Rocket Fuel vs Function Health (2026): the honest comparison

At a glance

Function Health — The biggest US lab-testing membership (500k+ members, co-founded with Dr. Mark Hyman): 100+ biomarkers twice a year with an excellent dashboard.Here's how the two stack up on the things that actually change outcomes.

What matters

Rocket Fuel

Function Health

Who reads your results

A physician reads every report, writes your plan, and sees you in consults

A clinician writes an asynchronous summary 1–2 weeks after results; members often call it generic

Doctor consults

Included in the membership

Not included — no 1:1 consult and no ongoing doctor-patient relationship (a doctor calls only for urgent values)

The plan between tests

Recalibrates every 28-day cycle from your adherence and any retests

Protocols (beta): app-generated plans that adapt from your data — no clinician manages them, and Function says they aren't medical advice

Testing cadence

Baseline panel included; retests are add-ons your physician recommends per cycle

Twice a year: a full panel, then a fixed ~60-marker retest at ~6 months

Biomarkers

100+ biomarkers mapped

100+ biomarkers on the initial draw; ~60 retested mid-year (marketed as 160+ tests/year)

Price

India-first membership pricing with testing, consults, and the protocol included

$365/year (≈₹32,000); add-on tests, scans, and state surcharges extra

Available in India

Yes — at-home sample collection in Bangalore

No — US only, via Quest Diagnostics locations

Where Rocket Fuel pulls ahead

A physician relationship, not a PDF: every report is read by a doctor who writes the plan and meets you — Function explicitly offers no 1:1 consults
A physician-managed protocol recalibrated every 28 days — Function's Protocols are app-generated and, per Function's own terms, not medical advice
Interpretation is done with you, not left to you — Function's own advice is to take your results to your doctor; Rocket Fuel is the doctor
Recalibration doesn't wait for a blood draw — cycles adjust monthly from adherence, with retests as targeted add-ons
Actually available in India, with at-home collection instead of lab visits

Where Function Health shines

Enormous value on raw testing — rebuilding its 100+ marker panel a la carte would cost $1,100+ (≈₹97,000+)
Best-in-class dashboard and trend tracking, with a 4.9-star app across iOS and Android
Twice-yearly testing included, so you see markers move within the membership year
Serious ecosystem: Protocols (beta) with daily targets, wearable sync (Oura, Fitbit, Apple Health), full-body MRI via Ezra, and 100+ add-on tests at member pricing

The full picture

Data company vs care company

Function Health is honest about what it is: a data product. You get a very large panel, a superb dashboard, per-marker explainer pages, and a downloadable PDF designed to be taken to your own doctor. Its clinicians write a summary but don't diagnose, don't prescribe, and don't meet you. Half a million people find that valuable — as a data layer, it's excellent.

But the hard part of health isn't seeing the numbers; it's changing them. That requires someone accountable for your plan. Rocket Fuel's answer is structural: a physician reads every report, builds the protocol, and adjusts it with you in included consults. You're not handed a PDF and a reading list.

What happens between draws

Function tests twice a year — a full panel, then a fixed ~60-marker retest around month six. Its Protocols feature (in beta since late 2025) turns those results into app-generated nutrition, fitness, and supplement plans, and Function says they adapt as your habits and connected-device data evolve. What doesn't change between draws is the clinical picture: the blood data anchoring the plan refreshes twice a year, no clinician manages the protocol, and Function's own terms state it doesn't offer medical advice, diagnosis, or treatment.

Rocket Fuel treats the gap between tests as the product. Each 28-day cycle closes with a recalibration: your adherence, your retests, your physician's next set of calls. Twelve adjustments a year instead of two snapshots.

The real cost of 'affordable'

$365 (≈₹32,000) for Function's panel is genuinely good value on testing alone. The friction shows up after: members are frequently surprised that add-on tests cost extra, MRI scans are $899 (≈₹79,000), New York and New Jersey carry surcharges, and acting on results means either self-navigating or paying your own doctor to interpret someone else's lab work.

Rocket Fuel's membership includes the layer Function charges you to find elsewhere: physician interpretation, consults, and a managed protocol. The testing is the beginning of the service, not the end of it.

The India question

Function Health operates through Quest Diagnostics in the United States and has no presence in India. There is no way to be a Function member from Bangalore.

Rocket Fuel was built for India from day one — at-home phlebotomy in Bangalore, protocols designed around Indian food and routines, and pricing set for this market.

Frequently asked

Is Function Health available in India?

No. Function Health tests exclusively through Quest Diagnostics locations in the US. In India, Rocket Fuel offers a 100+ biomarker membership with at-home collection in Bangalore and physician consults included.

Does Function Health include a doctor consultation?

No — Function provides an asynchronous clinician-written summary, and its doctors don't diagnose, prescribe, or hold consults (they call only for urgent values). Rocket Fuel includes physician consults, and a physician writes every plan.

How is Rocket Fuel's protocol different from Function Health's Protocols?

Function's Protocols (in beta) are app-generated plans built from your labs, habits, and connected devices — Function states they aren't medical advice, and no clinician manages them per member. Rocket Fuel's protocol is written and recalibrated every 28 days by the physician who reads your reports, with consults included.

Function Health tests 160+ biomarkers — is that more than Rocket Fuel?

Function's '160+' counts the initial 100+ panel plus a ~60-marker mid-year retest. Rocket Fuel maps 100+ biomarkers and recalibrates the plan every 28 days, with physician-recommended retests as add-ons — so the numbers you have get acted on far more often.

Who should pick Function Health over Rocket Fuel?

If you live in the US, already have a doctor you trust to interpret labs, and mainly want the biggest possible dataset with a great dashboard — Function is a strong pick. If you want the interpretation, the plan, and the follow-through included (or you live in India), that's Rocket Fuel.

More comparisons

The Rocket Fuel difference

A physician on your plan. A plan that never goes stale.

Function Health hands you data. Rocket Fuel hands you a clinician-built protocol that recalibrates every 28 days — with the testing, consults, and daily follow-through built in.

Get started with Rocket Fuel

Rocket Fuel vs Function Health