Rated Peptides
Compare · October 2026

Koi Peptides vs Paramount Peptides

Paramount Peptides scores higher, 7.2 to 7.1 out of 10. Both let you open a certificate before you spend anything, so certificates will not separate them. Koi Peptides takes cards and Paramount Peptides does not, which settles it if you want chargeback rights.

Updated 2026-10-19 · Editorial scores, not user reviews

7.1
Editors' scoreGood · #5 of 49Editorial score, not user reviews.
Quality8.2
Trust6.3
Value6.5
Experience6.9
7.2
Editors' scoreGood · #4 of 49Editorial score, not user reviews.
Quality8.8
Trust7.0
Value6.5
Experience6.2

At a glance

The same facts for both, side by side.

Koi Peptides

  • StatusTrading
  • BasedSheridan, WY (registered address); warehouses Austin, TX and Long Beach, CA
  • Trading since2022
  • Outside laboratoryYes
  • Laboratory namedFreedom Diagnostics
  • Certificates open to allYes
  • Certificates per lotYes
  • Reference vialNot listed
  • Free shipping from$200
  • Ways to paycard, ach, wire
  • Ships abroadYes
  • CatalogNot counted; vials
  • FDA letterNone on record

Paramount Peptides

  • StatusTrading
  • BasedIrvine, CA
  • Trading since2012
  • Outside laboratoryYes
  • Laboratory namedJanoshik
  • Certificates open to allYes
  • Certificates per lotYes
  • Reference vialNot listed
  • Free shipping from$500
  • Ways to payNot stated
  • Ships abroadNo
  • CatalogAbout 78; vials, capsules, blends
  • FDA letterNone on record

Both companies sell materials labeled for laboratory research use only. Full reviews: Koi Peptides · Paramount Peptides.

Questions

So, Koi Peptides or Paramount Peptides?

Paramount Peptides scores higher, 7.2 to 7.1 out of 10. Both let you open a certificate before you spend anything, so certificates will not separate them. Koi Peptides takes cards and Paramount Peptides does not, which settles it if you want chargeback rights. The widest gap is in trust, where Paramount Peptides leads.

Can I read a certificate from each before I order?

Koi Peptides posts certificates anyone can open, each tied to a lot. Paramount Peptides posts certificates anyone can open, each tied to a lot.

Are these user reviews?

No. Both scores come from our published formula applied to facts on each supplier’s own pages and in public records. Nobody can submit a rating here.