Last reviewed: September 7, 2026
Last updated: September 7, 2026
Written by: Jay Hastings, CEO of PlexusDx
Jay Hastings is the CEO of PlexusDx, a precision health company focused on genetic testing, blood biomarker insights, and personalized wellness recommendations. He has more than 20 years of experience across healthcare innovation, genomics, laboratory operations, healthcare investing, and strategic finance. His work has included scaling healthcare startups, leading CLIA lab integrations, and helping expand consumer access to precision health tools.
Medically reviewed by: Jayden Lee, PharmD, EMBA
Jayden Lee, PharmD, EMBA, is the PlexusDx Medical Science Liaison with a PharmD and MBA specializing in pharmacogenomics and clinical product development, with a proven ability to bridge the gap between genomic research and practical patient outcomes. Dr. Lee has more than 10 years of professional experience in clinical pharmacy, academia, and research.
PlexusDx publishes this comparison and is one of the providers discussed. We use the same evidence rules for our own program and competing programs.
The short answer
Willow offers compounded semaglutide at $299 per month and compounded tirzepatide at $399 per month, billed month-to-month with free two-day shipping and no separate membership fee. Both medications are injection formulations; an oral semaglutide route is advertised but pricing for that route is not itemized on the site. The evidence captured September 4, 2026 documents pricing and medication details but contains minimal service-quality or review data—Willow maintains a Trustpilot profile, but this research pass did not capture rating, volume, or thematic content from user reports. The pricing structure is straightforward: a single monthly charge covers the clinician visit, prescription, medication, and shipping, making it easy to calculate total cost. PlexusDx offers the same compounded medications—semaglutide injection at $189/month and tirzepatide injection at $289/month—a difference of $110 per month ($1,320 annually) on either medication, also with no membership fee and flat-rate pricing at every dose.
Willow vs PlexusDx pricing at a glance
| Feature |
Willow |
PlexusDx |
| Semaglutide injection |
$299/month |
$189/month |
| Tirzepatide injection |
$399/month |
$289/month |
| Semaglutide oral |
Advertised; price unitemized |
$289/month |
| Billing structure |
Month-to-month |
Month-to-month, 3-month, 6-month |
| Membership fee |
$0 |
$0 |
| Shipping |
Free 2-day |
Included |
| HSA/FSA |
Accepted |
Accepted |
| Trustpilot rating |
Profile exists; data not captured |
4.3 stars (79% five-star) |
Willow pricing captured September 4, 2026 from startwillow.com. PlexusDx pricing captured July 17–23, 2026 through checkout verification and confirmed current as of September 4, 2026.
Normalized 12-month cost comparison
Willow bills monthly with no long-term commitment options documented. PlexusDx offers month-to-month, three-month, and six-month prepaid plans with per-month savings on longer terms. The table below shows like-for-like month-to-month costs over one year.
| Medication |
Willow (MTM) |
PlexusDx (MTM) |
12-Month Difference |
| Semaglutide injection |
$3,588/year |
$2,268/year |
PlexusDx saves $1,320 |
| Tirzepatide injection |
$4,788/year |
$3,468/year |
PlexusDx saves $1,320 |
All figures are our calculation: monthly rate × 12. Both providers include clinician visit, prescription, medication, and shipping in the stated price with no separate membership fee. Willow's oral semaglutide pricing was not itemized; readers should confirm the oral-route cost at checkout if that route is preferred.
The $110-per-month difference on either medication is the result of PlexusDx's lower base pricing. Patients on multi-month PlexusDx plans see additional per-month savings: semaglutide injection drops to $169/month on a three-month plan ($2,028 annually) and $149/month on a six-month plan ($1,788 annually), widening the annual gap to $1,800 against Willow's $3,588. Tirzepatide injection on a PlexusDx six-month plan runs $249/month ($2,988 annually), a $1,800 annual difference against Willow's $4,788.
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Willow medication options and routes
Willow advertises compounded semaglutide in both injection and oral routes, and compounded tirzepatide as injection. The $299 semaglutide price and $399 tirzepatide price documented September 4, 2026 are specified for injection routes on the site. Willow's homepage and medication pages reference oral semaglutide availability, but the oral-route per-month cost is not itemized separately—prospective patients should confirm oral pricing during the intake or checkout process if that route is preferred.
All Willow medications are compounded by a licensed pharmacy and prescribed by a clinician following an online consultation. Compounded medications are not FDA-approved. FDA does not review compounded drugs before marketing for safety, effectiveness, or quality. A licensed clinician determines whether a prescription is appropriate for an individual patient.
Service model and support
Willow describes its service as "doctor-guided compounded GLP-1 treatment" with an "all-in treatment model." The pricing structure bundles the clinician consultation, prescription, medication, and two-day shipping into a single monthly charge with no separate membership or subscription fee. Payment is accepted via HSA and FSA accounts. The evidence captured does not document cancellation terms, refund policies, or response-time commitments for clinical support inquiries.
Willow maintains a Trustpilot profile, but this research pass did not capture rating, volume, or thematic content from user reviews. No attributable negative or positive excerpts from Trustpilot or Reddit were documented in the September 4, 2026 evidence set. Prospective patients evaluating service quality should consult current reviews on Trustpilot and independent forums directly.
PlexusDx holds a 4.3-star rating on Trustpilot, with 79 percent of reviews at five stars and 83 percent at four stars or higher, captured September 9, 2026. PlexusDx publishes cancellation and refund terms on its site and includes ongoing clinician messaging and dose-adjustment support in the flat monthly rate.
Choose Willow if…
- You prefer a provider whose pricing and service model you have confirmed independently through current reviews, and the per-month cost fits your budget.
- Free two-day shipping is a priority and you have verified that Willow's delivery timeframe meets your needs.
- You are comfortable with the $299 semaglutide or $399 tirzepatide month-to-month rate and do not require multi-month prepaid savings options.
- You have confirmed the oral semaglutide pricing directly with Willow if that route is your preference, since that figure is not itemized publicly.
Choose PlexusDx if…
- You want the lowest per-month cost on compounded semaglutide injection ($189 month-to-month, $169 on three-month, $149 on six-month) or tirzepatide injection ($289 month-to-month, $269 on three-month, $249 on six-month).
- Saving $110 per month ($1,320 annually) on month-to-month billing, or up to $150 per month ($1,800 annually) with a six-month plan, is material to your decision.
- You value transparent, itemized pricing for oral routes: PlexusDx oral semaglutide is $289/month and oral tirzepatide is $349/month, both published and verified.
- You want a provider with a documented Trustpilot rating (4.3 stars, 83 percent four stars or higher) and published cancellation terms.
- You want flat-rate dosing with no price increase as your clinician adjusts your dose upward over time.
Methodology and freshness
Willow pricing and medication details were captured September 4, 2026 at 13:49:55 UTC from startwillow.com, including the compound-tirzepatide product page and homepage. PlexusDx pricing was captured July 17–23, 2026 through checkout verification and confirmed current as of September 4, 2026. The PlexusDx Trustpilot rating (4.3 stars, 79 percent five-star, 83 percent four stars or higher) was captured September 9, 2026. Willow review data—rating, volume, and thematic content—was not captured in this research pass despite Trustpilot and Reddit URLs being retained; the article advises readers to consult those sources directly.
The 12-month cost calculations are our calculation, derived by multiplying the verified monthly rate by 12. Oral semaglutide pricing for Willow is noted as unitemized based on the September 4 capture; readers should confirm that figure at checkout. No promotional, introductory, or first-month discounted pricing was identified for either provider. Both providers work with licensed compounding pharmacies; neither compounded medication is FDA-approved.
Frequently Asked Questions
Does Willow charge a membership fee in addition to the medication cost?
No. Willow's advertised pricing is all-inclusive: the $299 semaglutide and $399 tirzepatide monthly rates cover the clinician visit, prescription, medication, and free two-day shipping with no separate membership or subscription fee documented in the September 4, 2026 evidence.
How much does Willow's oral semaglutide cost per month?
Willow advertises an oral semaglutide route but does not itemize its monthly cost separately on the site. The $299 semaglutide figure documented September 4, 2026 is specified for injection. Prospective patients should confirm oral-route pricing during intake or checkout if that formulation is preferred.
What is the cost difference between Willow and PlexusDx for semaglutide injection over one year?
On month-to-month billing, Willow semaglutide injection costs $3,588 per year and PlexusDx semaglutide injection costs $2,268 per year, a difference of $1,320 annually or $110 per month. PlexusDx six-month plans reduce the annual cost to $1,788, widening the gap to $1,800 per year. These figures are our calculation based on verified monthly rates.
Are Willow's compounded GLP-1 medications FDA-approved?
No. Compounded medications are not FDA-approved. FDA does not review compounded drugs before marketing for safety, effectiveness, or quality. A licensed clinician determines whether a prescription is appropriate for an individual patient. This disclosure applies to both Willow and PlexusDx compounded semaglutide and tirzepatide.
Where can I read current user reviews of Willow's service and support?
Willow maintains a Trustpilot profile, and discussions appear on Reddit. This article's research pass did not capture rating, volume, or thematic review content for Willow, so we recommend visiting Trustpilot and relevant Reddit threads directly to read current user reports on service quality, support responsiveness, and medication experience before deciding.
Sources
- PlexusDx checkout verification and product pages, captured July 17–23, 2026 and confirmed current September 4, 2026
- Willow homepage (startwillow.com), captured September 4, 2026 at 13:49:55 UTC
- Willow compound-tirzepatide product page (startwillow.com/compound-tirzepatide), captured September 4, 2026 at 13:49:55 UTC
- PlexusDx Trustpilot profile, captured September 4, 2026
- Willow Trustpilot profile URL retained; content not indexed in this pass (September 4, 2026)
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Compounded medication disclosure: Compounded medications are not FDA-approved. FDA does not review compounded drugs before marketing for safety, effectiveness, or quality. A licensed clinician determines whether a prescription is appropriate for an individual patient. PlexusDx works with licensed 503A compounding pharmacies.
Medical and Editorial Standards
Medical review process: This article was reviewed for medical accuracy, scientific clarity, evidence alignment, and appropriate discussion of genetics, medications, supplements, biomarkers, and health-related claims.
Sources and evidence: PlexusDx educational content is developed using peer-reviewed research, clinical literature, reputable medical references, and, where applicable, public health or regulatory guidance. References are included at the end of the article when scientific, medical, or health-related claims are discussed.
Commercial transparency: PlexusDx offers genetic testing, blood biomarker testing, personalized supplement recommendations, and related precision wellness services. Product mentions are intended to help readers understand available options and should not be interpreted as medical advice.
Important disclaimer: PlexusDx educational content is for informational purposes only and should not be used as a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before making decisions about medications, supplements, genetic testing, lab testing, or health-related care.
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