Top Peptide Suppliers in the EU

A supplier comparison for research and business buyers. Every company on this page states a location in an EU member state on its own website; the country is shown on each listing. Every supplier is ranked by its Peptide Ad Lab score, and evidence coverage is shown next to each score.

EU-based suppliers onlyTesting & COAs reviewedSources and dates shownUpdated September 2026

How we score suppliers ·Advertiser disclosure

Advertiser disclosure: Peptide Ad Lab may have commercial relationships with companies on this page. Featured placements are labelled and are separate from the editorial ranking; they do not change any score or position. Details.

Editorial comparison

ranked by Peptide Ad Lab score · 6 ranked · 0 listed without a rank · September 2026
#1 · Highest editorial score

NeuroPept Ltd

Based in Netherlands

Best for Laboratories and biotech companies

Location
Rotterdam, Netherlands
Testing
Third-party testedBatch COAsPublic COAsHPLC purityMass spec IDNamed testing labLot traceability
Wholesale
Not confirmed
8.8/10Peptide Ad Lab Score
59% evidence coverage Visit website View company profile
See how we scored them

Overview

The company states it operates as a direct manufacturer supplying research peptides and custom synthesis services aimed at laboratories and biotech companies worldwide. The site publishes a product catalogue, facility standards including ISO 9001:2015 certification, and details on automated solid-phase peptide synthesis and HPLC purification workflows. Additionally, the website features batch-specific Certificates of Analysis issued by Freedom Diagnostics Testing.

According to the site, orders follow a four-stage workflow encompassing SPPS synthesis, HPLC purification, mass spectrometry verification, and vacuum lyophilisation before cold-chain worldwide shipping. The company states that Certificates of Analysis are provided with all orders and pre-shipment product verification photos are available upon request. However, public pricing and minimum order quantities are not stated on the site, requiring buyers to contact the team for quotes and specific purchasing terms.

Score breakdown weighted for this page

Testing & Documentation 25%
10.0
Business Transparency 20%
10.0
Wholesale Capabilities 15%
Not assessed
Manufacturing Capabilities 15%
10.0
Commercial Purchasing 10%
Not assessed
Fulfillment & Logistics 10%
10.0
Website / Buyer Experience 5%
10.0

Rubric score 10.0 across the 59% of the rubric verified so far, adjusted for evidence coverage to a published score of 8.8. How this is calculated

Full methodology.

#2

Peptide Direct

Based in Germany

Best for Clinics, brands, and distributors

Location
Gloucester, UK and Berlin, Germany
Testing
Batch COAsLot traceabilityWholesale docs
Wholesale
Yes
8.7/10Peptide Ad Lab Score
57% evidence coverage Visit website View company profile
See how we scored them

Overview

The company states it operates as a direct wholesale manufacturer serving commercial entities such as clinics, distributors, and wellness brands. The site publishes information on five main compound categories alongside optional private label services and quality assurance standards. According to the supplier, operations are based out of facilities located in the UK and Germany.

The site asserts that all compounds are manufactured under GMP and ISO 9001:2015 certified conditions, verified by HPLC to ≥98% purity, and shipped with a batch Certificate of Analysis. The purchasing process involves submitting an initial business enquiry to receive a response within 24 hours containing pricing and documentation details. Buyers must contact the supplier directly to ascertain specific minimum order quantities, tiered pricing structures, and shipping rates.

Score breakdown weighted for this page

Testing & Documentation 25%
Not assessed
Business Transparency 20%
10.0
Wholesale Capabilities 15%
10.0
Manufacturing Capabilities 15%
10.0
Commercial Purchasing 10%
10.0
Fulfillment & Logistics 10%
10.0
Website / Buyer Experience 5%
Not assessed

Rubric score 10.0 across the 57% of the rubric verified so far, adjusted for evidence coverage to a published score of 8.7. How this is calculated

Full methodology.

#3

Schafer-N ApS

Based in Denmark

Best for Biotech and university researchers

Location
Copenhagen, Denmark
Testing
Batch COAsMass spec ID
Wholesale
Not confirmed
8.2/10Peptide Ad Lab Score
39% evidence coverage Visit website View company profile
See how we scored them

Overview

The site states that Schafer-N is a Danish supplier specializing in custom peptide synthesis and high-density peptide microarrays for biotech and university researchers. The company says it uses proprietary peptide synthesizers and software systems without relying on third-party manufacturers. Additionally, the site outlines extensive peptide modification capabilities and analytical services backed by over 25 years of experience.

The company explains that orders and quotes are requested via email or contact form with sequence details, and responses are provided within 12 to 18 hours. Fulfillment involves worldwide courier shipping of lyophilized powders in airtight vials with LC-MS spec-sheets, typically within two weeks. Buyers would still need to ask about specific public pricing and minimum order requirements, as these are unstated on the site.

Score breakdown weighted for this page

Testing & Documentation 25%
Not assessed
Business Transparency 20%
10.0
Wholesale Capabilities 15%
Not assessed
Manufacturing Capabilities 15%
10.0
Commercial Purchasing 10%
Not assessed
Fulfillment & Logistics 10%
Not assessed
Website / Buyer Experience 5%
Not assessed

Rubric score 10.0 across the 39% of the rubric verified so far, adjusted for evidence coverage to a published score of 8.2. How this is calculated

Full methodology.

#4

BIOSYNTAN GmbH

Based in Germany

Best for Custom peptide researchers

Location
Berlin, Germany
Testing
Mass spec ID
Wholesale
Not confirmed
8.1/10Peptide Ad Lab Score
41% evidence coverage Visit website View company profile
See how we scored them

Overview

The site states that Biosyntan GmbH operates as a scientific service company founded in 1997, focusing on the custom synthesis of peptides. The company's offerings are aimed at researchers requiring standard or modified peptides, including fluorescently labeled options and post-translationally modified compounds. The website publishes detailed technical specifications covering standard peptides, special building blocks, and related services such as antibodies and immunogenic peptides.

According to the terms and conditions, products are analyzed via HPLC and mass spectrometry, with quantity and purity guaranteed according to product data sheets. Orders can be submitted via email, post, fax, or online, with shipping costs applicable outside of Germany. Buyers must contact the company directly for price quotes, as pricing is unstated on the website.

Score breakdown weighted for this page

Testing & Documentation 25%
Not assessed
Business Transparency 20%
10.0
Wholesale Capabilities 15%
Not assessed
Manufacturing Capabilities 15%
10.0
Commercial Purchasing 10%
Not assessed
Fulfillment & Logistics 10%
Not assessed
Website / Buyer Experience 5%
7.8

Rubric score 9.7 across the 41% of the rubric verified so far, adjusted for evidence coverage to a published score of 8.1. How this is calculated

Full methodology.

#5

Pen Peptide

Based in Bulgaria

Best for Research laboratories and distributors

Location
Plovdiv, Bulgaria
Testing
Mass spec ID
Wholesale
Yes
8.0/10Peptide Ad Lab Score
35% evidence coverage Visit website View company profile
See how we scored them

Overview

The site states that the company operates as an online platform supplying research peptides packaged in dual-chamber delivery pens. The offering is aimed at laboratories, scientific researchers, and wholesale distributors seeking pre-mixed formulations. Published content includes product categories, technical details on the Molecular Structure Stabilization Process Technology (MSSPT), and general FAQs.

The company says that orders are processed without a required user account, with payments accepted via bank transfer or credit and debit card. Shipments are dispatched using DHL Express with temperature-controlled cooling packs, requiring an adult signature upon delivery. Buyers would still need to inquire about specific bulk pricing structures, exact third-party testing laboratory names, and formal certificate of analysis availability.

Score breakdown weighted for this page

Testing & Documentation 25%
Not assessed
Business Transparency 20%
10.0
Wholesale Capabilities 15%
10.0
Manufacturing Capabilities 15%
Not assessed
Commercial Purchasing 10%
Not assessed
Fulfillment & Logistics 10%
10.0
Website / Buyer Experience 5%
Not assessed

Rubric score 10.0 across the 35% of the rubric verified so far, adjusted for evidence coverage to a published score of 8.0. How this is calculated

Full methodology.

#6

CASLO ApS

Based in Denmark

Best for Laboratories and research institutions

Location
Kongens Lyngby, Denmark
Testing
Batch COAsMass spec ID
Wholesale
Not confirmed
8.0/10Peptide Ad Lab Score
33% evidence coverage Visit website View company profile
See how we scored them

Overview

The company states that CASLO operates as a custom peptide synthesis provider serving academic customers and biopharmaceutical companies. According to the site, the business has over twenty years of experience supplying customer-specified synthetic peptides and modifications. Published content details technical methodologies, including Fmoc solid-phase synthesis, purity tiers, and peptide quantities ranging from 1 mg to multiple grams.

The supplier states that products are delivered with documentation such as HPLC and mass spectrometry certificates, alongside a money-back guarantee. The site outlines an ordering workflow where buyers contact the company directly by email, phone, or letter to receive a price quotation within 24 hours. Fulfillment is handled via worldwide delivery using express courier services, while pricing schedules remain unstated.

Score breakdown weighted for this page

Testing & Documentation 25%
Not assessed
Business Transparency 20%
10.0
Wholesale Capabilities 15%
Not assessed
Manufacturing Capabilities 15%
Not assessed
Commercial Purchasing 10%
Not assessed
Fulfillment & Logistics 10%
Not assessed
Website / Buyer Experience 5%
Not assessed

Rubric score 10.0 across the 33% of the rubric verified so far, adjusted for evidence coverage to a published score of 8.0. How this is calculated

Full methodology.

Every supplier on this page is ranked by its Peptide Ad Lab score. Evidence coverage differs between suppliers and is shown next to each score; where less has been verified, the score is pulled toward the baseline, never up.

How NeuroPept Ltd compares

A quick side-by-side of the #1 position against other suppliers based in the EU, using the same verified criteria we apply to every supplier. Full evidence and sources are on each company profile.

NeuroPept Ltd vs Peptide Direct

NeuroPept LtdPeptide Direct
LocationRotterdam, NetherlandsGloucester, UK and Berlin, Germany
Testing checks7 of 83 of 8
WholesaleNot confirmedYes
PAL score8.8/108.7/10
  • Both confirm batch COAs and lot traceability.
  • NeuroPept Ltd also confirms third-party testing, public COAs, HPLC purity, mass-spec identity testing and a named testing lab; not confirmed for Peptide Direct.
  • Peptide Direct also confirms a wholesale documentation pack; not confirmed for NeuroPept Ltd.
  • Peptide Ad Lab score: 8.8 vs 8.7. Evidence coverage: 59% vs 57%.

NeuroPept Ltd vs Schafer-N ApS

NeuroPept LtdSchafer-N ApS
LocationRotterdam, NetherlandsCopenhagen, Denmark
Testing checks7 of 82 of 8
WholesaleNot confirmedNot confirmed
PAL score8.8/108.2/10
  • Both confirm batch COAs and mass-spec identity testing.
  • NeuroPept Ltd also confirms third-party testing, public COAs, HPLC purity, a named testing lab and lot traceability; not confirmed for Schafer-N ApS.
  • Peptide Ad Lab score: 8.8 vs 8.2. Evidence coverage: 59% vs 39%.

NeuroPept Ltd vs BIOSYNTAN GmbH

NeuroPept LtdBIOSYNTAN GmbH
LocationRotterdam, NetherlandsBerlin, Germany
Testing checks7 of 81 of 8
WholesaleNot confirmedNot confirmed
PAL score8.8/108.1/10
  • Both confirm mass-spec identity testing.
  • NeuroPept Ltd also confirms third-party testing, batch COAs, public COAs, HPLC purity, a named testing lab and lot traceability; not confirmed for BIOSYNTAN GmbH.
  • Peptide Ad Lab score: 8.8 vs 8.1. Evidence coverage: 59% vs 41%.

NeuroPept Ltd vs Pen Peptide

NeuroPept LtdPen Peptide
LocationRotterdam, NetherlandsPlovdiv, Bulgaria
Testing checks7 of 81 of 8
WholesaleNot confirmedYes
PAL score8.8/108.0/10
  • Both confirm mass-spec identity testing.
  • NeuroPept Ltd also confirms third-party testing, batch COAs, public COAs, HPLC purity, a named testing lab and lot traceability; not confirmed for Pen Peptide.
  • Peptide Ad Lab score: 8.8 vs 8.0. Evidence coverage: 59% vs 35%.

Side-by-side comparison

Ordered by Peptide Ad Lab score.

#SupplierBased inCOAs / testingWholesaleScore
1 NeuroPept Ltd Rotterdam, NetherlandsYesNot confirmed 8.8 Profile
2 Peptide Direct Gloucester, UK and Berlin, GermanyYesYes 8.7 Profile
3 Schafer-N ApS Copenhagen, DenmarkYesNot confirmed 8.2 Profile
4 BIOSYNTAN GmbH Berlin, GermanyNot confirmedNot confirmed 8.1 Profile
5 Pen Peptide Plovdiv, BulgariaNot confirmedYes 8.0 Profile
6 CASLO ApS Kongens Lyngby, DenmarkYesNot confirmed 8.0 Profile

Methodology

How Peptide Ad Lab Evaluates Suppliers

Every supplier is scored on the same seven dimensions, and the overall score is calculated from those dimensions — it is never assigned by hand. Where a supplier has not published something, we record it as not confirmed: an information gap is excluded from the calculation rather than scored as a zero, and we never infer a capability a company has not stated.

Scoring weights on this page

Testing & Documentation
25%
Business Transparency
20%
Wholesale Capabilities
15%
Manufacturing Capabilities
15%
Commercial Purchasing
10%
Fulfillment & Logistics
10%
Website / Buyer Experience
5%

House weighting: testing and transparency carry the most weight for research and business buyers.

What we look at

Business transparencyCompany information, contact routes and operating detail that a commercial buyer can verify.
Testing / COA availabilityWhether certificates of analysis are published, provided on request, and tied to specific lots.
Wholesale capabilitiesExistence and clarity of a wholesale or bulk program, pricing tiers and account approval.
Manufacturing capabilitiesIn-house synthesis versus distribution, and what is documented about production.
Custom synthesisWhether made-to-order sequences are offered, and what the quoting process looks like.
Private-label availabilityPackaging and labelling programs, and the documented onboarding process.
Geographic fulfillmentWhere the supplier ships from and to, and any stated regional restrictions.
Website / business qualityClarity, completeness and consistency of published commercial information.
Jurisdictions and registrationWhether the supplier states where it operates or ships, and whether its business registration can be verified in a public registry.
Commercial purchasing optionsQuotes, purchase orders, account creation and repeat-order support for business buyers.
View Our Ranking Methodology

Frequently Asked Questions

How does Peptide Ad Lab evaluate suppliers?

Each supplier is assessed against a published set of criteria covering business transparency, testing and documentation, wholesale capabilities, manufacturing capabilities, website experience, commercial purchasing and fulfillment. Assessments use publicly available information: the company's own website, published documentation, and publicly stated programs. Where something cannot be confirmed, it is shown as not confirmed rather than counted against the supplier.

Can suppliers pay to be included?

Suppliers can purchase sponsored visibility, such as a featured placement on a comparison page or a sponsored position on a comparison page. Those placements are always clearly labelled as sponsored. Payment does not create, change or influence a Peptide Ad Lab editorial score. Where a comparison page includes a sponsored position, it carries a visible "Sponsored placement" label, and every other position on the page follows editorial score order.

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