CamoSign is a free, private by design e-signature application that features zero uploads of documents or signatory information.

CamoSign has zero data retention and operates locally/client side, but queries the latest Ethereum block as a credibly neutral timestamp. No accounts necessary.

The overall user flow is familiar: Prepare, Sign, Finalize. The difference is that these steps occur privately on each user’s computer and all information is shared directly amongst the parties.

All document uploads, signing actions, and document finalization and sealing is performed locally: the only external query is polling the latest Ethereum block to provide trusted timestamp verification at the time of each signature and finalization.

CamoSign’s servers never see any document nor signature information.

CamoSign Premium's license keys are automatically hashed to secretly derive the finalized document cryptographic signatures, so only the license holder can recreate the final, authoritative record hash. CamoSign is otherwise fully functional for free users.