Supplier comparison
CertaPeptides as an Alternative to Particle Peptides
Particle Peptides is a Slovakia-registered research-peptide supplier operating since 2015 with a public COA vault and full legal entity disclosure. They are one of our closest competitors in the EU supplier transparency index. This page compares the two suppliers across six objective, verifiable criteria so researchers can make an informed sourcing decision. All data is drawn from public sources checked as of June 2026.
Transparency index scores
Scored on the same pre-registered rubric across six axes. Full methodology on the EU Supplier Transparency Index.
Particle Peptides
68/100
CertaPeptides
69/100
Side-by-side comparison
Each point below is sourced from publicly verifiable data checked as of June 2026.
Third-party COA
Particle Peptides
Public COA vault with 76 batch-numbered PDFs covering purity, identity, content, endotoxins, heavy metals, and bioburden. Testing lab named only inside the PDF documents.
CertaPeptides
Per-batch Janoshik Analytical COAs published in the COA Vault. Each report is verifiable directly on Janoshik's own portal, and the lab is named publicly.
Legal entity disclosure
Particle Peptides
Fully disclosed: VAT SK2024128172, Banská Bystrica Commercial Register, registered office at Kolonáda 4490/18, Lučenec, Slovakia.
CertaPeptides
Fully disclosed: CERTALAB S.R.L., Romania, VAT RO54169956. Entity and registered address published on the terms page.
EU dispatch origin
Particle Peptides
States 'Shipping from EU country' but does not name a specific dispatch country.
CertaPeptides
Ships intra-EU from Romania to 33 destinations. Dispatch country explicitly stated.
Independent reviews
Particle Peptides
Trustpilot profile removed by Trustpilot under its guidelines at last check. An on-site widget shows 4.9/332 on an unverified platform.
CertaPeptides
Trustpilot 4.3/5 across 26 reviews (active, publicly verifiable profile).
Batch numbers on product pages
Particle Peptides
Batch numbers live in the COA vault but are not shown on individual product pages.
CertaPeptides
Batch numbers and COA links are surfaced directly on product pages.
What Particle Peptides does well
A fair comparison acknowledges genuine strengths.
Longest tenure in the EU supplier index (operating since 2015)
Comprehensive batch-numbered COA PDFs covering six test categories (purity, identity, content, endotoxins, heavy metals, bioburden)
Full legal entity and VAT disclosure with a verifiable Slovak commercial register entry
Why researchers choose CertaPeptides
COAs are independently verifiable on Janoshik Analytical's own portal, not just as PDFs we host
Explicit dispatch country (Romania) rather than an unspecified 'EU country'
Batch numbers and COA links appear directly on product pages, not only in a separate vault
Active, publicly verifiable Trustpilot profile
What to look for in any research peptide supplier
Regardless of which supplier you choose, these criteria help evaluate transparency and reliability.
Independent third-party COAs
Look for certificates of analysis from a named, independent laboratory -- not just in-house QC. Ideally, each COA should be verifiable on the lab's own portal, not just a PDF the seller hosts.
Legal entity disclosure
A legitimate supplier discloses its registered company name, VAT number, and address. Anonymous sellers with no traceable legal entity offer no recourse if something goes wrong.
EU dispatch origin
For EU-based researchers, intra-EU shipping avoids customs declarations, potential duties, and border delays. Check whether the supplier names its dispatch country explicitly.
Independent review footprint
Trustpilot or similar third-party reviews provide an independent signal. On-site testimonials alone are less verifiable. Check whether the profile is claimed and actively managed.
Further reading
All products sold by CertaPeptides are intended for laboratory research use only and are not for human consumption. CertaPeptides (CERTALAB S.R.L.) is a reseller, not a manufacturer. Comparison data is drawn from publicly verifiable sources and assessed under the same pre-registered rubric for all suppliers. Source dates and URLs are published on the EU Supplier Transparency Index.