October 2026 issue · Editors' star ratings, never reader reviews · How we rate
Rated.Peptides

A buyer's magazine for research peptide suppliers

Head to head · October 2026

Atomik Labz or Koi Peptides?

On our stars Koi Peptides comes out ahead, 3.6 to 2.0. Koi Peptides lets you open its certificates before you order; Atomik Labz does not, and for a first order that gap matters more than any price. Only Atomik Labz lists the reference vial, so we cannot call the price question. Both take cards.

2.0 / 5
Editors’ rating, not reader reviews
Paperwork1.3
Company1.2
Price3.6
Shopping3.1
3.6 / 5
Editors’ rating, not reader reviews
Paperwork4.1
Company3.2
Price3.3
Shopping3.5

At a glance

Atomik Labz

  • StatusTrading
  • BasedUS
  • Trading sinceNot published
  • Outside laboratoryLimited
  • Laboratory namedNone
  • Certificates open to allNo
  • Certificates per lotNot verified
  • Reference vial$40
  • Free shipping fromNot stated
  • Ways to paycrypto, card
  • Ships abroadNot verified
  • ShelfNot counted; vials, capsules, bulk
  • FDA letterNone on record

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
  • ShelfNot counted; vials
  • FDA letterNone on record

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

Reader questions

So, Atomik Labz or Koi Peptides?

On our stars Koi Peptides comes out ahead, 3.6 to 2.0. Koi Peptides lets you open its certificates before you order; Atomik Labz does not, and for a first order that gap matters more than any price. Only Atomik Labz lists the reference vial, so we cannot call the price question. Both take cards. The widest gap between them is in paperwork, where Koi Peptides leads.

Can I read a certificate from each before I order?

At Atomik Labz the certificates are not posted where you can read them. At Koi Peptides the certificates are open to anyone and each one is tied to a lot.

Are these reader reviews?

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