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Try ChatPEP

Who makes ChatPEP

Updated Nov 5, 2026 · Applies to Web, iPhone, and Android · All plans

ChatPEP is made by Footnote Technologies LLC, a company based in Chicago, Illinois. It publishes ChatPEP on the web, in the Android app, and inside ChatGPT.

Where ChatPEP runs

The iPhone app is not on the App Store yet. See ChatPEP on the web, iPhone, and Android.

PEP

PEP is the world's first AI model built for peptide research. The current version is PEP 3. Each release is announced in News with notes on what changed. See The PEP model and release notes.

What ChatPEP draws on

  • Research. Answers draw on 200M+ peer-reviewed papers. Each claim points to the study behind it.
  • The peptide database. 67 compounds have a page in the peptide database, with what each one is, how it works, and how strong the evidence is.
  • Guides. 19 guides walk through a research task, from reading a study to checking the syringe math.

Reach the company

ChatPEP does not sell peptides or any other compound, and Footnote Technologies LLC does not either.

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