Peptide vendor comparisons
Vendors people often weigh against each other, compared on the same public evidence we use everywhere: six transparency checks, certificates of analysis (COAs), domain history, shipping, enforcement actions, and daily prices on the peptides both sell. Last checked Oct 15, 2026.
How pairs are chosen: we compare vendors that people search for together, once we have enough data on both (prices for at least three of the same peptides, or most of the transparency checks for each). Neither vendor pays to appear, and a comparison never declares a winner on quality: we haven't lab-tested these vendors, so the pages compare openness and price, not purity.
| Comparison | Transparency scores | Peptides priced at both | Cheaper on more of them |
|---|---|---|---|
| American Peptides vs Blank Peptides | 47 vs 55 | — | |
| American Peptides vs NextGenPeps | 47 vs 57 | 2 | — |
| American Peptides vs Peptide Plugs | 47 vs 57 | 30 | Peptide Plugs (24 of 30) |
| American Peptides vs PS Peptides | 47 vs 22 | 29 | PS Peptides (27 of 29) |
| American Peptides vs Swiss Chems Caution | 47 vs 72 | 21 | Even on price |
| Blank Peptides vs NextGenPeps | 55 vs 57 | — | |
| Blank Peptides vs Peptide Plugs | 55 vs 57 | — | |
| Blank Peptides vs PS Peptides | 55 vs 22 | — | |
| Certified Peptides vs Licensed Peptides | 60 vs 62 | 18 | Licensed Peptides (10 of 18) |
| NextGenPeps vs Peptide Plugs | 57 vs 57 | 2 | — |
| NextGenPeps vs PS Peptides | 57 vs 22 | 2 | — |
| NextGenPeps vs Swiss Chems Caution | 57 vs 72 | 2 | — |
| Orbitrex Peptides vs Peptide Partners Caution | 73 vs 55 | 8 | Peptide Partners (7 of 8) |
| Peptide Plugs vs PS Peptides | 57 vs 22 | 30 | Peptide Plugs (21 of 30) |
| Peptide Plugs vs Swiss Chems Caution | 57 vs 72 | 21 | Peptide Plugs (17 of 21) |
| PS Peptides vs Swiss Chems Caution | 22 vs 72 | 25 | PS Peptides (18 of 25) |
"Caution" means one or both vendors have documented red flags or were named in an enforcement action in the past three years; we don't rank or recommend those vendors.
Peptides compared
Comparing compounds rather than vendors? These guides set two peptides side by side: what each is, how the evidence compares and their legal status by market, with sources.
- BPC-157 vs TB-500
- CJC-1295 DAC vs No DAC (Mod GRF 1-29)
- CJC-1295 vs Sermorelin
- Ipamorelin vs Sermorelin
- Melanotan 1 vs Melanotan 2
- MGF vs PEG-MGF
- MOTS-c vs SS-31
- PT-141 vs Melanotan 2
- Selank vs Semax
- Sermorelin vs Tesamorelin
Want a comparison we don't have?
Email [email protected] with the two vendors. We add a pair when both are in our vendor list with enough checked data to compare fairly. Until then, each vendor's profile shows its full evidence, its prices against the market and the live alternatives that score higher. For a ranked shortlist instead of a head-to-head, see the best peptide vendors, the vendors that publish third-party COAs and the cheapest vendors by price index.