Head-to-head · WeighScore
Arc-1 vs Rivas Medical Weight Loss
The verdict
Arc-1 takes it — 56.3/100 to 55.6/100, but only just.
Arc-1 grades higher on WeighScore, our editorial score across cost value, dose & formulation, clinical oversight, labs & monitoring, fulfillment and contract terms. Arc-1 offers compounded semaglutide (from $249.99) and compounded tirzepatide (from $299.99) as per-dose purchases, not monthly subscriptions. Rivas Medical Weight Loss is close behind and may still be the better fit — see the factor split below.
We may earn a commission if you start care through some of these links, at no extra cost to you. It never moves the WeighScore, which is the weighted average of the six factors shown for every provider, and what we write about a provider is the same either way. See our disclosure.
Factor by factor
The same six graded dimensions, side by side. See the methodology.
The numbers
| Metric | Arc-1 | Rivas Medical Weight Loss |
|---|---|---|
| WeighScore | 56.3/100 | 55.6/100 |
| Grade | C | C |
| Scorecard rank | #416 | #437 |
| Semaglutide | $200/mo (0.5 mg dose, compounded) | Not disclosed |
| Tirzepatide | $200/mo (2.5 mg dose, compounded) | Not disclosed |
| Coverage | Coverage not published | 3 states |
| Brand-name access | Compounded only | Compounded only |
| Oral / sublingual | Injection only | Injection only |
Graded #416 · C
Strengths
- Both compounded semaglutide and tirzepatide available
- Per-dose purchasing — no subscription or membership required
- 25% off plus free shipping promotion
- Broader longevity formulary (rapamycin, NAD+, sermorelin)
- LegitScript Certified badge now displayed on product pages
Where it loses points
- No legal entity name or address disclosed
- State availability not disclosed
- No named clinicians or pharmacy partners
- Per-dose pricing still climbs with dose (semaglutide 2.5mg is $549.99/mo, tirzepatide 7.5mg $399.99/mo)
Graded #437 · C
Strengths
- Physician-founded (Paul Rivas MD) with 15 clinics plus telehealth
- Flat price for any dose; weekly provider visits included in every payment
- Offers both compounded semaglutide and tirzepatide
Where it loses points
- Expensive: about $498/mo for semaglutide and $715/mo for tirzepatide (billed weekly)
- Only available in Maryland, Virginia, and Florida
- Weekly-visit concierge model requires more frequent engagement than mail-order
Also worth a look
Neither is our top-graded pick — CoreAge Rx leads the scorecard
Across all 499 providers, CoreAge Rx grades highest at 91.8/100 (A−). Top of the scorecard: flat transparent pricing, both molecules, nationwide — no teaser-rate games.
Pricing/verification reflect each provider's public disclosures at last grading; the WeighScore is our editorial judgment per the methodology. Prices change — confirm on each provider's site. Not medical advice; see our disclosure.