Function Health vs InsideTracker
Function Health vs InsideTracker: Function is both cheaper and much broader. It's $365 a year for 114 biomarkers drawn twice, versus InsideTracker's Ultimate panel at $499 for 48 markers, one time. That's $3.20 per biomarker against $10.40. If you're buying raw data, Function wins by a wide margin. InsideTracker's pitch was never panel size, it's the recommendation engine and the athlete focus.
I've tested Function Health myself and reviewed InsideTracker in detail. To keep the counts honest I pulled each provider's current list and normalized the marker names, since the same test is often spelled three different ways.
Below: pricing and cost per biomarker, the exact tests each includes and where they diverge, who founded each company and whether a doctor is on the team, and the apps.
Function Health vs InsideTracker: pricing
| Function Health | InsideTracker | |
|---|---|---|
| Price | $365 | $499 |
| Cadence | Twice per year (Annual: 100+ tests, Follow-up: 60+ tests) | On-demand (pay per test, discounted with membership) |
| Biomarkers | 114 | 48 |
| Cost per biomarker | $3.20 | $10.40 |
Cost per biomarker is the sticker price divided by the number of markers, a rough apples-to-apples figure. It ignores cadence, the app, and any doctor review, which the sections below cover.
Function Health vs InsideTracker: biomarkers compared
Function Health's Annual Membership covers 114 biomarkers and InsideTracker's Ultimate covers 48. They share 40. 74 are unique to Function Health and 8 are unique to InsideTracker.
Only in Function Health (74)
- ABO Blood Group
- Albumin/Globulin Ratio
- Alkaline Phosphatase
- Amylase
- Anti-Mullerian Hormone (AMH)
- Anti-Nuclear Antibodies Pattern
- Anti-Nuclear Antibodies Titer
- Antinuclear Antibodies (ANA)
- Arachidonic Acid/EPA Ratio
- Biological Age
- BUN (Blood Urea Nitrogen)
- BUN/Creatinine Ratio
- Carbon Dioxide (CO2)
- Chloride
- Cholesterol/HDL Ratio
- Creatinine
- eGFR (Estimated Glomerular Filtration Rate)
- Follicle Stimulating Hormone (FSH)
- Free T3 (Triiodothyronine)
- Free T4 (Thyroxine)
- Globulin
- Homocysteine
- Large HDL Particles
- LDL Particle Number
- LDL Pattern
- LDL Peak Size
- Lead
- Leptin
- Lipase
- Lipoprotein (a)
- Luteinizing Hormone (LH)
- Mean Corpuscular Volume (MCV)
- Medium LDL Particles
- Mercury
- Methylmalonic Acid
- Non-HDL Cholesterol
- Omega-3 DHA
- Omega-3 DPA
- Omega-3 EPA
- Omega-3 Total
- Omega-6 Arachidonic Acid
- Omega-6 Linoleic Acid
- Omega-6 Total
- Omega-6/Omega-3 Ratio
- Prolactin
- PSA Free
- PSA Percent Free
- PSA Total
- Rheumatoid Factor
- Selenium
- Small LDL Particles
- Thyroglobulin Antibodies
- Total Bilirubin
- Uric Acid
- Urine Amorphous Sediment
- Urine Appearance
- Urine Bacteria
- Urine Bilirubin
- Urine Blood
- Urine Calcium Oxalate Crystals
- Urine Color
- Urine Glucose
- Urine Hyaline Casts
- Urine Ketones
- Urine Leukocyte Esterase
- Urine Nitrite
- Urine pH
- Urine Protein
- Urine Red Blood Cells
- Urine Specific Gravity
- Urine Squamous Epithelial Cells
- Urine White Blood Cells
- Urine Yeast
- Zinc
Only in InsideTracker (8)
- Creatine Kinase (CK)
- Fasting Insulin
- Folate
- Mean Corpuscular Hemoglobin (MCH)
- Mean Corpuscular Hemoglobin Concentration (MCHC)
- Progesterone
- RBC Magnesium
- Vitamin B12
Show the 40 biomarkers both include
- Alanine Aminotransferase
- Albumin
- Apolipoprotein B
- Aspartate Aminotransferase
- Basophils
- Calcium
- Cortisol
- DHEA-Sulfate
- Eosinophils
- Estradiol (E2)
- Ferritin
- Free Testosterone
- Gamma-Glutamyl Transferase
- Glucose
- HDL Cholesterol
- Hematocrit
- Hemoglobin
- Hemoglobin A1c
- High-Sensitivity C-Reactive Protein
- Iron
- Iron Saturation
- LDL Cholesterol
- Lymphocytes
- Magnesium
- Mean Platelet Volume (MPV)
- Monocytes
- Neutrophils
- Platelet Count
- Potassium
- Red Blood Cell Count
- Red Cell Distribution Width (RDW)
- Sex Hormone Binding Globulin (SHBG)
- Sodium
- Thyroid-Stimulating Hormone
- Total Cholesterol
- Total Iron Binding Capacity
- Total Testosterone
- Triglycerides
- Vitamin D (25-Hydroxy)
- White Blood Cell Count
Function Health vs InsideTracker: founders and team
Function Health
Doctor on founding team? Yes
- Founded: 2021
- Funding: $800M+ raised; $450M growth financing (Jul 2026, General Catalyst's Customer Value Fund) on top of a $298M Series B (Nov 2025, led by Redpoint) at a $2.5B valuation
- Founders:
- Jonathan Swerdlin — Co-founder & CEO
- Mark Hyman, MD — Co-founder & Chief Medical Officerphysician
- Pranitha Patil — Co-founder & COO
- Mike Nemke — Co-founder & CTO
Physician co-founder Mark Hyman, MD is a functional-medicine doctor and serves as Chief Medical Officer.
InsideTracker
Doctor on founding team? No
- Founded: 2009
- Funding: ~$17.5M raised; $15M Series B (2022, led by PeakBridge)
- Founders:
- Gil Blander, PhD — Founder & Chief Scientific Officer
Founded by biologist Gil Blander, PhD (not a physician), with scientists from Harvard, MIT, and Tufts. Legal entity Segterra.
Function Health vs InsideTracker: apps and technology
| Function Health | InsideTracker | |
|---|---|---|
| iOS app | ✓ | ✓ |
| Android app | ✓ | ✓ |
| Web app | ✓ | ✓ |
| Trained its own AI model | Announced a "Medical Intelligence" AI product (Nov 2025), but disclosed no model, paper, or architecture | — |
- Function Health: Function markets Medical Intelligence as proprietary AI, but has published no model card, paper, or named provider. It reads as an orchestration/RAG layer over existing LLMs plus its biomarker data; a genuine trained foundation model can't be verified from public sources.
- InsideTracker: Markets a "proprietary AI engine" (machine learning plus computational biology), but hasn't announced a self-trained foundation model.
Function Health vs InsideTracker: which is better?
If you want the most biomarkers for your money, Function is the clear pick: it costs less and covers more than twice the markers. InsideTracker earns its higher price a different way, by turning your results into a specific action plan for nutrition, supplements, and training, tuned to athletic goals, which is the part Function leaves to its app.
Check the biomarker breakdown above before deciding. InsideTracker carries 8 markers Function skips, including fasting insulin, vitamin B12, folate, and progesterone, so if those matter to you it's not a pure numbers game. See our Function Health biomarker list for the full panel.