Head-to-head comparison Sahha vs Open Wearables
Open Wearables is a free, MIT-licensed wearable data platform you host and operate yourself. Sahha is a managed API returning five scores, 100+ biomarkers and behavioural archetypes, which keep working from phone signal when a user owns no wearable. The real decision is whether you want to own the infrastructure and the scoring logic, or want those handled for you.
Last verified: July 2026 · every competitor claim linked at its source
Choose Sahha if
- You want a managed platform, not infrastructure to operate
- Your users include people with no wearable
- You need a vendor accountable for uptime, support and a BAA
- You want scoring validated on published research
Choose Open Wearables if
- Cost must stay flat at very large scale
- Data cannot leave your own infrastructure
- A regulator or ethics board must audit the scoring line by line
- You accept the ops burden to remove all vendor risk
Who each one actually reaches
Both platforms collect comparable data. What differs is who operates the pipeline, and how much of it exists on day one.
Install your app and grant health permission once.
You get- Five scores, 100+ biomarkers and 100+ archetypes
- Working from phone sensors alone, with no wearable involved
- Plus any of 800+ devices they already own
82% to 97%
Smartphone ownership across surveyed markets.
Own a wearable from one of the supported providers.
You get- Ten documented providers, eight of them direct cloud OAuth
- Open scoring code you can read and modify
- A deployment your team runs and keeps running
13% to 46%
Wearable ownership across surveyed markets.
Neither column is cheaper in the abstract. Self-hosting trades a per-user fee for engineering time and on-call responsibility, which is a good trade at large scale or under data residency rules, and a poor one for a small team shipping a product.
Sahha vs Open Wearables, line by line
The criteria that most often decide this purchase. Every Open Wearables cell links to their own documentation, dated.
| Criterion | Sahha | Open Wearables |
|---|---|---|
| What does it cost to run in production? | Sahha 30-day free trial, then $299/mo billed annually for 1,000 users. No infrastructure to run. | Open Wearables No licence fee. Their own estimate for production infrastructure is $200 to $500/month, which does not include the engineering time to operate it. Open Wearables FAQ · verified Jul 2026 |
| Who runs the infrastructure? | Sahha Sahha does. Nothing to deploy or keep patched. | Open Wearables You do. PostgreSQL, Redis, Celery workers, a FastAPI backend and a React frontend, plus your own developer credentials with each provider. Open Wearables architecture · verified Jul 2026 |
| What derived output comes back? | Sahha 5 scores, 100+ biomarkers, 100+ behavioural archetypes, 75+ tags and 100+ insights, on every plan. | Open Wearables Their pricing page describes it as "basic health scoring algorithms (sleep, resilience)", and their compare page states health scoring is in active development. Open Wearables pricing · verified Jul 2026 |
| Can I segment users by behaviour? | Sahha Yes. 100+ archetypes such as sleep chronotype and activity consistency. | Open Wearables No archetype, tag or insight library appears in their documentation as of July 2026. Open Wearables docs · verified Jul 2026 |
| Does Apple Health work today? | Sahha Yes. Apple HealthKit is a production collection path. | Open Wearables Their documentation marks the Apple Health mobile SDK as "coming soon", while their marketing pages count Apple Health among supported providers. Open Wearables providers · verified Jul 2026 |
| Can I read and change the scoring logic? | Sahha No. Sahha’s models are proprietary, though the research behind them is published. | Open Wearables Yes. Every algorithm is MIT-licensed and modifiable. Open Wearables pricing · verified Jul 2026 |
| Where does health data live? | Sahha On Sahha infrastructure, under a DPA. | Open Wearables On yours. Self-hosting removes a sub-processor from your GDPR chain rather than adding one. Open Wearables FAQ · verified Jul 2026 |
| Is it HIPAA compliant out of the box? | Sahha HIPAA and GDPR compliant, with DPA and BAA from the Pro tier. | Open Wearables They state Open Wearables is not HIPAA-certified as a product and that compliance is the deployer’s responsibility. A BAA is Enterprise-only. Open Wearables FAQ · verified Jul 2026 |
| Is there a SOC 2 report? | Sahha Yes. | Open Wearables They state SOC 2 certification is not currently pursued for Open Wearables as an open-source project. Open Wearables FAQ · verified Jul 2026 |
| Can I fork it and keep it forever? | Sahha No. | Open Wearables Yes. MIT licence, commercial use and resale permitted, and the code keeps working regardless of what happens to the vendor. Open Wearables pricing · verified Jul 2026 |
Open Wearables details reflect publicly available documentation as of July 2026, linked per row above. Product details change, so if something here is out of date, tell us and we'll correct it.
Where Open Wearables fits better
Four situations where self-hosting is the right answer. None of them are edge cases.
Cost has to be flat at scale
No per-user fee, ever. At very large user counts with infrastructure already in place, the cost curve is flat where any per-seat model is not.
Open Wearables pricing · verified Jul 2026Data cannot leave your infrastructure
Self-hosting removes a sub-processor from the GDPR chain instead of adding one. For some EU and public-sector reviews that is decisive whatever a DPA says.
Open Wearables FAQ · verified Jul 2026You need to show your working
Facing an ethics board or regulator, walking through a score line by line beats a better score you cannot explain. No closed model offers that.
Open Wearables repo · verified Jul 2026You want no vendor risk at all
The database is yours and the MIT licence is irrevocable. The code outlives the vendor, which matters in a category that has seen several acquisitions and shutdowns.
Open Wearables pricing · verified Jul 2026Outside those four, you are choosing whether pipeline maintenance is work your team should be doing at all.
Moving between self-hosted and managed
Both directions are possible and neither is free. The costs are worth naming before you commit either way.
- Open Wearables liveSahha livenew signups → Sahha
Start on the free trial while the stack still runs
Build against Sahha’s sandbox on the 30-day free trial without decommissioning anything. The comparison you want is your own data through both, and nothing requires turning the self-hosted deployment off.
- A
Allow “your app”
ConnectSleepActivityHeart rateRe-consent is unavoidable in either direction
Provider authorizations belong to the connection that created them, so users reauthorize whether they are moving to Sahha or away from it. This is the single largest cost of any move in this category and no vendor can remove it.
- Sleep · last 30 days backfilled30d ago today
Scores will not match, and should not be expected to
Sahha and Open Wearables compute different scores from different models, so historical values will not line up. Plan for a visible discontinuity in any trend chart your product already shows, or re-baseline at the switch.
- # one webhook consumer POST /sahha/webhook { "profileId": …, "scores": […] }
Export stays available
Sahha exports your data on request, and the MIT licence means an Open Wearables deployment cannot be taken away from you. Neither choice is a one-way door, which is the reasonable thing to verify before making it.
The decision that actually matters here is not the migration, it is whether you want to operate the infrastructure. Everything else is a few weeks of work in either direction.
Sahha vs Open Wearables, answered
How much does Sahha cost at 10,000 users?
$1,499 per month billed annually, on the Pro tier, which includes every feature plus DPA and BAA. Sahha’s pricing is published in full: Free, $299/mo for 1,000 users, $1,499/mo for 10,000, then custom. Some third-party comparisons describe Sahha’s pricing as "custom" or estimate several thousand dollars per month at this volume. The published figures are on our pricing page.
Is self-hosting actually free?
The licence is. The infrastructure is not, and neither is the engineering time. Open Wearables estimates $200 to $500 per month in infrastructure for a production startup, and separately notes that you obtain your own developer credentials from each provider, several of which require programme approval that can take weeks. Whether that totals less than a managed subscription depends entirely on what your engineering hours are worth.
How many providers does each support?
Open Wearables documents ten providers, of which eight are direct cloud OAuth connections. Sahha reaches 800+ devices through Apple HealthKit and Google Health Connect, plus a growing set of direct cloud connections. The two count different things, so the honest comparison is by the specific sources you need rather than by headline number.
Does Open Wearables support Apple Health?
Their documentation marks the Apple Health mobile SDK as "coming soon" as of July 2026, while listing Apple Health among supported providers on their marketing pages. A bulk XML import path exists, which is not the same as live sync. Worth checking their current docs before assuming either way, since this is exactly the kind of thing that changes.
Can I move from one to the other later?
In both directions, with effort. Sahha exports your data and the MIT licence means Open Wearables cannot be taken away from you. The cost in either direction is re-consenting users for provider connections, which is the same wherever you go in this category.
All Open Wearables information on this page reflects publicly available documentation as of July 2026, linked at the point of each claim. Product details change. If something here is out of date or inaccurate, email support@sahha.ai and we will correct it. Trademarks are the property of their respective owners. Sahha is not affiliated with, endorsed by, or sponsored by Open Wearables.
Try the managed version first.
Run the managed version on your own users first. If self-hosting still looks better after that, you will at least know exactly what you are replacing.
Free for 30 days · No credit card · No sales call
- Sandbox profiles with months of history, so you can build before your first real user
- Runs alongside your current provider, with no cutover
- 25 development users, every product unlocked
- DPA and BAA from Pro, at a published price