Company Overview

CSBio is a leading peptide and instrumentation manufacturing company located in Silicon Valley, California.
Since it's founding in 1993, CSBio has been providing automated peptide synthesizers to the global pharmaceutical community, that includes academic institutions, pharmaceutical companies, and peptide CDMOs (contract development and manufacturing organization). CSBio also produces high quality custom peptides and cGMP peptides as a peptide CDMO. Our peptide products and instrumentation can be found in production laboratories and pharmaceutical companies worldwide.

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Founders Heng Wei and Dario at American Peptide Symposium in the early 90's

CSBio has been deeply engaged with the peptide community across the globe for over 30 years. This includes attending every American Peptide Symposium since 1993, every European Peptide Symposium since 1994, and every Chinese Peptide Symposium since 1994. CSBio also attended the first Indian Peptide Symposium in 2007 and has attended every IPS since. CSBio has been the sponsors of dozens of conferences and symposiums, the receipt of multiple awards within various peptide communities, and has been featured in numerous scientific publications on peptides.

If you have a collaboration need, please contact us at

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CSBio at IOPC in Europe

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Platinum Sponsors at the American Peptide Symposium

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CSBio awarded at the Chinese Peptide Symposium

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Our Locations


CSBio is headquartered and based in the United States.
Please contact the Peptides headquarters for any peptide related needs, and contact the Instrumentation headquarters for any peptide synthesizer, DNA synthesizer, or HPLC purification equipment needs.

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+1 650 322 1111
20 Kelly Court, Menlo Park, CA, 94025

CSBio (Peptides HQ)

Headquarter site for peptide manufacturing, the Menlo Park location is an FDA approved and GMP certified site that produces clinical and commerical grade peptides.

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+1 650 525 6200
915 Linda Vista Ave, Mountain View, CA, 94043

CSBio (Instrumentation HQ)

Headquarter site for instrumentation, the Mountain View facility designs and manufacturers all of CSBio's instrumentation offerings.

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+1 650 322 1111
801 Buckeye Ct, Milpitas, CA, 95035

CSBio (Peptides)

The Milpitas site provides additional capacity for producing non-GMP peptides.


CSBio has offices in Shanghai and Taiwan.
Please contact our Shanghai office for any peptide or instrumentation needs within China.

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021-50781653 021-50781655
Pilot Free Trade Zone, 85 Faladi Road, Building 2, Room 502, Shanghai 201210, China

CSBio Shanghai Ltd

Located within the Life Science Cluster within Shanghai, CSBio Shanghai provides all sales, marketing, and technical support for all instrumentaiton and peptide needs within China.

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+886 3 6578668
A110, No.2, Section 2, Shengyi Road, Zhubei City, Hsinchu County 30261, Taiwan (ROC)

CSBio Taiwan Ltd

CSBio Taiwan is situated within Hsinchu, home to the world's largest and most advanced semiconductor industry. CSBio Taiwan performs electrical and software engineering for our instrumentation.


CHEMGO Organica AG
Florenz-Strasse 9, CH-4142 Muenchenstein, Switzerland
Tel: +41 61 264 95 69


Span Centre, 2nd Floor, Ramakrishan Mission Marg, Santacruz West, Mumbai, Maharashtra 400054, India
Tel: +91-22- 26045601/66802222


Watahan Trading Co., Ltd.
Watahan Nohara Bldg. 7F, 1-4,, Yotsuya, Shinjuku-ku, Tokyo 160-0004, Japan
Tel: +81-3-3353 2301


Meet CSBio at these events in 2024


Association for Accessible Medicines | February 5 - 7, 2024

Tampa, Florida, USA


Biologics 2024 | March 13 - 15, 2024

London, United Kingdom


DCAT 2024 | March 17 - 20, 2024

New York City, New York, USA


TIDES USA | May 14 - 17, 2024

Boston, Massachusetts, USA


European Peptide Symposium | August 25 - 30, 2024

Florence, Italy


Boulder Peptide Symposium | September 16 - 19, 2024

Boulder, Colorado, USA


CPHI Milan | October 8 - 10, 2024

Milan, Italy


Peptide Therapeutics Symposium | October 22 - 23, 2024

San Diego, California, USA


TIDES Europe | November 12 - 14, 2024

Hamburg, Germany

About Us

CSBio is a leading peptide and instrumentation manufacturing company located in Silicon Valley, California.

CSBio provides nonGMP and cGMP peptides, peptide APIs, research scale peptide synthesizers, commerical scale peptide synthesizers, DNA/RNA oligonucleotide synthesizers, and preparative HPLC purification equipment.

Peptide Contact

20 Kelly Court
Menlo Park, CA 94025


Instrumentation Contact

915 Linda Vista Ave
Mountain View, CA, 94043