Calibrate vs Willow: Which GLP-1 Provider Is Better?

By Iacob Pastina, Independent Researcher & Publisher

Reviewed & updated August 14, 2026 · Cites primary sources (FDA, NEJM, CMS) · Not medical advice

54 providers verified independently·Independent research·How we rank →

Short answer: Calibrate scores higher on our rubric, 7.7/10 against 7.5/10. Full reasoning, pricing and the cases where the other one wins are below.

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Calibrate beats Willow overall, scoring 7.7/10 vs 7.5/10. Published pricing is not a like-for-like monthly comparison: Calibrate is published $199/mo; total not verified; Willow is from $299/mo. Choose Calibrate for users who want a physician-led metabolic health program with a 3-month commitment and a weight-loss guarantee. Choose Willow for users who want comprehensive clinical support with flexibility between injectable and oral compounded semaglutide routes.

A side-by-side look at Calibrate and Willow to help you decide. We compare them on:

•Starting price per month
•Our overall score, out of 10
•Medication type, brand-name or compounded
•Whether they accept insurance
•Who each one is best for

Higher Rated

Calibrate

#16 of 54

7.7/10

Metabolic health company offering a physician-led program restructured in 2026: a $199/mo program fee with a 3-month minimum commitment (no more $1,649 one-time enrollment fee), plus separately billed medication. The program includes nutrition coaching, labs, a smart scale, and a 10%+ weight-loss guarantee with 50% money-back.

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Willow

#20 of 54

7.5/10

Personalized GLP-1 weight loss with ongoing clinical support. Compounded semaglutide and tirzepatide only, Willow explicitly does not prescribe brand-name Wegovy or Zepbound. Added oral compounded semaglutide tablets as a non-injectable option.

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Feature	Calibrate	Willow
Why each one	Physician-led metabolic program with a 10%+ weight-loss guarantee and 50% money-back, one of the few programs backing outcomes with a cash guarantee.	One of the few compounded-only platforms offering both injectable and daily oral semaglutide tablets, useful for users who want a non-injectable option without leaving the GLP-1 compounded category.
Our Score	7.7/10	7.5/10
Headline Price	published $199/mo; total not verified	from $299/mo
Medication Type	Both	Compounded
Insurance Accepted	Yes	No
Best For	Users who want a physician-led metabolic health program with a 3-month commitment and a weight-loss guarantee	Users who want comprehensive clinical support with flexibility between injectable and oral compounded semaglutide routes
Watch out for	$597 upfront (3-month commitment) is a meaningful barrier vs. month-to-month competitors	Compounded-only, no brand-name Wegovy or Zepbound through the platform
Ranking	#16	#20
Get started	Visit Calibrate	Visit Willow

Pros & Cons Compared

Calibrate

Pros

+2026 pricing rewrite, $199/mo program fee with a 3-month commitment ($597 upfront), then month-to-month; the old $1,649 one-time enrollment fee was removed
+Board-certified physicians with metabolic health specialization lead treatment
+10%+ body-weight-loss guarantee with 50% money-back if not met
+Includes labs, nutrition coaching, personalized smart scale, and sleep/exercise support

Cons

−$597 upfront (3-month commitment) is a meaningful barrier vs. month-to-month competitors
−Medication cost is separate and varies significantly by payer route
−Fewer medications in the menu than larger marketplaces like Ro or Found
−Onboarding still takes 2-3 weeks to complete baseline labs and treatment plan

Willow

Pros

+Includes monthly provider check-ins and dose adjustments at no extra cost
+Offers both injectable AND oral compounded semaglutide, one of few platforms with a daily oral tablet option
+$299/mo all-in for compounded semaglutide with monthly provider support
+90%+ patient retention rate after 3 months per their published outcomes data

Cons

−Compounded-only, no brand-name Wegovy or Zepbound through the platform
−Tirzepatide pricing reaches $499-$524 at higher doses, starting dose is $399/mo
−Cash-pay only, no insurance billing, though they provide superbills for FSA/HSA
−Founded in 2024, less track record than Ro or Hims, though growth has been fast

Our Verdict

Calibrate edges out Willow with a score of 7.7/10 vs 7.5/10. Published pricing is not a like-for-like monthly comparison: Calibrate is published $199/mo; total not verified; Willow is from $299/mo. Calibrate accepts insurance, which can significantly reduce your out-of-pocket costs. Calibrate offers both brand-name and compounded medications, giving you more flexibility.