COSigna — How it compares

How is COSigna simpler?

Simpler for your signers, simpler for you to keep. They open a link, see the document, seal it — no account, no app, no upload. You keep one self-contained proof file instead of a vendor account you must keep alive.

Why is it better — and what does risk-free mean?

Better, because the proof outlasts any vendor and verifies without us. Risk-free means the people who sign need no account and no card, no data is surrendered, and the test certificate is yours to keep. One ceremony, not a migration — your DocuSign workflows stay where they are.

Is COSigna eIDAS compliant?

Yes — a Simple Electronic Signature, no more claimed. eIDAS Article 25 already protects that: an SES can't be denied legal effect for being electronic. Want more weight? Add a lawyer as a witness-COSignee.

Can a self-hosting company tamper with ceremonies?

No — not because it's watched, because it structurally can't. It holds no keys and never sees a document; the ring itself is tamper-evident, so any alteration fails offline verification, no server needed.

Who controls the timestamp?

Nobody at COSigna. Every ceremony is anchored to the Bitcoin blockchain via OpenTimestamps — a clock no one, including us or a self-hoster, can move.

	COSignaDepends on: a server that never receives your document — plus open verification anyone can run.	Cloud e-signatureDocuSign, Adobe Sign, Dropbox Sign, PandaDoc, SignNowDepends on: their servers (which hold your document) + your account	EU QES platformsYousign, Skribble, Scrive, Namirial, Universign, Lex Persona, OodriveDepends on: their QTSP servers + an identity provider	Timestamp-only servicesOpenTimestamps, OriginStamp, BernsteinDepends on: their service to store & return the proof
The document never leaves the signers' machines	✓	✗	✗	✓
Mutual human (face) attestation	✓	✗	~	✗
Independent timestamp (Bitcoin)	✓	✗	✗	✓
Verifiable offline, with no vendor	✓	✗	✗	~
Identity comes from people, not passwords	✓	✗	✗	~
Survives the vendor disappearing — no lock-in	✓	✗	✗	~

✓ by design · ~ partial / varies · ✗ no