietary. Open Wearables covers the same provider set, self-hosted, on infrastructure you control.
Open Wearables vs ROOK
ROOK provides wearable data integration with its proprietary ROOK Score on top. The scoring logic is closed and the platform is cloud-only. Open Wearables publishes every algorithm under MIT license.
Open Wearables vs Sahha
Sahha focuses on passive health scoring from a limited device set, returning five proprietary scores. Open Wearables supports more providers, publishes open scoring algorithms, and runs on your own infrastructure.
Open Wearables vs Spike
Spike provides a managed wearable data API with cloud-based data storage and SaaS pricing. Open Wearables is self-hosted, MIT licensed, and runs on infrastructure you control.
Open Wearables vs Junction
Junction is a managed wearable platform with proprietary infrastructure and SaaS pricing. Open Wearables is MIT-licensed, self-hostable, and fully customizable with no vendor lock-in.
How Open Wearables compares across all platforms.
The same core difference across every competitor: self-hosted, open source, and running on infrastructure you control.
Pricing
Hosting
Source code
Health algorithms
Data ownership
GDPR / HIPAA
Frequently asked questions.
Is Open Wearables a drop-in replacement for Terra?
Open Wearables covers the same wearable providers as Terra and exposes health data through a unified REST API. The integration approach differs: Open Wearables is self-hosted, so your team deploys and operates the platform. If you are currently using Terra and evaluating alternatives, the docs and a demo call are the fastest way to assess fit.
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?
Wearable data ingestion is production-ready. Health scores are available now: Sleep Score for nightly sleep quality and Resilience Score for autonomic nervous system stability. Check the GitHub releases for current status.
What does self-hosting require?
Docker Compose for a standard setup, or one-click deploy on Railway. Stack is FastAPI, PostgreSQL, Redis, and Celery.
Who maintains Open Wearables?
Momentum, a healthtech software house with 10 years of experience.
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.
The open-source alternative to every wearable API platform.
Self-hosted. MIT licensed. Full data ownership.