COA Transparency
Per-batch Certificate of Analysis publication, batch numbering discipline, and public archive accessibility. Vendors who publish every batch by default score highest.
The DoseCraft Vendor Directory
The Peptide Vendor Directory With Real Trust Scores
Every peptide tracker logs what researchers took. DoseCraft also tells you where it came from. We assess suppliers across third-party Certificate of Analysis verification, HPLC and mass-spec purity testing, cold-chain handling, customer service, and community-reputation longevity. Vendor assessments are published as they are completed. Trust scores are editorial and affiliate status does not inflate them.
Affiliate disclosure: DoseCraft has affiliate revenue agreements with all vendors listed. A vendor losing partner status would be removed from this directory (we lose audit access) — not downgraded.
5 listed vendors6 trust dimensionsReviewed 2026-04
Showing 5 of 5 vendors
Peptide Partners
USA · Since 2021
Trust Score4.5/5
- HPLC + Mass Spec on every batch — public lab reports
- Free replacement guarantee if independent testing fails purity
USACanada
MyOasis Labs
USA · Since 2020
Trust Score4.5/5
- Widest peptide catalog (54+ compounds) — injectables, oral caps, blends
- Third-party lab tested with COAs on request
USAInternational
Hydro Research Peptides
USA · Since 2024
Trust ScoreAssessment pending
- Largest discount code in the roster — 20% off with code DOSE20
- Newest addition to DoseCraft's verified vendor roster
USA
Paramount Peptides
USA (Southern California)
Trust ScoreAssessment pending
- States HPLC + mass-spectrometry verification with a Certificate of Analysis per batch (per site)
- Searchable COA portal by product/batch number (per site)
USA
Apex Peptides
Location pending
Trust ScoreAssessment pending
- 35 products listed on their public product sitemap, spanning peptides, oral compounds, and reconstitution accessories
The Methodology
How We Score Every Vendor
Six dimensions, weighted for what actually matters in research supply: purity evidence and documentation first, logistics and service second, reputation third.
Purity Verification
Third-party HPLC and mass-spectrometry testing practices. We weight independent-lab verification (e.g., ACS Independent Laboratories) over self-attested purity claims.
Cold-Chain Handling
Refrigerated shipping, gel-pack insulation, transit-time windows, and packaging integrity. Critical for peptide stability in summer transit and long international routes.
Customer Service
Refund policy clarity, email response time, dispute-handling track record, and community-reported resolution rates across Reddit and Discord signal sources.
Longevity & Reputation
Years in business combined with community-reputation depth. Long operating history plus stable community signal outweighs aggressive marketing from newer entrants.
Overall Trust
Weighted aggregate across all dimensions with purity and COA weighted heaviest. Elite tier (4.5+) reserved for vendors with best-in-class practices across every dimension.
Track Your Protocol With Vendors You Trust
DoseCraft connects vendor attribution with your compound log. Close the loop between what you sourced, what you logged, and what actually worked.
Start TrackingDisclaimer: DoseCraft is a research-only platform. We do not sell peptides. We have affiliate revenue agreements with all vendors listed — this is disclosed on every vendor page. Trust scores are editorial and unaffected by affiliate status. Completed vendor scores reflect our independent assessment as of April 2026 and are reviewed quarterly. Pending assessments are labeled. All vendors listed are research-chem suppliers selling compounds for in-vitro investigation only — products are not intended for human consumption and have not been evaluated by the FDA to diagnose, treat, cure, or prevent any disease.