OPS Peptide Science vs Peptide Partners
Across the 20 products both vendors stock, OPS Peptide Science has the lower effective price per mg on 1 and Peptide Partners on 19. OPS Peptide Science lists 89 tracked listings across 46 products; Peptide Partners lists 113 across 21. On certificates of analysis the in-stock products we track rate none found at OPS Peptide Science and broad at Peptide Partners. Based on the certificates our crawler found; vendors may publish more than we index. These are price and document observations, not quality ratings, and neither vendor is endorsed.
OPS Peptide Science is a research-peptide vendor that lists 89 injectable peptides, including GHK-Cu, Tirzepatide and Retatrutide.
- Price vs market median
- 57% above market
- Tracked catalog
- 46 products · $$$
- Cheaper on
- 1 of 20 shared
- COA coverage
- None found
Peptide Partners is a US research-peptide vendor based in Sarasota, FL that lists 86 injectable peptides.
- Price vs market median
- 3% above market
- Tracked catalog
- 21 products · $$
- Cheaper on
- 19 of 20 shared
- COA coverage
- Broad
Vendor facts
Dashes mark facts we have not recorded yet. Vendor-stated details come from each storefront and can change without notice. Facts for Peptide Partners were extracted from the vendor's site and not yet reviewed by us.
Certificates on file
Coverage rates how many of the in-stock products we track have a certificate our pipeline read and matched to a catalog peptide. Based on the certificates our crawler found; vendors may publish more than we index. We do not test products, and a certificate cannot show authenticity, chain of custody or sterility.
Carried by one vendor only
Only at OPS Peptide Science
26 products the other vendor does not list
- Melanotan II$5.50
- NAD+$0.20
- Pinealon$5.80
- Selank$8
- TB-500$17.50
- Thymosin Alpha-1$20
- ACE-031$200
- Adipotide$43
Prices shown are per mg for the cheapest in-stock listing we track.
Questions
- Is OPS Peptide Science cheaper than Peptide Partners?
- On the 20 products both vendors stock, OPS Peptide Science has the lower effective price per mg on 1 and Peptide Partners on 19. Each side uses the cheapest in-stock listing we track for that product, after any public discount code, and prices change often.
- How much COA coverage does each vendor have?
- OPS Peptide Science: none found. Peptide Partners: broad, newest test dated 2026-09-17. Based on the certificates our crawler found; vendors may publish more than we index. We do not test products ourselves, and a certificate cannot prove authenticity or sterility.
- What does each vendor carry?
- OPS Peptide Science has 46 priced products in the current index and Peptide Partners has 21, 20 of which appear on both catalogs. 26 products are listed only by OPS Peptide Science and 1 only by Peptide Partners.