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VendorCOA

Peptide vendor tier list: Core Peptides leads tier A

As of Oct 21, 2026, the top tier occupied is A (Core Peptides 83, True Peptides 75), out of 11 ranked research-peptide vendors scored on lot-matched COAs, independent lab tests, FDA record and policies.

Last verified Oct 21, 2026 · rubric · open data
  1. S85-100
    No vendor in this band.
  2. A75-84
    Core Peptides83True Peptides75
  3. B65-74
    Penguin Peptides74Ascension Peptides70Biotech Peptides70Swiss Chems70SWISS10DRYPtides65
  4. C55-64
    99 Purity Peptides60NEW15Core Research Peptides60Spartan Peptides60
  5. D0-54
    Atomik Labz50AUTUMN

Tier = score band. Click a vendor for its line-by-line score, sources and prices. Codes shown are verified vendor codes; ours is labelled affiliate.

Not tiered

DRYPtides is tier B (65/100): the vendor we plan to partner with, scored like everyone else. DRYPtides coupon code

View DRYPtides' catalog and COAs ↗

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Questions

What is the best tier in the peptide vendor tier list?

As of Oct 21, 2026, the top tier occupied is A (Core Peptides 83, True Peptides 75), out of 11 ranked research-peptide vendors scored on lot-matched COAs, independent lab tests, FDA record and policies.

How are tiers assigned?

Each tier is a band of our published 100-point score: S 85+, A 75-84, B 65-74, C 55-64, D 0-54. The score comes only from verified facts; tiers are labels on it.

Can a vendor pay to move up a tier?

No. Scores are computed from the published data file by a fixed formula; payment, sponsorship and commission can't change them. Every score change is dated in the public change log.

Why are some vendors missing from the tiers?

Amino Asylum, Limitless Life (Limitless Biotech), Modern Aminos, Peptide Partners, Peptide Sciences, Simple Peptide, Strate Labs are listed but not ranked: closed, catalog behind a login, or not yet reviewed.

Do you earn from any vendor here?

We're setting up an affiliate relationship with DRYPtides; no link on this site earns a commission yet, which sits in tier B at 65/100.