01
Sign in sequence
One signer at a time, each verified with a short-lived email code.
PENFIELD / BY COLLABIFY
Documents signed.
Evidence preserved.
Send a finished PDF for signature, verify who signs, and receive a cryptographically sealed document. Built for seamless integration with the software you already use.
02
Evidence by design
A tamper-evident event history and an SHA-256 fingerprint for every completed document.
03
API from day one
Workspace-scoped keys, idempotent uploads, status endpoints and signed callbacks.