Head-to-head comparison Sahha vs Terra
Terra API connects server-side to roughly 88 wearable clouds, and every score it returns requires wearable-grade signals like HRV. Sahha reads the phone itself alongside 800+ devices, so scores keep working for users who own no wearable. In most markets that is the majority.
Last verified: July 2026 · every competitor claim linked at its source
Choose Sahha if
- You have users to serve who own no wearable
- An empty dashboard for phone-only users is unacceptable
- You want scoring and a BAA without an Enterprise contract
- You want to read the research before trusting a score
Choose Terra if
- Your users span many wearable brands and you ship no app
- You need live in-session streaming during workouts
- You need clinical lab panels or test ordering
- You want raw signal to model yourself
Who you can actually score
Both platforms read Apple Health and Health Connect, so both collect from a phone. The difference is what comes back when that phone is all a user has.
Carry a phone. A wearable adds detail, but nothing waits on one.
You get- Five scores, 100+ biomarkers and 100+ archetypes
- Computed from phone sensors when that is all a user has
- Richer detail from any of 800+ devices they own
82% to 97%
Smartphone ownership across surveyed markets.
Own a wearable. Terra reads phone data too, but their docs state no score computes from step count alone.
You get- Normalized metrics from roughly 88 clouds and the OS health stores
- A scoring layer their marketing describes as 6 validated scores
- Several also need a 7 to 30 day baseline before they compute
13% to 46%
Wearable ownership across surveyed markets.
Terra collects from phones as readily as Sahha does, and its cloud path reaches users who never install your app at all, which is the right trade for a product without one. The ceiling is on the analysis, not the ingestion: Terra’s scores return null without their physiological inputs, so a phone-only user arrives as metrics rather than as a scored profile.
Sahha vs Terra, line by line
The criteria that most often decide this purchase. Every Terra cell links to their own documentation, dated.
| Criterion | Sahha | Terra |
|---|---|---|
| Can I get health scores without paying extra? | Sahha Yes. Every score, biomarker and archetype, on every plan and the free trial. | Terra No. Health Scores add $499/mo to the $399/mo plan, so $898/mo. Terra pricing · verified Jul 2026 |
| Can I evaluate before paying? | Sahha Yes. Free for 30 days, 25 users, all features. | Terra No. $399/mo billed annually, with a 30-day money-back guarantee. Terra pricing · verified Jul 2026 |
| Do users need a wearable? | Sahha No. Sleep, activity and mental wellbeing all score from phone signal alone. | Terra Yes in practice. Every documented score needs wearable-derived inputs; their docs say a score “will not be generated or may return as null” without them. Terra score inputs · verified Jul 2026 |
| Can I segment users by behaviour, not just score them? | Sahha Yes. 100+ behavioural archetypes such as sleep chronotype and activity consistency. | Terra No archetype or lifestyle classification layer is mentioned in Terra's docs or marketing as of July 2026. Terra scores docs · verified Jul 2026 |
| What research is published behind the scoring? | Sahha 2,068 participants, 26,888 PHQ-9 responses, Otago ethics 21/074, with Prof Nathan Berg. Methods, limitations and collaborators published. | Terra Population research including a Nature Portfolio paper. Scores called validated, with no study named. Terra health scores · verified Jul 2026 |
| How do I get a signed BAA? | Sahha From the Pro tier, at a published $1,499/mo. No sales call. | Terra A signed BAA is listed as an Enterprise inclusion. It is not listed on the Quick Start plan. Terra pricing · verified Jul 2026 |
| Can I pull data when the user has not installed my app? | Sahha Yes for 4 providers including Garmin, Oura, and WHOOP, via direct cloud connections. Every other source arrives through the SDK in your app. | Terra Yes. Roughly 88 of Terra's enumerated integrations are direct server-to-server cloud connections. Terra integrations · verified Jul 2026 |
| Can I stream live sensor data during a workout? | Sahha No. Sahha delivers via webhooks and REST, not sub-second streaming. | Terra Yes. Sub-second over BLE and ANT+, with a WearOS SDK. Terra streaming · verified Jul 2026 |
| Can I ingest clinical lab biomarkers? | Sahha No. Sahha's biomarkers are behavioural and physiological, not clinical lab panels. | Terra Yes. The Lab Reports API standardises 4,100+ biomarkers with roughly 1,900 mapped to LOINC. Terra lab reports · verified Jul 2026 |
| Can I order blood tests through the same API? | Sahha No. | Terra Yes. Vantage API orders blood and DNA kits, returns FHIR. UK and USA. Terra Vantage · verified Jul 2026 |
Terra 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 Terra fits better
Four situations where Terra is the right answer. One of them is structural rather than a matter of degree.
You need broader direct cloud coverage
Terra enumerates roughly 88 direct server-to-server integrations. Sahha connects directly to 4 providers including Garmin, Oura, and WHOOP and is growing that list. If you cannot rely on users installing your app, Terra's breadth is the clearest reason to pick it.
Terra integrations reference · verified Jul 2026You need live in-session data
Sub-second latency over BLE and ANT+, with a WearOS SDK. For live workout feedback or in-session monitoring, Sahha has no equivalent.
Terra streaming docs · verified Jul 2026You need clinical lab data or test ordering
4,100+ lab biomarkers with roughly 1,900 mapped to LOINC, plus test-kit ordering returning FHIR. Sahha’s biomarkers are behavioural and physiological, not clinical panels.
Terra biomarker reference · verified Jul 2026You want the raw signal to model yourself
Unsmoothed sample-level time series and raw FIT capture, writing straight to S3, Postgres or Kafka. If you are building your own models, that beats a scoring layer.
Terra data destinations · verified Jul 2026Outside those four, the deciding question is your user base. If most of your users own no wearable, Terra returns metrics where Sahha returns a scored profile.
What switching from Terra actually costs
The honest version, including the part that is genuinely painful. Nothing here requires a cutover date or a frozen roadmap.
- Terra liveSahha livenew signups → Sahha
Run both at once
No cutover dateAdd the Sahha SDK alongside your Terra integration and point new signups at Sahha. Nothing is switched off, and if a contract still has months to run this is usually cheaper than an early exit.
- A
Allow “your app”
ConnectSleepActivityHeart rateBudget for re-consent
The hard partProvider authorizations cannot transfer between vendors. Every user has to authorize again, and no tooling on either side changes that. The cost is identical in any direction, including away from Sahha.
- Sleep · last 30 days backfilled30d ago today
Migrated users arrive with history
AutomaticUp to 30 days is retrieved the moment a user connects, so personalization keeps working through the switch instead of cold-starting every migrated user.
- # one webhook consumer POST /sahha/webhook { "profileId": …, "scores": […] }
Map one payload, not each provider
One handlerBoth platforms normalize into their own schema, so this is a remapping job rather than a parsing one. Existing Terra destinations keep receiving data until you retire them.
Sahha vs Terra, answered
Is Sahha cheaper than Terra?
At entry level yes, and the gap widens with scoring. Sahha Starter is $299/mo billed annually for 1,000 users with every feature included. Terra Quick Start is $399/mo billed annually and lists Health Scores as an add-on from $499/mo, so $898/mo for the same job, covering roughly 500 active authentications on their published credit rates. Sahha is free for 30 days with nothing paid up front; Terra’s equivalent is a 30-day money-back guarantee, which means paying $399 first and asking for it back. Both figures are from the vendors’ own pricing pages, retrieved July 2026.
Does Terra support Apple Health and Health Connect?
Yes. Terra’s Mobile SDK connects Apple Health, Samsung Health, and Google Fit or Health Connect, and Terra documents these as the only integrations the Mobile SDK is used for. So a mobile SDK reading the phone health stores is not a Sahha-only capability. The difference is emphasis: for Terra it is one path among many, and for Sahha it is the collection model.
Can Sahha work without a wearable?
Yes. Sleep, activity and mental wellbeing all score from smartphone signal alone, with mental wellbeing carrying full factor coverage from the phone, and biomarkers include values inferred from phone sensors rather than read from a device. Every Terra score requires HRV, resting heart rate, respiratory rate, SpO2 or sleep stages, which in practice come from a wearable.
Which one should I use for a clinical or regulated product?
It depends on which part is regulated. Terra offers FHIR output, lab biomarker standardisation with LOINC codes, and test-kit ordering through Vantage, none of which Sahha has. Sahha offers DPA and BAA from its Pro tier, where Terra lists a signed BAA as an Enterprise inclusion. If you need clinical lab interoperability, Terra. If you need behavioural signal with a BAA below enterprise pricing, Sahha.
Can I use both?
Yes, and some teams do. The architectures are complementary rather than overlapping: Terra for direct wearable cloud connections and clinical lab data, Sahha for phone-derived behavioural and mental health signal. The cost question is whether two vendors is worth it versus accepting one set of gaps.
All Terra 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 Terra.
Compare them on your own data.
Point it at your own users and see what comes back, including the ones who own no wearable.
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