Best Alternatives to Open Wearables in 2025
Open Wearables offers a unique open-source, self-hosted API for wearable health data, with built-in health scoring and AI reasoning. However, if you're looking for a managed service, broader device coverage, or different pricing models, several strong alternatives exist. Below are the best options to consider, each with its own strengths in the health data aggregation space.
Terra
Terra is the most direct competitor, offering a unified API for over 100 wearable and health devices. It provides a fully managed, cloud-hosted solution with robust data normalization, webhooks, and a developer-friendly dashboard. If you prefer not to self-host and want quick integration with extensive device support, Terra is a top choice.
Merge
Unified API for B2B integrations
Merge is a leading unified API platform that goes beyond wearables to include EHRs, HRIS, and other health data sources. It excels in enterprise-grade integrations, with strong compliance (HIPAA, SOC 2) and a focus on B2B health products. If your product needs to connect to multiple health systems, not just wearables, Merge offers a broader scope.
TrueFoundry AI Gateway
While not a direct wearable API, TrueFoundry AI Gateway is a strong alternative for teams building AI-powered health products. It provides a unified gateway for multiple AI models, with features like routing, caching, and observability. If your primary need is AI reasoning over health data (similar to Open Wearables' MCP server), this gateway can complement or replace that layer, especially if you're already using multiple LLMs.
Eden AI
Eden AI is an aggregation platform for AI APIs, not specifically for wearables. However, it can be a useful alternative if you want to build health insights using various AI services (e.g., NLP, image recognition) on top of raw wearable data. It simplifies access to many AI providers, which might be beneficial if your health product relies heavily on AI features beyond just data aggregation.
Fitbit Web API
For products focused exclusively on Fitbit devices, the official Fitbit Web API is a reliable, well-documented alternative. It offers deep access to Fitbit data (activity, sleep, heart rate) with OAuth 2.0. While it lacks multi-device support, it's free and stable, making it a good choice for niche products that don't need cross-platform compatibility.
Apple HealthKit
If your target audience is iOS users, Apple HealthKit is the native, most comprehensive option. It provides granular access to health and fitness data from iPhone and Apple Watch, with strong privacy controls. It's not a cross-platform solution, but for iOS-only products, it offers the best data quality and user experience.
Google Health Connect
Health Connect is Google's official platform for aggregating health data across Android apps and devices. It provides a standardized API for reading and writing health data, with user consent management. If your product is Android-first or needs to integrate with a wide range of Android health apps, this is a solid, free alternative.
The best alternative to Open Wearables depends on your priorities. For a fully managed, multi-device API, Terra is the closest match. For broader health data integration (including EHRs), Merge is superior. If AI capabilities are your main focus, consider TrueFoundry AI Gateway or Eden AI. For single-ecosystem products, native APIs like Fitbit, HealthKit, or Health Connect are reliable and cost-effective. Evaluate your needs for hosting, device coverage, compliance, and AI features to make the right choice.