Head to head · October 2026
Koi Peptides vs Peptide Warehouse
Koi Peptides scores higher, 72 to 61. The widest gap is transparency. Same formula, same data fields, October 2026.
Factor by factor
| Factor | Koi Peptides | Peptide Warehouse | Edge |
|---|---|---|---|
| Testing & certificates | 82 | 82 | Even |
| Documentation depth | 65 | 63 | Koi Peptides |
| Transparency | 86 | 40 | Koi Peptides |
| Track record | 40 | 11 | Koi Peptides |
| Catalog | 48 | 70 | Peptide Warehouse |
| Pricing | 65 | 69 | Peptide Warehouse |
| Ordering & service | 90 | 80 | Koi Peptides |
Fact sheets side by side
| Koi Peptides | Peptide Warehouse | |
|---|---|---|
| Overall score | 72/100 (#7) | 61/100 (#20) |
| Status | Operating | Operating |
| Based in | Sheridan, WY (registered address); warehouses Austin, TX and Long Beach, CA | US |
| Founded | 2022 | Not stated |
| Third-party testing | Yes | Yes |
| Laboratories named | Freedom Diagnostics | Freedom Diagnostics |
| Public certificates | Yes | Yes |
| Lot-specific certificates | Yes | Yes |
| Formats | vials | vials, blends |
| Catalog size | — | ≈55 |
| BPC-157 5 mg listed price | — | $52.99 |
| Free shipping from | $200 | $299 |
| Payments | card, ach, wire | card, zelle, crypto |
| Ships internationally | Yes | No |
| Research-use disclaimer | Yes | Yes |
| FDA warning letter | None found | None found |
Read the full reviews: Koi Peptides · Peptide Warehouse. Both suppliers sell materials labeled for laboratory research use only.
Frequently asked questions
Which is better, Koi Peptides or Peptide Warehouse?
On our formula Koi Peptides scores higher (72 vs 61). The largest gap is in transparency (86 vs 40). "Better" depends on what you weight; both fact sheets are on this page.
Do both publish certificates of analysis?
Koi Peptides: yes. Peptide Warehouse: yes. Lot-specific certificates — Koi Peptides: yes; Peptide Warehouse: yes.
Which is cheaper?
We could not compare a like-for-like listing; price tiers are mid (Koi Peptides) and mid (Peptide Warehouse).