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Supplier Comparison Tool
Filter, sort, and side-by-side compare all 74 supplier profiles by public documentation access, testing claims, and review state. The 0–4 documentation signal counts public-source coverage; it is not a product-quality score or purchasing recommendation.
| Compare | Supplier | Country | Public docs | Documentation | Testing claims | Review state |
|---|---|---|---|---|---|---|
| AnaSpec | USA | 4/4 | HPLC and mass-spectrometry QC package | The company states that custom peptides are tested for purity by HPLC and identity by mass spectrometry under its quality-management system. | Official service page reviewed | |
| AQRO Research | Not disclosed | 4/4 | Product-level COA data claimed | The supplier states that product pages include COA data, purity specifications, batch information, and testing methodology. | Official site reviewed | |
| Bachem | International / global | 4/4 | Analytical Data Sheet and extended QC options | Standard custom-synthesis analytics include HPLC and MALDI-MS, with additional content, counter-ion, endotoxin, and other testing available. | Official service page reviewed | |
| BioInfinity Lab | USA | 3/4 | COA stated with every lot | The supplier advertises third-party HPLC verification and a certificate of analysis with each lot. | Official site reviewed | |
| Biotech Peptides | USA | 2/4 | RUO policy publicly stated | The reviewed terms establish intended-use boundaries but do not provide a catalog-wide batch-testing commitment. | Official site reviewed | |
| CPC Scientific | USA | 4/4 | COA, RP-HPLC, ESI-MS, and solubility package | The company states that every custom peptide, including crude material, ships with a COA, RP-HPLC, ESI-MS, and solubility data. | Official service page reviewed | |
| GenScript | International / global | 4/4 | COA, HPLC, and MS project package | GenScript states that all custom peptides undergo HPLC purity analysis and mass-spectrometry identity confirmation and ship with QC data. | Official service page reviewed | |
| Limitless Biotech | USA | 3/4 | COA stated with each order | The supplier states that every batch receives third-party HPLC, LC-MS, sterility, endotoxin, and contaminant screening. | Official site reviewed | |
| MedChemExpress | USA | 4/4 | Public batch COA PDFs | Located peptide COAs include batch number, mass-spectrometry identity, HPLC purity, storage information, and release conclusion. | Official batch documents reviewed | |
| Phoenix Pharmaceuticals | USA | 3/4 | COA stated with every order | Phoenix states that it manufactures in the USA, is ISO 9001 certified, and includes a certificate of analysis with every order. | Official site reviewed | |
| PureRawz | Not disclosed | 1/4 | Legacy third-party COAs located | Public 2023 COAs from MZ Biolabs show mass-spectrometry identity and UV/HPLC purity results for selected peptide lots. | Legacy documents reviewed; current policy needs review | |
| RESEARCH ONLY | International / global | 2/4 | Lot testing policy publicly stated | The supplier states that every lot receives HPLC and MS testing before release. | Official site reviewed | |
| Skye Peptides | USA | 4/4 | Public test-report PDFs | Public files include third-party COA and sterility reports for selected lots; the site also describes an in-house testing laboratory. | Official site and documents reviewed | |
| Solira | USA | 4/4 | COA library and product COAs | The supplier advertises independent HPLC and MS analysis, lot-specific COAs, and a public COA library. | Official site reviewed | |
| Sparta Labs | USA | 4/4 | Batch-matched COA and lab-results library | The supplier states a third-party HPLC standard, batch-matched COAs, and a public lab-results library. | Domain-parked finding documented; historical profile | |
| SwissChems | Not disclosed | 4/4 | Product-level lab reports | The supplier states that products are independently HPLC tested and that COAs are available on product pages and an independent-results page. | Official site reviewed | |
| Trident Labs | USA | 4/4 | Public COA library claimed | The supplier advertises independent testing, a six-panel COA for every batch, and a public COA library. | Official site reviewed | |
| Valar Peptides | International / global | 4/4 | Public product-level COAs found on 30 of 36 catalog pages checked | Public product-page COAs reviewed include a batch or lot number, analysis date, HPLC identity and purity results, measured peptide quantity, endotoxin result, instrument listing, and QC authorization. The supplier separately claims mass-spectrometry confirmation and third-party verification. | Official public batch documents reviewed | |
| Biomatik | International / global | 4/4 | COA, MS spectra, and HPLC chromatograms stated with peptide projects | The company states that custom peptides ship with a COA, mass-spectrometry data, and HPLC chromatograms. | Official peptide-synthesis service page reviewed | |
| Cayman Chemical | USA | 4/4 | Per-lot COAs on product pages with HPLC purity, MS identity, and heavy metals | Cayman Chemical publishes per-lot Certificates of Analysis on individual product pages. COAs include HPLC purity, mass spectrometry identity confirmation, and heavy metals screening results. | Official catalog, product, and ordering-policy pages reviewed | |
| Creative Peptides | USA | 4/4 | Project-specific analytical and quality documentation | The company advertises research-grade through API peptide synthesis with project-specific purification and analysis. | Official custom-synthesis service page reviewed | |
| JPT Peptide Technologies | International / global | 4/4 | Analyzed catalog peptides and project-specific batch documentation | JPT states that catalog peptides are analyzed and purified and that custom formats use quality and batch-reporting workflows. | Official products, services, and quality pages reviewed | |
| Selleck Chemicals | USA | 2/4 | Public product catalog and laboratory-RUO terms | The reviewed catalog provides product-specific technical information; batch documentation must be checked per item. | Official peptide catalog and terms reviewed | |
| Sigma-Aldrich | International / global | 2/4 | Product-specific SDS, specification, and documentation records | Analytical specifications and documentation vary by product, brand, and quality grade and must be reviewed individually. | Official research-product catalog reviewed | |
| Tocris Bioscience | International / global | 4/4 | Product pages, SDS records, and batch COAs | Tocris states that products are generally purity-tested and provides product- and batch-level documentation. | Official peptide catalog and safety pages reviewed | |
| Zerilyx Research | USA | 3/4 | COA stated as included | The supplier states that compounds are independently third-party tested and include certificates of analysis. | Official site reviewed | |
| Onyx Biolabs | USA | 4/4 | Public batch COA library | The supplier states that batches receive third-party HPLC purity and mass-spectrometry identity testing and that batch-numbered COAs are published online. | Official RUO, FAQ, and laboratory-results pages reviewed | |
| Modern Aminos | Not disclosed | 0/4 | Account-gated catalog and COA archive | The supplier states that each batch receives independent testing and a QR-linked report. Current catalog-wide public access could not be verified without an account. | Active site observed; catalog and COA archive were account-gated at the review cutoff | |
| Oath Research | USA | 4/4 | Batch-numbered public reports | The company states that lots are assessed using HPLC and mass spectrometry, with independent U.S. testing for fill quantity and batch-linked results. | Official company and public batch-document pages reviewed | |
| Ion Peptide | USA | 4/4 | Searchable batch COA library | The supplier publishes a searchable batch library and states that identity and purity are supported by HPLC and mass-spectrometry testing. | Official compliance, research-access, and COA-library pages reviewed | |
| BioLongevity Labs | USA | 4/4 | Public analytical-document library | The supplier states that batches are reviewed by three independent laboratories using methods including HPLC and LC-MS, with documentation available before purchase. | Official RUO, company, and public COA pages reviewed | |
| Peptide Partners | Not disclosed | 2/4 | Public RUO terms; batch review pending | Tracker sites report substantial COA coverage, but Peptide Report has not yet completed an official-site document-level audit. | Official terms and intended-use policy reviewed | |
| Nexus Laboratory | USA | 4/4 | Public verified and pending batch statuses | The supplier publishes normalized batch summaries and describes independent HPLC and mass-spectrometry testing. Original laboratory reports were not public on the reviewed pages. | Official catalog, verification, and batch-status pages reviewed | |
| Certified Aminos | USA | 4/4 | COA and traceability claims vary by access lane | The company states that GMP/API materials include COAs and traceability and that RUO materials are separated from regulated pharmacy access. | Official wholesale, RUO, and documentation pages reviewed | |
| Simple Peptide | USA | 4/4 | Searchable public COA library | Published reports include lot identifiers and analytical fields for purity, identity, content, and, on some records, endotoxin testing. | Official COA search and public batch reports reviewed | |
| Penguin Peptides | USA | 2/4 | Public RUO policy; batch audit pending | No catalog-wide public batch-testing commitment was established from the reviewed disclaimer. | Official legal identity and RUO disclaimer reviewed | |
| Hydro Research Peptides | Not disclosed | 4/4 | Searchable multi-report COA library | The supplier lists product-specific purity, identity, endotoxin, heavy-metal, and sterility documents where available. | Official multi-document laboratory-results library reviewed | |
| Drexa Labs | Not disclosed | 4/4 | Batch-focused analytical records | The company states that batch COAs include HPLC purity, mass-spectrometry identity confirmation, and physical specifications. | Official research-use and testing-standard pages reviewed | |
| Aurex Research Series | Not disclosed | 2/4 | COA lookup and batch-specific documentation claimed | The supplier states that batches receive third-party HPLC purity and mass-spectrometry identity testing and that COAs are available by lookup or request. | Official RUO and analytical-testing claims reviewed | |
| LA Peptide Labs | USA | 4/4 | Public product COAs | The catalog displays lot identifiers, HPLC purity values, and links to product COAs before shipment. | Official catalog, synthesis, and COA records reviewed | |
| New-U Research Compounds | USA | 4/4 | Per-lot COA publication claimed | The supplier states that release batches receive verification from Janoshik Analytical and/or Freedom Diagnostics with HPLC and mass-spectrometry records. | Official company, RUO, and dual-laboratory claims reviewed | |
| Blue Line Research | USA | 2/4 | Testing announced; results pending | The dedicated COA page says analytical validation is in progress and reports will be posted as received. | Official RUO policy reviewed; analytical validation pending | |
| Peptigen Labs | International / global | 4/4 | Mixed public and on-request batch COAs | The supplier publishes batch-numbered reproductions for some products and states that original HPLC and mass-spectrometry documentation is retained privately. | Official legal, RUO, product, and COA pages reviewed | |
| Freedom Aminos | USA | 2/4 | Sample report and batch documentation by request | The supplier states that batches receive HPLC and mass-spectrometry testing through Freedom Diagnostics and that orders include batch-matched documentation. | Official RUO, catalog, and COA pages reviewed | |
| Noxa Labs | USA | 4/4 | Public batch-specific certificate library | The certificate library displays batch-specific reports attributed to Freedom Diagnostics with HPLC purity, mass-spectrometry identity, and net-content fields. | Official compliance, catalog, and certificate pages reviewed | |
| Stemcode Peptides | USA | 4/4 | Public searchable batch table and downloadable reports | The public results table names Freedom Diagnostics and Janoshik Analytical and exposes lot, purity, net content, identity, endotoxin, report date, and report links. | Official terms, laboratory results, and product records reviewed | |
| Prosper Labs | USA | 4/4 | COA library and product-level documentation claimed | The supplier states that every batch receives independent analysis and that certificates are published in a COA library and on supported product pages. | Official RUO, catalog, and testing pages reviewed | |
| ReviveLab | International / global | 2/4 | Site references certificates or lab results | Site references analytical testing language | Auto-discovered profile under editorial review | |
| NUPEPS Peptides | USA | 2/4 | Site references certificates or lab results | Site references analytical testing language | Auto-discovered profile under editorial review | |
| Peptira | USA | 2/4 | Site references certificates or lab results | Site references analytical testing language | Auto-discovered profile under editorial review | |
| Peptides Research | International / global | 2/4 | Site references certificates or lab results | No analytical testing language observed | Auto-discovered profile under editorial review | |
| SMART MD Peptides | USA | 2/4 | Site references certificates or lab results | Site references analytical testing language | Auto-discovered profile under editorial review | |
| Research Vials | USA | 2/4 | Site references certificates or lab results | Site references analytical testing language | Auto-discovered profile under editorial review | |
| PARTICLE, s. r. o. | USA | 2/4 | Site references certificates or lab results | Site references analytical testing language | Auto-discovered profile under editorial review | |
| Precision Peptide MD | USA | 1/4 | Site references certificates or lab results | Site references analytical testing language | Auto-discovered profile under editorial review | |
| UMBRELLA Labs | USA | 1/4 | Site references certificates or lab results | Site references analytical testing language | Auto-discovered profile under editorial review | |
| Sarms Central | International / global | 1/4 | No public documentation policy observed | Site references analytical testing language | Auto-discovered profile under editorial review | |
| Advanced Research Consulting | International / global | 1/4 | No public documentation policy observed | No analytical testing language observed | Auto-discovered profile under editorial review | |
| Extreme Peptide | International / global | 1/4 | No public documentation policy observed | Site references analytical testing language | Auto-discovered profile under editorial review | |
| American Peptides | International / global | 1/4 | No public documentation policy observed | No analytical testing language observed | Auto-discovered profile under editorial review | |
| Infinity Peptides | International / global | 1/4 | No public documentation policy observed | Site references analytical testing language | Auto-discovered profile under editorial review | |
| Peptides Warehouse | USA | 2/4 | Could not verify COA access due to Cloudflare challenge | Unverified. Cloudflare challenge prevented review of COA or testing documentation. | Site access blocked by Cloudflare challenge; limited review | |
| Science.bio | USA | 1/4 | Site closed; historical COA access no longer available | Historical supplier. Closure notice warns against impersonator sites claiming to be Science.bio. | Closure notice reviewed | |
| Behemoth Labz | USA | 4/4 | First-party COAs as webp images organized by year (2019-2025); no PDFs; no independent lab named | First-party COAs displayed as images. No independent third-party laboratory identified on reviewed certificates. | Official site reviewed | |
| Chemyo | USA | 4/4 | Batch-level COA/HPLC/concentration report images (~192 batch codes, ~860 reports); third-party lab named on reviewed COA | Third-party tested by Nutri Analytical Testing Laboratories (Anaheim, CA). Sample COA BA2157 showed 99.54% purity by UHPLC. Claims 99%+ purity standard. | Official site reviewed | |
| Sports Technology Labs | USA | 4/4 | Per-product third-party COAs with dates and purity values; named independent labs (MZ Biolabs, Colmaric Analyticals) | Third-party tested by MZ Biolabs (Tucson, AZ; DEA Schedule III license RP0584676) and Colmaric Analyticals LLC. Sample PT-141 COA showed 99.90% purity by HPLC-UV-MS. | Official site reviewed | |
| Amino Asylum | USA | 2/4 | No COA or lab documentation found on reviewed pages | No testing claims, COA downloads, or third-party lab references were found on the reviewed 2021 product and catalog pages. | Live site inaccessible; reviewed via Internet Archive captures | |
| Peptide Pros | USA | 4/4 | Public COA PDFs for 17 products, most from MZ Biolabs (Tucson, AZ) | The supplier claims USA-based third-party lab COA reports. A reviewed BPC-157 COA from MZ Biolabs shows HPLC purity, mass spectrometry identity confirmation, lot number, and analysis date. The FAQ guarantees above 99% purity on all products. | Official site and public COA documents reviewed | |
| Swiss Chems | USA | 4/4 | Public lab reports with Janoshik Analytical verification links (24 reports listed, 18 Janoshik-named) | The FAQ states batches are submitted for independent analysis by accredited third-party laboratories, principally Janoshik Analytical, using HPLC. The Independent Test Results page provides downloadable PDFs with verify.janoshik.com links. The about page claims every product undergoes third-party HPLC testing ensuring over 99% purity. | Official site and public lab reports reviewed | |
| UK Peptides | International / global | 4/4 | Supplier-issued COA PDFs downloadable from product pages | The FAQ states peptides are produced via solid-phase peptide synthesis, purified by reverse-phase HPLC, with in-house testing confirming purity and identity. CoAs are available to download on each product page. The about page states quality verification occurs at a compounding partner's laboratory. Reviewed COAs are supplier-issued documents, not from an independent third-party lab. | Official site and public COA documents reviewed | |
| Direct Peptides | International / global | 2/4 | Site-wide purity and testing policy | The company claims a minimum 99% purity for standard peptides and 98% for complex peptides, with HPLC purification and mass-spec analysis on all batches, production at a GMP-inspected and ISO 9001 certified facility, and storage at -20C. | Official site reviewed | |
| Enhanced Peptides | USA | 2/4 | Site-wide purity claims with per-product HPLC figures | The supplier states that its peptides, SARMs, and research compounds are independently verified to 99%+ HPLC purity, with per-product purity percentages shown on catalog cards. | Official site reviewed | |
| Polaris Peptides | USA | 0/4 | Account-gated catalog; no public documentation found | No public testing or COA claims could be verified at the review cutoff because the catalog, guarantee details, and any lab documentation sit behind the members-only gate. | Official site reviewed; catalog account-gated at the review cutoff | |
| Xcel Peptides | USA | 4/4 | Public third-party Janoshik report archive | The company publishes third-party Janoshik lab reports for selected products in a public archive and states that each production batch is tested before cold storage, with report dates explained in a dedicated blog post. | Official site and public lab-report archive reviewed |
Side-by-side comparison
This tool compares public documentation coverage, not product quality. Research-use-only suppliers are not regulated as drug manufacturers, and supplier testing claims have not been independently reproduced. Browse the full supplier research directory for source links and editorial boundaries.