Function Health vs InsideTracker
Function Health is cheaper to start ($365 vs $489 per year, lowest published plans). Function Health scores higher overall (9.0 vs 7.1).
By Julian Caraulani · prices checked
Quick verdict
Our pick between the two: Function Health
Function Health scores 9.0/10 against 7.1 for InsideTracker, ahead on price, clinical care and reputation. InsideTracker can still be the better fit: it is best for data-minded testers who want an app-led action plan and do not need a clinician review.
Side by side
| Function Health | InsideTracker | |
|---|---|---|
| Lowest price | $365/yr (yearly membership, auto-renews) | $489/yr (first year; renews at full retail) |
| Our score | 9.0/10 | 7.1/10 |
| Treatments | Longevity memberships | Longevity memberships |
| Medication in price | Not stated | Not stated |
| Drugs dispensed | Not stated | Not stated |
| Labs | Not stated | Not stated |
| Membership | Not stated | Not stated |
| Insurance | No; self-pay | No; self-pay |
| States | 48 states (not RI, HI), per its own site (2026-10-31) | All 50 states, per its own site (2026-10-31) |
| Cancellation | Cancel and rejoin anytime; no pauses; no refunds for prior payments; auto-renews annually at then-current price. | Membership auto-renews annually at full retail price. Must cancel 30 days before the next billing date. Refunds only within 30 days of purchase/renewal and never after a blood sample is collected. |
| FDA warning letters | None found (October 31, 2026) | None found (October 31, 2026) |
| Trustpilot | 4.5/5 (3,102 reviews) | No profile we could quote |
| Best for | People who want the widest yearly panel, retested twice, in one membership. | Data-minded testers who want an app-led action plan and do not need a clinician review. |
| Prices checked | 2026-10-31 | 2026-10-31 |
Price by treatment
The lowest all-in plan each publishes for the treatments both offer, with the page we read it on.
| Treatment | Function Health | InsideTracker |
|---|---|---|
| Longevity memberships | $365/yr (yearly membership, auto-renews) source, 2026-10-31 | $489/yr (first year; renews at full retail) source, 2026-10-31 |
Function Health: a closer look
Yearly membership: 100+ markers at Quest, a mid-year retest and a clinician summary. We searched the FDA warning-letter database on October 31, 2026 and found no letter naming Function Health.
In its favour
- Measures ApoB, Lp(a), fasting insulin, omega-3 and heavy metals in the base price
- Two draws a year included
- Clinicians review every result
To weigh
- No refunds for prior payments, and membership auto-renews at the then-current price.
- '160+ lab tests' counts the mid-year retest; the annual draw is 100+.
- NY/NJ residents can be billed lab fees on top of the membership, amount not disclosed upfront.
- Not available in Rhode Island, Hawaii or Puerto Rico.
InsideTracker: a closer look
Ultimate blood test plus an algorithm-driven action plan; physician approves the order. We searched the FDA warning-letter database on October 31, 2026 and found no letter naming InsideTracker.
In its favour
- Claims HIPAA compliance and SOC 2 Type II
- Partner labs stated as CLIA-certified
- Mobile draw available everywhere it sells
To weigh
- Highest cost per biomarker of this group: $489 for up to 54 markers is about $9 per marker, and the first year price includes the platform fee that renews.
- 30-day advance cancellation window before renewal, and no refund once blood is drawn.
- Promotional prices apply to the first term only; renewals at full retail.
- Residents of NY, NJ, RI, HI (and AZ per product page) must pay $119 extra for mobile draw.
Which should you choose?
Choose Function Health
Best for people who want the widest yearly panel, retested twice, in one membership. Its lowest all-in plan is $365/yr (yearly membership, auto-renews).
Check Function Health's priceChoose InsideTracker
Best for data-minded testers who want an app-led action plan and do not need a clinician review. Its lowest all-in plan is $489/yr (first year; renews at full retail).
Check InsideTracker's priceFunction Health vs InsideTracker: questions people ask
Is Function Health or InsideTracker cheaper?
Function Health starts lower at $365 per year versus $489 at InsideTracker, comparing each program's lowest all-in plan.
Which is better, Function Health or InsideTracker?
On our published score Function Health rates 9.0 and InsideTracker rates 7.1. Function Health is best for people who want the widest yearly panel, retested twice, in one membership; InsideTracker is best for data-minded testers who want an app-led action plan and do not need a clinician review.
Do Function Health and InsideTracker offer the same treatments?
Function Health: Longevity memberships. InsideTracker: Longevity memberships.
Does either include the medication in the price?
Function Health: not stated. InsideTracker: not stated.
Blood Test Watchdog compares testing services. It is not medical advice, does not interpret results and does not publish reference ranges as advice. Talk to a licensed clinician about which tests you need and what your results mean. Partner links may earn us a commission; our score never depends on it. Compare other programs.