Particle Peptides Alternative: Supplier Comparison
Comparing research-peptide suppliers and Particle Peptides is on your shortlist? A useful comparison rests on a handful of verifiable criteria: who tests the batches, how you obtain the certificate of analysis, where goods ship from, and what you actually pay including delivery. The table below lets you compare both suppliers in a few minutes.
Particle Peptides is among the longest-running and best-known suppliers in the region, with a wide catalogue and an extensive research blog. A wide catalogue is an advantage for less common items; when comparing, focus on what matters more for your work — breadth of range, or depth of documentation for the specific batch.
Comparison by verifiable criteria
| Criterion | Onyx Peptides | What to check with them |
|---|---|---|
| Testing | Every batch is tested by the independent Janoshik Analytical lab (Prague) — HPLC purity, identity by mass spectrometry. | Check whether a per-batch analysis is available and which laboratory performed it. |
| COA | Certificate of analysis for every batch on request; verification walkthrough on the batch-verification page. | Check the supplier’s website. |
| Dispatch | EU warehouse (Slovakia); orders before 16:00 CET ship the same day. | Check the supplier’s website. |
| Delivery | SK/CZ typically 1–3 business days via Packeta (pickup points or home courier). | Check the supplier’s website. |
| Payments | SEPA transfer (−2 %), crypto (−5 %), card payment, cash on delivery. Free shipping over €100. | Check the supplier’s website. |
| Catalogue | 19 items — a deliberately small catalogue we can keep tested and in stock. | Considerably wider range including lab equipment (several hundred URLs on their site as of the date below). |
| Languages | Storefront in 9 languages. | Storefront in Slovak and English (as of the date below). |
| Operator | Vexio j. s. a., company ID 54214530, Banská Bystrica — a registered Slovak company. | Check the supplier’s website. |
Statements about the other supplier reflect their public website as of 31 August 2026 and may change — verify directly with them before ordering. Spotted an inaccuracy? Email support@onyxpeptides.com and we will correct it.
How to read a comparison like this
Every supplier — us included — has an incentive to look good. So we recommend one thing above all: request the certificate of analysis for the exact batch currently in stock and verify its authenticity with the laboratory that issued it. A supplier who can do that within hours passes any comparison. See our guide to requesting a COA and the nine-point supplier checklist.
Further reading: how to buy from us · quality & testing · batch verification.
All products are sold strictly for in-vitro laboratory research. Not for human or veterinary use.