Every peptide vendor we cover, ranked by our independent grade. No vendor pays for placement or a better score. See our methodology →
Cryopep Peptides
Strong independent per-lot COAs and consistently high measured purity.
Veridose Research
Strong independent per-lot COAs and consistently high measured purity.
Krylon Labs
Strong independent per-lot COAs and consistently high measured purity.
Myravyn Sciences
Strong independent per-lot COAs and consistently high measured purity.
Nordipep Therapeutics
Strong independent per-lot COAs and consistently high measured purity.
Octapep Peptides
Strong independent per-lot COAs and consistently high measured purity.
Biolux Chem
Strong independent per-lot COAs and consistently high measured purity.
Cervyn Sciences
Strong independent per-lot COAs and consistently high measured purity.
Evolux Peptides
Strong independent per-lot COAs and consistently high measured purity.
Pyravyn Labs
Strong independent per-lot COAs and consistently high measured purity.
Helixar Labs
Strong independent per-lot COAs and consistently high measured purity.
Aeropep Labs
Strong independent per-lot COAs and consistently high measured purity.
Doxapep Therapeutics
Strong independent per-lot COAs and consistently high measured purity.
Ferapep Labs
Strong independent per-lot COAs and consistently high measured purity.
Ferapep Chem
Strong independent per-lot COAs and consistently high measured purity.
Lentapep Compounds
Strong independent per-lot COAs and consistently high measured purity.
Aeropep Chem
Strong independent per-lot COAs and consistently high measured purity.
Bptide Bio
Strong independent per-lot COAs and consistently high measured purity.
Bptide Compounds
Strong independent per-lot COAs and consistently high measured purity.
Glydon Bio
Strong independent per-lot COAs and consistently high measured purity.
Juvapep Peptides
Strong independent per-lot COAs and consistently high measured purity.
Krylon Chem
Strong independent per-lot COAs and consistently high measured purity.
Lentapep Bio
Strong independent per-lot COAs and consistently high measured purity.
Pyravyn Chem
Strong independent per-lot COAs and consistently high measured purity.
Sylvapep Therapeutics
Strong independent per-lot COAs and consistently high measured purity.
Umbrapep Labs
Strong independent per-lot COAs and consistently high measured purity.
Lumipep Sciences
Strong independent per-lot COAs and consistently high measured purity.
Axopep Bio
Strong independent per-lot COAs and consistently high measured purity.
Doxapep Research
Strong independent per-lot COAs and consistently high measured purity.
Glydon Compounds
Strong independent per-lot COAs and consistently high measured purity.
Hexapep Sciences
Strong independent per-lot COAs and consistently high measured purity.
Ionovyn Research
Strong independent per-lot COAs and consistently high measured purity.
Ionovyn Therapeutics
Strong independent per-lot COAs and consistently high measured purity.
Nordipep Research
Strong independent per-lot COAs and consistently high measured purity.
Qubitpep Bio
Strong independent per-lot COAs and consistently high measured purity.
Qubitpep Compounds
Strong independent per-lot COAs and consistently high measured purity.
Rhenpep Sciences
Strong independent per-lot COAs and consistently high measured purity.
Sylvapep Research
Strong independent per-lot COAs and consistently high measured purity.
Taktyl Peptides
Strong independent per-lot COAs and consistently high measured purity.
Apex Peptides
Apex is one of the strongest vendors we have assessed. Independent per-lot COAs back its purity claims, pricing…
Strandix Sciences
Independent COAs and a solid track record; a dependable mid-tier option.
Doxapep Bio
Independent COAs and a solid track record; a dependable mid-tier option.
Doxapep Compounds
Independent COAs and a solid track record; a dependable mid-tier option.
Evolux Sciences
Independent COAs and a solid track record; a dependable mid-tier option.
Nordipep Compounds
Independent COAs and a solid track record; a dependable mid-tier option.
Cleventa Bio
Independent COAs and a solid track record; a dependable mid-tier option.
Aeropep Research
Independent COAs and a solid track record; a dependable mid-tier option.
Hexapep Labs
Independent COAs and a solid track record; a dependable mid-tier option.
Myravyn Labs
Independent COAs and a solid track record; a dependable mid-tier option.
Octapep Sciences
Independent COAs and a solid track record; a dependable mid-tier option.
Pyravyn Therapeutics
Independent COAs and a solid track record; a dependable mid-tier option.
Qubitpep Peptides
Independent COAs and a solid track record; a dependable mid-tier option.
Zentyra Research
Independent COAs and a solid track record; a dependable mid-tier option.
Theravyn Chem
Independent COAs and a solid track record; a dependable mid-tier option.
Korible Peptides
Independent COAs and a solid track record; a dependable mid-tier option.
Cervyn Chem
Independent COAs and a solid track record; a dependable mid-tier option.
Ferapep Therapeutics
Independent COAs and a solid track record; a dependable mid-tier option.
Juvapep Sciences
Independent COAs and a solid track record; a dependable mid-tier option.
Krylon Therapeutics
Independent COAs and a solid track record; a dependable mid-tier option.
Nordipep Bio
Independent COAs and a solid track record; a dependable mid-tier option.
Rhenpep Labs
Independent COAs and a solid track record; a dependable mid-tier option.
Sylvapep Compounds
Independent COAs and a solid track record; a dependable mid-tier option.
Peptiva Labs
Independent COAs and a solid track record; a dependable mid-tier option.
Glydon Peptides
Independent COAs and a solid track record; a dependable mid-tier option.
Ionovyn Bio
Independent COAs and a solid track record; a dependable mid-tier option.
Myravyn Chem
Independent COAs and a solid track record; a dependable mid-tier option.
Rhenpep Chem
Independent COAs and a solid track record; a dependable mid-tier option.
Umbrapep Research
Independent COAs and a solid track record; a dependable mid-tier option.
Aeropep Therapeutics
Independent COAs and a solid track record; a dependable mid-tier option.
Bptide Peptides
Independent COAs and a solid track record; a dependable mid-tier option.
Cervyn Labs
Independent COAs and a solid track record; a dependable mid-tier option.
Ferapep Research
Independent COAs and a solid track record; a dependable mid-tier option.
Hexapep Chem
Independent COAs and a solid track record; a dependable mid-tier option.
Ionovyn Compounds
Independent COAs and a solid track record; a dependable mid-tier option.
Krylon Research
Independent COAs and a solid track record; a dependable mid-tier option.
Lentapep Peptides
Independent COAs and a solid track record; a dependable mid-tier option.
Pyravyn Research
Independent COAs and a solid track record; a dependable mid-tier option.
Sylvapep Bio
Independent COAs and a solid track record; a dependable mid-tier option.
Taktyl Sciences
Independent COAs and a solid track record; a dependable mid-tier option.
Aminoz Research
Some independent testing but thinner evidence; acceptable with caution.
Quanex Labs
Some independent testing but thinner evidence; acceptable with caution.
Helvar Chem
Some independent testing but thinner evidence; acceptable with caution.
Pepnordic Peptides
Some independent testing but thinner evidence; acceptable with caution.
Cervyn Research
Some independent testing but thinner evidence; acceptable with caution.
Ferapep Compounds
Some independent testing but thinner evidence; acceptable with caution.
Hexapep Research
Some independent testing but thinner evidence; acceptable with caution.
Pyravyn Bio
Some independent testing but thinner evidence; acceptable with caution.
Rhenpep Research
Some independent testing but thinner evidence; acceptable with caution.
Pepvana Bio
Some independent testing but thinner evidence; acceptable with caution.
Bptide Sciences
Some independent testing but thinner evidence; acceptable with caution.
Evolux Labs
Some independent testing but thinner evidence; acceptable with caution.
Evolux Chem
Some independent testing but thinner evidence; acceptable with caution.
Ferapep Bio
Some independent testing but thinner evidence; acceptable with caution.
Juvapep Chem
Some independent testing but thinner evidence; acceptable with caution.
Krylon Compounds
Some independent testing but thinner evidence; acceptable with caution.
Octapep Chem
Some independent testing but thinner evidence; acceptable with caution.
Taktyl Chem
Some independent testing but thinner evidence; acceptable with caution.
Umbrapep Bio
Some independent testing but thinner evidence; acceptable with caution.
Peptelle Sciences
Some independent testing but thinner evidence; acceptable with caution.
Aeropep Compounds
Some independent testing but thinner evidence; acceptable with caution.
Krylon Bio
Some independent testing but thinner evidence; acceptable with caution.
Lentapep Sciences
Some independent testing but thinner evidence; acceptable with caution.
Myravyn Therapeutics
Some independent testing but thinner evidence; acceptable with caution.
Nordipep Peptides
Some independent testing but thinner evidence; acceptable with caution.
Qubitpep Sciences
Some independent testing but thinner evidence; acceptable with caution.
Taktyl Labs
Some independent testing but thinner evidence; acceptable with caution.
Aeropep Bio
Some independent testing but thinner evidence; acceptable with caution.
Cervyn Therapeutics
Some independent testing but thinner evidence; acceptable with caution.
Glydon Sciences
Some independent testing but thinner evidence; acceptable with caution.
Ionovyn Peptides
Some independent testing but thinner evidence; acceptable with caution.
Juvapep Labs
Some independent testing but thinner evidence; acceptable with caution.
Myravyn Research
Some independent testing but thinner evidence; acceptable with caution.
Doxapep Peptides
Some independent testing but thinner evidence; acceptable with caution.
Hexapep Therapeutics
Some independent testing but thinner evidence; acceptable with caution.
Octapep Labs
Some independent testing but thinner evidence; acceptable with caution.
Pyravyn Compounds
Some independent testing but thinner evidence; acceptable with caution.
Rhenpep Therapeutics
Some independent testing but thinner evidence; acceptable with caution.
Sylvapep Peptides
Some independent testing but thinner evidence; acceptable with caution.
Nuvexa Peptides
In-house testing only so the grade is capped at D until independent COAs appear.
Molecula Bio
In-house testing only so the grade is capped at D until independent COAs appear.
Peptora Research
In-house testing only so the grade is capped at D until independent COAs appear.
Hexapep Bio
In-house testing only so the grade is capped at D until independent COAs appear.
Juvapep Research
In-house testing only so the grade is capped at D until independent COAs appear.
Juvapep Therapeutics
In-house testing only so the grade is capped at D until independent COAs appear.
Myravyn Bio
In-house testing only so the grade is capped at D until independent COAs appear.
Myravyn Compounds
In-house testing only so the grade is capped at D until independent COAs appear.
Octapep Research
In-house testing only so the grade is capped at D until independent COAs appear.
Bptide Labs
In-house testing only so the grade is capped at D until independent COAs appear.
Glydon Chem
In-house testing only so the grade is capped at D until independent COAs appear.
Taktyl Therapeutics
In-house testing only so the grade is capped at D until independent COAs appear.
Umbrapep Peptides
In-house testing only so the grade is capped at D until independent COAs appear.
Pepsciq Labs
In-house testing only so the grade is capped at D until independent COAs appear.
Zephyrx Chem
In-house testing only so the grade is capped at D until independent COAs appear.
Cervyn Bio
In-house testing only so the grade is capped at D until independent COAs appear.
Doxapep Sciences
In-house testing only so the grade is capped at D until independent COAs appear.
Evolux Research
In-house testing only so the grade is capped at D until independent COAs appear.
Evolux Therapeutics
In-house testing only so the grade is capped at D until independent COAs appear.
Hexapep Compounds
In-house testing only so the grade is capped at D until independent COAs appear.
Ionovyn Sciences
In-house testing only so the grade is capped at D until independent COAs appear.
Rhenpep Compounds
In-house testing only so the grade is capped at D until independent COAs appear.
Taktyl Research
In-house testing only so the grade is capped at D until independent COAs appear.
Maxavyn Sciences
In-house testing only so the grade is capped at D until independent COAs appear.
Cervyn Compounds
In-house testing only so the grade is capped at D until independent COAs appear.
Nordipep Sciences
In-house testing only so the grade is capped at D until independent COAs appear.
Qubitpep Labs
In-house testing only so the grade is capped at D until independent COAs appear.
NovaPep Labs
See the full scorecard for the criteria breakdown and evidence.
Aeropep Peptides
In-house testing only so the grade is capped at D until independent COAs appear.
Bptide Chem
In-house testing only so the grade is capped at D until independent COAs appear.
Ferapep Peptides
In-house testing only so the grade is capped at D until independent COAs appear.
Glydon Labs
In-house testing only so the grade is capped at D until independent COAs appear.
Krylon Peptides
In-house testing only so the grade is capped at D until independent COAs appear.
Lentapep Labs
In-house testing only so the grade is capped at D until independent COAs appear.
Lentapep Chem
In-house testing only so the grade is capped at D until independent COAs appear.
Octapep Therapeutics
In-house testing only so the grade is capped at D until independent COAs appear.
Pyravyn Peptides
In-house testing only so the grade is capped at D until independent COAs appear.
Qubitpep Chem
In-house testing only so the grade is capped at D until independent COAs appear.
Rhenpep Bio
In-house testing only so the grade is capped at D until independent COAs appear.
Sylvapep Sciences
In-house testing only so the grade is capped at D until independent COAs appear.
Zenith Chem
See the full scorecard for the criteria breakdown and evidence.
Vyntra Research
No verifiable testing and weak trust signals; avoid until proven.
Onpepta Labs
No verifiable testing and weak trust signals; avoid until proven.
Aeropep Sciences
No verifiable testing and weak trust signals; avoid until proven.
Bptide Research
No verifiable testing and weak trust signals; avoid until proven.
Evolux Compounds
No verifiable testing and weak trust signals; avoid until proven.
Glydon Research
No verifiable testing and weak trust signals; avoid until proven.
Krylon Sciences
No verifiable testing and weak trust signals; avoid until proven.
Octapep Compounds
No verifiable testing and weak trust signals; avoid until proven.
Pyravyn Sciences
No verifiable testing and weak trust signals; avoid until proven.
Qubitpep Research
No verifiable testing and weak trust signals; avoid until proven.
Sylvapep Chem
No verifiable testing and weak trust signals; avoid until proven.
Triluxe Chem
No verifiable testing and weak trust signals; avoid until proven.
Bptide Therapeutics
No verifiable testing and weak trust signals; avoid until proven.
Evolux Bio
No verifiable testing and weak trust signals; avoid until proven.
Juvapep Bio
No verifiable testing and weak trust signals; avoid until proven.
Juvapep Compounds
No verifiable testing and weak trust signals; avoid until proven.
Taktyl Compounds
No verifiable testing and weak trust signals; avoid until proven.
Doxapep Labs
No verifiable testing and weak trust signals; avoid until proven.
Hexapep Peptides
No verifiable testing and weak trust signals; avoid until proven.
Lentapep Research
No verifiable testing and weak trust signals; avoid until proven.
Nordipep Chem
No verifiable testing and weak trust signals; avoid until proven.
Octapep Bio
No verifiable testing and weak trust signals; avoid until proven.
Sylvapep Labs
No verifiable testing and weak trust signals; avoid until proven.
Prime Research
See the full scorecard for the criteria breakdown and evidence.
Cortiva Sciences
No verifiable testing and weak trust signals; avoid until proven.
Vantapep Peptides
No verifiable testing and weak trust signals; avoid until proven.
Novexa Bio
No verifiable testing and weak trust signals; avoid until proven.
Cervyn Peptides
No verifiable testing and weak trust signals; avoid until proven.
Doxapep Chem
No verifiable testing and weak trust signals; avoid until proven.
Ferapep Sciences
No verifiable testing and weak trust signals; avoid until proven.
Ionovyn Labs
No verifiable testing and weak trust signals; avoid until proven.
Ionovyn Chem
No verifiable testing and weak trust signals; avoid until proven.
Nordipep Labs
No verifiable testing and weak trust signals; avoid until proven.
Qubitpep Therapeutics
No verifiable testing and weak trust signals; avoid until proven.
Rhenpep Peptides
No verifiable testing and weak trust signals; avoid until proven.
Taktyl Bio
No verifiable testing and weak trust signals; avoid until proven.
Umbrapep Sciences
No verifiable testing and weak trust signals; avoid until proven.
Glydon Therapeutics
No verifiable testing and weak trust signals; avoid until proven.
Lentapep Therapeutics
No verifiable testing and weak trust signals; avoid until proven.
Myravyn Peptides
No verifiable testing and weak trust signals; avoid until proven.