Terra vs Vital (Junction): Health-Data APIs Compared (2026)

If you are choosing between Terra and Vital for health data, the short answer is: pick Vital (now Junction) if you need wearables data AND US lab or at-home diagnostics in one integration, and pick Terra if you want the widest wearable and provider coverage plus CGM and nutrition in its normalized schema. Both are server-side aggregators that normalize hundreds of wearables (exact counts are marketing figures) through a single API, and both can also ingest Apple HealthKit and Android Health Connect data through their mobile SDKs. One important housekeeping note first: Vital rebranded to Junction in 2025 after an $18M raise, so you will see both names in the wild. This page uses "Vital/Junction," and the docs now live under junction.com while the older tryvital domain still resolves.

How Terra and Vital/Junction compare

Both products solve the same core problem — one integration instead of a separate build per wearable — so the decision comes down to three things:

• Scope of data. This is the real fork in the road. Terra focuses on breadth of wearable and health-app coverage with a rich normalized model. Vital/Junction covers wearables too, but its differentiator is bundling that wearable data WITH US at-home and lab diagnostics (at-home kits, walk-in centers, mobile phlebotomy) in the same API. If you need labs, that decides it.
• Provider coverage and schema depth. Terra advertises the widest provider list and a normalized schema that includes CGM/glucose and nutrition alongside the usual activity, sleep, heart rate, and HRV. If your product leans on continuous glucose or nutrition data across many devices, that breadth matters.
• Pricing model. Both charge recurring fees, but the shape differs. Terra uses a subscription plus usage (credit-based) model, where cost scales with connected users and event volume. Vital/Junction uses per-user, usage-based pricing with a monthly minimum. Model your expected volume against each before you commit. All dollar figures shift often — verify current pricing in each vendor's docs.

One thing they share: for some providers (for example Garmin, Whoop, Dexcom, Strava, Samsung Health) you may still need to register your own developer or partner credentials with that provider, regardless of which aggregator you pick.

Terra vs Vital/Junction at a glance

Terra

Terra is best when you want the widest wearable and health-app coverage behind a single integration, with a normalized schema that goes deep on metrics like CGM/glucose and nutrition. It is a server-side REST API with webhooks, plus mobile SDKs for pulling on-device Apple Health and Health Connect data, and it brokers per-user OAuth-style connections so you do not build each provider auth flow yourself. Data comes back in one normalized model spanning activity and workouts, sleep with stages and latency, heart rate and HRV, VO2max, SpO2, nutrition, body composition, menstrual cycle, and glucose. The trade-off to know: pricing is subscription plus usage on a credit model, so your bill scales with the number of connected users and the volume of events — model that carefully before committing, and verify current pricing in Terra's docs.

Vital / Junction

Vital/Junction is best when your product needs BOTH wearable data and diagnostics — lab tests and at-home kits — in a single integration, which is exactly its differentiator versus a wearables-only aggregator. Remember the rebrand: Vital became Junction in 2025 after an $18M raise, so the same product appears under both names and the current docs live at junction.com. It offers a server-side REST API with webhooks and mobile SDKs for wearable data across a wide device range, and on top of that it can order lab tests and return structured results through at-home kits, walk-in centers, and mobile phlebotomy. Pricing is per-user and usage-based with a monthly minimum, with higher tiers adding custom OAuth credentials and dedicated support. The trade-off to know: the lab and diagnostics features are US-focused, so if your users are outside the US that half of the value does not apply — and because branding is mid-transition, double-check you are reading the current junction.com docs. Verify current pricing before you build.

Which should you pick?

Recommend by use-case rather than crowning a single winner:

• If you need lab or at-home diagnostics alongside wearable data (longitudinal care, screening, anything that combines a blood panel with wearable trends) → pick Vital/Junction. Bundling wearables with US diagnostics in one API is the thing it does that Terra does not, but confirm your users are in the US, since the lab side is US-focused.
• If you want the widest wearable and provider coverage, or you lean on CGM/glucose and nutrition across many devices → pick Terra for its breadth and rich normalized schema. Just model your volume against the credit-based pricing first.
• If you are US-based and unsure which way your product will grow → Vital/Junction lets you start with wearables and add diagnostics later without a second integration, while Terra keeps you widest on the pure-wearable side. Match the choice to whether labs are on your roadmap.

Either way, both let you ingest HealthKit and Health Connect through their SDKs, so on-device Apple and Android data is available regardless of which you choose.

Watch the fine print

Pricing models, credit and per-user rates, monthly minimums, and provider coverage counts in this category change often. Every dollar figure above is intentionally left as "verify current pricing," and the coverage numbers each vendor advertises are marketing figures — directionally useful, but confirm them against the live integrations and pricing pages (tryterra.co and junction.com) before you commit, especially at scale.