Custom Peptide Synthesis Services
Compare peptide synthesis companies offering made-to-order sequences for discovery research, assay development, preclinical programs, and regulated manufacturing. Showing 164 listed suppliers.
Request quotes against one written specification covering sequence, termini, modifications, salt form, quantity, purity, analytical package, packaging, and delivery date. This makes technical scope and pricing comparable across providers.
Directory listing last reviewed October 2026.
Bachem Holding AG
Switzerland / USA • CDMO
GenScript Biotech
USA / China • CDMO
Almac Group
UK (NI) • CDMO
CPC Scientific
USA / China • CDMO
JenaBioscience
Germany • Life Science Supplier
GL Biochem (Shanghai)
China • Bulk Wholesale
Zhejiang Peptites Biotech (ZPC)
China (Shengzhou, Zhejiang) • Manufacturer
Hangzhou Leap Chem
China • Bulk Wholesale
Biomatik
Canada • Institutional
Sinopep Biopharma
China • CDMO
Shanghai Yaxian Chemical
China (Shanghai) • CDMO
Peptide Institute Japan
Japan • CDMO
AdachiBio
Japan • CDMO
Global Peptide Sciences
Australia • Research Supplier
Modpep
Unknown • CDMO
Thermo Fisher Scientific
USA / Global • CDMO
Sigma-Aldrich (Merck)
USA / Global • Chemical Supplier
Biotech Peptides
USA (NV) • Research Supplier
Cenexa Labs
USA (WY) • Research Supplier
PeptidePure
USA • Pharmacy
Sports Technology Labs
USA • Research Supplier
Peptide Pros
USA • Wholesale
Evonik Health Care - Hanau
Germany • CDMO
Vetter Pharma-Fertigung GmbH
Germany • CDMO
USV Peptides
Unknown • CDMO
Divi's Laboratories
India • CDMO
Aragen Life Sciences
India / USA (CA) • CDMO
Sai Life Sciences
India • CDMO
Senn Chemicals
Switzerland • CDMO
Space Peptides
Switzerland / China • CDMO
Genepep
France • CDMO
CBL Patras
Greece • CDMO
Biopeptek
USA (Malvern, PA) • CDMO
Veranova
USA • CDMO
SK pharmteco
Korea / USA • CDMO
Peptron Inc.
South Korea • CDMO
HLB PEP (formerly AnyGen)
South Korea • CDMO
TAPI (Teva API) / Novetide
Israel / Global • CDMO
Nanjing Peptide Biotech
China • CDMO
Hybio Pharmaceutical
China • CDMO
TCG Lifesciences
India • CDMO
ChemExpress (Shanghai Haoyuan)
China (Shanghai) • CDMO
piCHEM GmbH
Austria • CDMO
Biosynth
Switzerland / Netherlands / USA • CDMO
Phoenix Pharmaceuticals
USA (CA) • CDMO
RS Synthesis
USA (KY) • CDMO
PeptideHQ
USA / Global • Wholesale
Purity Peptides
USA • Research Supplier
Alpha Omega Peptide
USA (FL) • Research Supplier
Royal Peptides
USA / Canada • Research Supplier
Essential Peptides UK
UK • Retail Research Peptides
PurePeptide Labs
USA / Global • CDMO
KareBay Biochem
USA (NJ) • CDMO
CanPeptide
Canada • CDMO
Auspep
Australia • CDMO
S BioChem
India (Kerala) • CDMO
Ramshan Lifesciences
India (Vadodara) • CDMO
Serox GmbH
Germany (Mannheim) • CDMO
BioCat GmbH
Germany • Life Science Supplier
Polypure GmbH
Germany • CDMO
Biosyntan GmbH
Germany • CDMO
Phoenix Labs
Unknown • Research Supplier
LaikangBio
Unknown • Research Supplier
Peptide Sciences
USA (NV) • Research Supplier
Core Peptides
USA (FL) • Research Supplier
Peptidology
USA (AZ) • Research Supplier
Valar Peptides
USA • Research Supplier
JYMed Peptide
China (Shenzhen) • CDMO
Omizzur Biotech
China • CDMO
NAGASE PeptiStar
Japan • CDMO
Jiangsu Nuotai (Ao Nuo) Biopharmaceutical
Unknown • CDMO
WuXi TIDES
China • CDMO
Kilo Biotechnology
China (Ningbo) • CDMO
CSBio
USA (CA) • CDMO
Vivitide
USA • CDMO
Pepscan
Netherlands • CDMO
AnaSpec
USA (CA) • Research Supplier
Bio Basic
Canada (Ontario) • Research Supplier
Qianmiao Peptide
China (Zhengzhou, Henan) • Wholesale
ASPeptide
China • Wholesale
BCN Peptides
Spain (Barcelona) • Retail Research Peptides
Chinese Peptide
Unknown • CDMO
Eurogentec
Belgium • CDMO
Cambridge Peptides
UK (Birmingham) • Retail Research Peptides
Research Biolabs
UK • Retail Research Peptides
Bionexis Peptides
UK • Retail Research Peptides
Harris Peptide Laboratory
New Zealand (Auckland) • Research Supplier
NeoPeptix
China / Global • Research Supplier
Australian Peptide Supply
Australia • Research Supplier
Panacea Bio Chem
UK • Retail Research Peptides
AltaBioscience
UK (Worcestershire) • CDMO
Sichuan Pengting Technology Co., Ltd.
China (Sichuan) • Bulk Wholesale
Vitaconin Biotechnology
China • Bulk Wholesale
AmideBio
USA (Colorado) • CDMO
Geo Peptides
USA (Florida) • Research Supplier
peptides&elephants GmbH
Germany (Hennigsdorf) • Manufacturer
EUROPEPTA GmbH
Unknown • Manufacturer
NUMAFERM GmbH
Germany (Düsseldorf) • CDMO
Elabscience Bionovation Inc.
USA (Houston) • Manufacturer
ATG:biosynthetics GmbH
Germany • Service Provider
CordenPharma Colorado
USA (Boulder, CO) • CDMO
Cambrex (Snapdragon Chemistry)
USA (Waltham, MA) • CDMO
Peptido GmbH
Germany (Bexbach) • Manufacturer
Guizhou Utide Biotechnology
China (Zunyi, Guizhou) • Manufacturer
Active Peptide Company
USA (Cambridge, MA) • Manufacturer
Shenzhen Bestbell Pharma
China (Shenzhen) • Manufacturer
Neuland Labs
India (Hyderabad) • CDMO
Shilpa Pharma
India • CDMO
Laurus Labs
India (Hyderabad) • CDMO
Axplora
Germany / Europe • CDMO
Ajinomoto Bio-Pharma Services
USA (Grove City, OH) / Belgium / Japan / India • CDMO
Biopeptide Co.
USA (San Diego, CA) • CDMO
Hangzhou Thinheal Pharma-Tech Co.,Ltd
China (Hangzhou) • CDMO
Hangzhou Go Top Peptide Biotech Co., Ltd.
China • Manufacturer
Suzhou Tianma Pharma Group Tianji Bio-Pharmaceutical Co., Ltd.
China • Manufacturer
Hanmi Pharmaceutical Co., Ltd.
South Korea • CDMO
Aurigene Pharmaceutical Services Ltd.
India • CDMO
Zhejiang Jiuzhou Pharmaceutical Co., Ltd.
China • CDMO
SB-PEPTIDE
France • Manufacturer
Intavis Peptide Services GmbH
Germany • Manufacturer
SynCrest Inc.
Japan • CDMO
Porton Pharma Solutions Ltd.
China • CDMO
Mimotopes Pty Ltd
Australia • Manufacturer
LifeTein
USA • Service Provider
AAPPTec
USA (KY) • Chemical Supplier
Pepmic
USA / China • Service Provider
PSPeptides
USA • Research Supplier
Peptide Source
USA • Research Supplier
Verified Peptides
USA • Research Supplier
Advanced ChemTech
USA (KY) • Chemical Supplier
Combi-Blocks
USA (CA) • Chemical Supplier
JPT Peptide Technologies
Germany (Berlin) • CDMO
CASLO ApS
Denmark • Service Provider
PeptiSystems AB
Sweden • Equipment Manufacturer
CARBOGEN AMCIS
Switzerland • CDMO
Auro Peptides
India (Hyderabad) • CDMO
USV Private Limited
India (Mumbai) • Manufacturer
PharmaBlock Sciences
China (Nanjing) • Chemical Supplier
Curia Global
Global • CDMO
China-Sinoway
China (Xiamen) • Supplier
Apeloa Pharmaceutical
China • Manufacturer
Lianhe Aigen
China • CDMO
Hemmo Pharmaceuticals (Piramal Pharma Solutions)
India (Mumbai) • Manufacturer
Lupin (Peptide Division)
India • Manufacturer
Watanabe Chemical Industries
Japan • Supplier
Hefei KS-V Peptide Science
China (Hefei) • Supplier
Best Biochem
China • Supplier
Leadgene Biomedical
Taiwan • Supplier
Chemigran Pte Ltd
Singapore • CDMO
Alabiochem
China (Suzhou) • CDMO
Latoxan
France (Valence) • Supplier
Polpharma API
Poland • CDMO
Biointech
Brazil (Brasília) • Supplier
Acrotein Chembio Inc.
USA (Alabama) • Chemical Supplier
Alfa Chemistry
United States • Chemical Supplier
Chinese Peptide Company (Medtide)
China (Hangzhou) • CDMO
Hangzhou Enogen Biotech
China (Hangzhou) • CDMO
Suzhou Motif Biotech
China (Suzhou) • CDMO
DGpeptides
China (Hangzhou) • Research Supplier
Hangzhou Apextide Biomedical
China (Hangzhou) • CDMO
Hangzhou Hotide Biotech
China (Hangzhou) • CDMO
Hangzhou Sigmatech Peptide Ltd
China • Research Supplier
Harbin Jixianglong Biotech
China (Harbin) • Manufacturer
Expert Peptide
China • Research Supplier
What is custom peptide synthesis?
Custom peptide synthesis is the made-to-order production of a peptide against a buyer's sequence, modification, quantity, purity, testing, and delivery requirements. Compare providers by sequence length, difficult chemistry, disulfide pattern, modifications, scale, purification, and characterization methods.
What affects a synthesis quote?
Cost and lead time are driven by amino-acid count, difficult residues, cyclization, conjugation, isotope or fluorescent labels, purity target, quantity, and documentation requirements. Ask providers to separate synthesis, purification, testing, and optional development work. Use the custom peptide synthesis quote guide to normalize proposals.
Analytical and quality requirements
At minimum, define identity and purity methods, peptide content, counter-ion expectations, and delivery format. Our peptide sourcing guides walk through each of these requirements. Regulated programs may also require method validation, impurity characterization, stability work, and facility-specific GMP documentation. Compare peptide CDMOs, peptide manufacturers, and GMP-listed suppliers.