NextGenPeps scores higher than Peptide Confidential on our transparency method (8.0 vs 7.6). It names two established labs, Janoshik and BioRegen, on every COA entry, publishes its LLC and a San Diego address, and ships inside the US. Peptide Confidential is better at the step NextGenPeps skips: each of its records is tied to a lot and a code printed on the vial, and it keeps rejected and withdrawn lots public. It's also cheaper on most items, but it's a Calgary business with no legal entity, and US orders cross the border. Neither has independent test data. NextGenPeps is #2 and Peptide Confidential #7 in our editors' order, which isn't sorted by score.
Notice: Research peptides are sold for in-vitro laboratory research only. They are not FDA-approved, not for human or animal consumption, and this page is not medical advice. This comparison covers supplier transparency only, based on public documentation. We didn't purchase or test products.
Side-by-side
| Peptide Confidential | NextGenPeps | |
|---|---|---|
| Transparency score (method) | 7.6 | 8.0 |
| Overall score | 7.6 | 8.8 |
| Based in | Calgary, Alberta, Canada; founder named; no legal entity | NUTRL LLC, San Diego, CA |
| Domain registered | July 10, 2026 | April 2025 |
| Labs | Peptide Test Canada, Testides | Janoshik, BioRegen |
| Lot on the record | Yes, with a code on the vial | No lot shown in the COA library |
| Failed lots published | Yes (5 rejected, 2 withdrawn) | No |
| Finnrick | No profile | No profile |
| Ships from | Calgary (Canada Post international to the US) | California (USPS), US only |
| Free shipping | Orders of CA$200+ | US orders of $150+ |
| Payment (US orders) | Card, crypto | Visa, MC, Amex, Discover, PayPal, Apple Pay |
| GLP-class naming | Retatrutide as "GLP3 RT"; tirzepatide by name | Three code-named SKUs (GLP-RT, GLP-TZ, GLP-S) |
COAs and labs: better-known labs vs better lot matching
NextGenPeps names its lab on every entry in its COA library, and both labs are widely used in this market: Janoshik reports carry a task number and key you can check on Janoshik's site. The gap is the lot. The library doesn't show lot numbers, so tying a report to the vial you received takes extra steps (review).
Peptide Confidential ties every record to a lot. The code on the vial opens the record, which names the lab, test date and purity and links the lab's document, and its lab reports page also lists lots it rejected or withdrew. Its labs are less established: both are Canadian, neither publishes an accreditation we could find, and its FAQ says the Testides certificate has no LC-MS/MS identity test. Two current records (tesamorelin and GLP3 RT 30 mg) were corrected to "lot not confirmed" in October (review).
See how to verify a Janoshik report and how to read a peptide COA.
Business transparency
NextGenPeps publishes NUTRL LLC and a San Diego address and has a year longer on record. Peptide Confidential names its founder, Troy White, and publishes a Calgary phone number, WhatsApp and email, but no entity or street address.
Labeling
Both run strict research-use terms. Both also sell retatrutide under a code name; NextGenPeps does the same for its tirzepatide and semaglutide listings, while Peptide Confidential sells tirzepatide under its real name.
Price check
| Item | Peptide Confidential (Oct 13, 2026) | NextGenPeps (Sep 26, 2026) |
|---|---|---|
| MOTS-c 10 mg | CA$50 (about $35.04) | $42 |
| TB-500 10 mg | CA$60 (about $42.04) | $72 |
| Tesamorelin 10 mg | CA$69 (about $48.35) | $74 |
| Epitalon 10 mg | CA$55 (about $38.54) | $34 |
Peptide Confidential is cheaper on three of the four, before its automatic multi-vial discount. It charges in Canadian dollars, so your card issuer sets the final US amount.
Shipping and returns
NextGenPeps ships from California by USPS within 1-3 business days, free over $150, US only; wrong items are reshipped and losses are reviewed case by case (reship policy). Peptide Confidential aims to ship the same business day from Calgary. US parcels clear customs, it doesn't quote a delivery window, and a parcel customs seizes isn't refunded or reshipped (shipping policy). It replaces damaged, lost and lab-mismatched items but takes no change-of-mind returns. See peptide shipping and customs.
Independent testing
Neither has community test data. Finnrick had no profile for NextGenPeps or Peptide Confidential when we checked, so every certificate on both sites was commissioned by the vendor. NextGenPeps' Janoshik reports can at least be confirmed at the lab, which is the closest either comes to outside verification. See Janoshik vs Finnrick.
Which should you choose?
- Choose NextGenPeps if you want established labs, a published LLC and domestic shipping. Visit NextGenPeps.
- Choose Peptide Confidential if you want every record tied to your vial's lot, a public record of failed lots and lower prices, and you're fine with a cross-border order. Visit Peptide Confidential.
Either way, open the certificate for your lot and check it with the lab that issued it.