Function Health vs InsideTracker (2026): lab membership vs analysis platform
Last updated September 3, 2026.
The short version: similar goals, different architecture. Function is all-in: $365 per year includes the actual lab tests (160+ annually). InsideTracker's $149 per year membership buys the analysis platform, with blood testing priced separately on top.
Price: Function lists $365 per year, all-in for 160+ lab tests across two annual testing rounds. InsideTracker lists membership at $149 per year for platform access, with test products sold separately and extras like the InnerAge biological-age calculation at $99 per calculation. Winner on all-in cost clarity: Function. Winner on entry price if you bring your own lab results: InsideTracker, since the platform can analyze third-party blood work.
Testing scope: Function's 160+ tests are bundled and standardized. InsideTracker's scope depends on which test products you buy or upload; it notes that biomarkers on third-party reports outside its panels will not be analyzed. Winner on bundled breadth: Function.
Interpretation: InsideTracker's strength is the recommendation engine: personalized, science-backed advice, healthspan category scores, and its published claim that 80% of customers improve at least one at-risk biomarker. Function counters with clinician review of every result and trend tracking. Winner on coaching software: InsideTracker. Winner on included clinician review of the labs themselves: Function.
Verdict: Best for one predictable price covering tests plus interpretation: Function Health. Best for people who already get blood work through their doctor and want a smarter analysis layer at lower entry cost: InsideTracker.
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Function wins for all-in bundled testing at $365; InsideTracker wins as a $149 analysis layer over labs you already have.
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Common questions
Is InsideTracker cheaper than Function Health?
At entry, yes: $149 per year versus $365. But the $149 buys the platform, not the blood tests, which are priced separately, so the true comparison depends on which test products you add. If you already get annual labs through your doctor, InsideTracker can analyze those (within its supported biomarker list) and stays cheaper. If you want the tests included, Function's $365 all-in is cleaner.
Can InsideTracker use lab results from my own doctor?
Yes, with a caveat from its own membership page: it analyzes the biomarkers in its supported list, and third-party results outside that list will not be analyzed or shown on your dashboard. For standard panels, coverage is good; exotic markers may not carry over.
What does Function include that InsideTracker does not?
The blood tests themselves: 160+ lab tests annually across two testing rounds at 2,000+ labs or with at-home options, plus clinician review of results, all inside the $365. InsideTracker unbundles testing from analysis.
Which gives better recommendations?
InsideTracker has the longer track record as a recommendation engine, with healthspan scores and published customer-outcome stats (80% improving at least one at-risk biomarker, per its site). Function's pitch is breadth plus clinician review and trend tracking. If software-driven coaching is the draw, InsideTracker; if medical-review framing is, Function.
Which should I pick if I already have good insurance?
Possibly neither at full bundle: ask your doctor to order the targeted labs your history actually warrants, often covered, then use InsideTracker's cheaper platform layer for interpretation if you want it. Function's bundle makes most sense for people whose insurance path to comprehensive testing is blocked or annoying.