Best for: Laboratories and research institutions
Best for: Wholesale research peptide buyers
Best for: Wholesale and private-label buyers
Best for: Research laboratories and volume buyers
Best for: Laboratories and biotech companies
Best for: Laboratories, brands, and distributors
Best for: Research laboratories and institutions
Only suppliers with enough verified evidence are given a rank. Suppliers below the evidence bar are listed further down, unranked.
A quick side-by-side of the #1 position against the next suppliers on this page, using the same verified criteria we apply to every supplier. Full evidence and sources are on each company profile.
| Koi Research Labs LLC | Peptide Technologies | |
|---|---|---|
| Location | Sheridan, Wyoming, USA | United States |
| Testing checks | 7 of 7 | 6 of 7 |
| Wholesale | Yes · 50 vials minimum | Yes · 100 mg minimum |
| PAL score | 9.4/10 | 9.1/10 |
| Koi Research Labs LLC | PeptideTech | |
|---|---|---|
| Location | Sheridan, Wyoming, USA | United States |
| Testing checks | 7 of 7 | 6 of 7 |
| Wholesale | Yes · 50 vials minimum | Yes · 100 mg minimum |
| PAL score | 9.4/10 | 9.0/10 |
| Koi Research Labs LLC | Kylo Peptides | |
|---|---|---|
| Location | Sheridan, Wyoming, USA | Sheridan, Wyoming, USA |
| Testing checks | 7 of 7 | 7 of 7 |
| Wholesale | Yes · 50 vials minimum | Yes |
| PAL score | 9.4/10 | 9.0/10 |
| Koi Research Labs LLC | NeuroPept Ltd | |
|---|---|---|
| Location | Sheridan, Wyoming, USA | Rotterdam, Netherlands |
| Testing checks | 7 of 7 | 6 of 7 |
| Wholesale | Yes · 50 vials minimum | Not confirmed |
| PAL score | 9.4/10 | 9.0/10 |
Ordered by Peptide Ad Lab score.
| # | Supplier | Based in | COAs / testing | Wholesale | Score | |
|---|---|---|---|---|---|---|
| 1 | Koi Research Labs LLC | Sheridan, Wyoming, USA | Yes | Yes | 9.4 | Profile |
| 2 | Peptide Technologies | United States | Yes | Yes | 9.1 | Profile |
| 3 | PeptideTech | United States | Yes | Yes | 9.0 | Profile |
| 4 | Kylo Peptides | Sheridan, Wyoming, USA | Yes | Yes | 9.0 | Profile |
| 5 | NeuroPept Ltd | Rotterdam, Netherlands | Yes | Not confirmed | 9.0 | Profile |
| 6 | LIANTAO Peptide | China | Yes | Yes | 8.9 | Profile |
| 7 | Wholesale Research Peptides | Queensland, Australia | Yes | Yes | 8.8 | Profile |
These companies match this page but have not published enough verifiable information for us to rank them. We list what we could verify and do not estimate the rest.
Peptide Xplorations manufactures bulk and wholesale research peptides for laboratories and businesses in the United States.
Trusty Peptide supplies research-grade lyophilized peptides tested for minimum 98 percent purity with certificates of analysis.
Peptides Bio supplies lyophilized peptide compounds for in-vitro laboratory research and academic study applications.
Alpine Labs provides online research-grade synthesized peptides, custom peptide synthesis, and bulk ordering services globally.
Stablize Peptides offers research formats, bulk raw materials, and custom synthesis services for B2B procurement.
The company supplies synthetic research peptides and custom synthesis services for scientific research.
Atlas BioLabs supplies wholesale and custom peptides sourced from manufacturing partners in China.
Bulk RUO Peptides supplies research-use-only peptides in wholesale kits and bulk quantities to verified businesses.
Pharma Inventor provides contract chemistry research, analytical testing, and custom peptide synthesis services.
Schafer-N provides custom peptide synthesis and high-density peptide microarray services for researchers.
Biosyntan provides custom peptide synthesis, modified peptides, and analytical services for research applications.
Atura Research supplies wholesale research peptides and custom synthesis services for U.S. laboratories and formulators.
Peptivara manufactures and supplies catalog and custom pharmaceutical-grade peptides for research and biotech applications globally.
Aurchain Biotech supplies peptide raw materials, research peptides, cosmetic peptide ingredients, and custom synthesis services.
AAPPTec provides peptide synthesis reagents, automated synthesizers, and custom peptide manufacturing services for research and industrial production.
Peptide 2.0 offers custom peptide synthesis, library generation, and high-throughput production services for researchers.
CASLO provides custom synthetic peptides and modification services utilizing Fmoc solid-phase synthesis for the research community.
Kinexus provides proteomics, bioinformatics, and custom peptide and antibody services for biomedical researchers.
The company supplies wholesale research-grade peptides in bulk kits with batch-specific certificates of analysis.
NovaChain Bio supplies cosmetic peptides, research materials, and custom synthesis services for B2B buyers.
SunGlobal Peptides supplies wholesale research peptides to verified B2B distributors, compounding pharmacies, and research institutions.
AurexonBio supplies peptide raw materials, custom synthesis solutions, and OEM packaging for business buyers worldwide.
The company provides bulk research peptides and custom OEM manufacturing with direct wholesale pricing and batch testing.
Methodology
Every supplier is scored on the same seven dimensions, and the overall score is calculated from those dimensions — it is never assigned by hand. Where a supplier has not published something, we record it as not confirmed: an information gap is excluded from the calculation rather than scored as a zero, and we never infer a capability a company has not stated.
Manufacturing capability is weighted up on this page because it is what a custom-synthesis buyer is choosing on.
Each supplier is assessed against a published set of criteria covering business transparency, testing and documentation, wholesale capabilities, manufacturing capabilities, website experience, commercial purchasing and fulfillment. Assessments use publicly available information: the company's own website, published documentation, and publicly stated programs. Where something cannot be confirmed, it is shown as not confirmed rather than counted against the supplier.
Suppliers can purchase sponsored visibility, such as a featured placement on a comparison page or a sponsored position on a comparison page. Those placements are always clearly labelled as sponsored. Payment does not create, change or influence a Peptide Ad Lab editorial score. Where a comparison page includes a sponsored position, it carries a visible "Sponsored placement" label, and every other position on the page follows editorial score order.
Custom synthesis is the production of a specific peptide sequence to order, rather than from a catalogue. Buyers typically supply the sequence and required purity, and the supplier quotes on scale, purity grade, modifications and lead time. Analytical documentation such as HPLC and mass spectrometry data is normally part of the deliverable.