Peptide vendor ratings compared: Finnrick, Peptigrity, PeptideBenchmark, Peptide Critic, PeptIQ and others

Peptide vendor ratings: two kinds of site

Rating sites send buyers to vendors and labs, so their methods matter. They split into two groups:

• Sites that test. Finnrick collects samples and sends them to partner labs. VialAudit and ChemVerify buy products and have them tested.
• Sites that score paperwork. Peptigrity, PeptideBenchmark, Disclosed Labs, Merit Verified, PeptIQ and PeptideTrust score COAs that vendors or buyers already paid for.

Peptide Critic is a review site: it rates vendors with reader stars and sorts labs into tiers.

Most of these sites registered their domains between January and July 2026. Finnrick’s first published tests date from December 2024.

The sites at a glance

Site	What it rates	Where its data come from	Score	How it earns money (its own pages)
Finnrick	Vendors per peptide; shows labs	Samples it sends to partner labs, about 10,400 tests published	Recency-weighted pass %, five standards	Memberships, paid tests, vendor services
Peptigrity	Shops; directory of 32 labs	13,189 COAs and 859 reviews	50% reviews + 50% average HPLC purity	States no ads, no affiliates, no paid placement
PeptideBenchmark	Vendors; registry of labs	Ledger of 14,494 COA records	Trust bands and anomaly review	Paid sponsored placements; affiliate links allowed
Disclosed Labs	Vendors A–F; 40-lab index	6,401 COAs, 4,179 checked against lab portals	Weighted grade; lab points	Sponsored placements for A and B vendors only, subscriptions, listings, API
Merit Verified	Vendors and labs, 0–100	6,756 COAs, 1,166 lots, 166 vendors	Merit Score; lab-quality tiers	Some labelled affiliate links; no paid placement
PeptIQ	Labs (0–100) and vendors	Community COA database	Trust score; formula not published	App subscription, partner programme
VialAudit	Vendors	Anonymous quarterly buys; lab database studies	Weighted vendor score	Vendor affiliate programmes
Peptide Critic	Vendors (stars); labs by tier	Reviews, articles, forum	Stars; “Preferred” labs	Affiliate commissions, vendor subscriptions, sponsored placements
PeptideTrust	Vendor COA transparency	Vendors’ published COAs	10 weighted criteria	Discloses commission from some rated vendors

How each site scores

Finnrick

Finnrick classes each sample as pass, fail or incomplete. The default standard needs purity of at least 99.5% and a fill within ±35% of the label. Newer tests count more, with a half-life of about two years. A second public standard narrows the fill window to ±25% and adds a labelling score. Three more standards and the original lab certificates are for paying members. See our guide on how Finnrick works.

Peptigrity

For each lab, Peptigrity shows tests on file, the average purity of samples tested (it says this describes the products, not the lab), stated and reported turnaround, ISO/IEC 17025 on file, and whether reports can be checked on a lab portal. Each certificate gets a status: lab-verified, unverified, lab has no portal, or report number not found. Certificates that do not match the lab’s record are removed, and vendor in-house testing is not accepted.

Peptigrity also shows measured mg as a share of the label. From 95% to 110% is “in line”. Above 110% is never coloured as good, because reporting gross mass, with counter-ion and water included, inflates mg. About 40% of certificates were above 110% in September 2026.

PeptideBenchmark

Its lab registry shows, for each lab, the COA count, the share of COAs with a working lab verification link, the number of reused records and whether old links still respond. Its anomaly review flags patterns such as one report used for several compounds, identical files across vendors, dates out of order, and one lot shared across vendors. The site says these signals are not allegations. Our guide to reused COAs shows how one report ends up on many products.

Disclosed Labs

Vendor grades weigh purity at 30%, safety-panel coverage at 40%, lab corroboration at 15% and forgery signals at 15%, multiplied by an identity factor. The Lab Credibility Index starts each lab at 50 points:

Part	Points
COA volume (25, 100 and 500 COAs)	+5 each, up to +15
Vendor diversity (3+ or 10+ vendors)	+5 or +10
Public verification portal	+10
Verification engagement	+5
More than half of COAs confirmed on the lab’s own portal	+10
Panel types used on more than 25% of COAs	+5 each, up to +20
Purity SD below 0.15% with fewer than 5 vendors and 30+ COAs, unless panel breadth explains it	−25

Grades run A (90+), B (80–89), C (70–79), D (60–69) and F (below 60). Labs can claim their profiles for free. Our guide to too-perfect purity results explains why a very narrow spread draws attention.

Merit Verified

The vendor Merit Score (0–100) gives up to 40 points for independent COAs, weighted by lab quality and age, 25 for median purity, 20 for the number of distinct labs used (1 lab scores 8, 2 score 14, 3 or more score 20), 10 for breadth and 5 for years active. The lab score weighs accreditation, methods (HPLC purity plus LC-MS identity scores higher than a single method), independence and documented concerns. A lab owned by a vendor cannot reach a passing tier.

PeptIQ

PeptIQ’s trust bands run from “Strong track record” through “Solid” and “Mixed signals” to “Concerning” and “High concern”. A lab page lists COAs processed, documents per panel (identity, purity, endotoxin, sterility and others), any accreditation claimed, and how much of the lab’s output can be verified.

Peptide Critic

Peptide Critic’s testing-providers page tells readers to match the method to the question (HPLC-UV for purity, LC-MS/MS for identity) and to prefer labs that anonymise samples and hold ISO/IEC 17025 accreditation. Its about page lists premium vendor subscriptions, sponsored placements and affiliate commissions, and says a Premium membership does not raise a vendor’s ranking.

VialAudit, ChemVerify and PeptideTrust

VialAudit counts a lab as credible when it tests for many vendors and its failures are visible in public. Its vendor score weighs purity and COA accuracy at 40%, label accuracy 25%, shipping 20% and service 15%. ChemVerify buys products and has them tested at Janoshik, MZ Biolabs and Vanguard. PeptideTrust scores vendors on 10 criteria, including a named lab, COAs that can be checked at the source, and published sterility and endotoxin results.

The same lab, scored five ways

Lab	Peptigrity: average purity (certificates)	Disclosed: average purity % ± SD (COAs)	Merit: lab score	PeptIQ: trust	Peptide Critic
Janoshik	99.5% (2,556)	99.56 ± 0.47 (1,035)	30, Limited	60, Mixed	Preferred
Freedom Diagnostics	99.5% (4,790)	99.54 ± 1.27 (2,327)	70, Moderate	74, Solid	Standard
Vanguard Laboratory	99.4% (925)	99.41 ± 1.06 (555)	85, Strong	62, Mixed	Standard
TrustPointe Analytics	99.6% (236)	99.65 ± 0.41 (211)	65, Moderate	64, Mixed	Preferred
BTLabs	99.7% (127)	99.73 ± 0.16 (88)	65, Moderate	74, Solid	Standard

Rubric sites such as Merit Verified and Disclosed Labs give accreditation and safety panels a large weight. Editorial and community sites weigh a long track record, public report checks and how a lab reports mg. This helps explain why Janoshik ranks first with Peptides Weekly and is “Preferred” on Peptide Critic, yet scores 30 on Merit. Average purity describes the products a lab received, not the lab’s accuracy.

How to use peptide vendor ratings

1. Check what is rated. A vendor score and a lab score answer different questions.
2. Check the data source. A tested vial says more about real product than a vendor-chosen COA.
3. Check the date. Most scores weight or include older batches.
4. Check the money model. Each site describes it on its own pages.
5. Check the report yourself. Open the lab’s verification page and compare every number. Our guide to verifying a COA shows the steps.

What these sites look for in a report, and what ours show

Across the sites, the same report features come up: a per-report check on the lab’s own site, raw data, mass-spectrometry identity, published endotoxin and sterility results, and a clear statement of how the client is related to the lab.

Our reports carry their raw data (chromatograms, spectra), identity by LC-MS and, when ordered, endotoxin (LAL) and Sterility (USP <71>, 14 days). Each report is a signed record that anyone with its private link can check on /verify, and it states how the client is related to HK Analytical. The example report shows the format. We do not hold ISO/IEC 17025 accreditation.