C-NDA Protocol, built and operated by WitUp Ltd., helps people protect ideas, documents, and business collaborations through identified NDA signatures and verifiable evidence. Each party signs using a personal link and confirms their email with a one-time code; the system records details such as the signing date, IP address, and browser. Access to a meeting or document is granted only after the required NDA has been accepted.

Evidence is sealed with a unique SHA-256 fingerprint and anchored on the public Polygon blockchain. Parties receive certificates that can be checked online by anyone, without an account, and stored in a downloadable evidence archive. The service also provides a dashboard and includes two document protections per month in its Free plan. Data is hosted in Frankfurt, encrypted at rest, and kept within the European Union.

Document protection is currently active. Meeting protection, initially planned for Google Meet, and certified session transcripts are described as under development.