What is Signattio? E-signatures with tamper-evident evidence

The end product is a PDF that carries three layers of evidence in the file itself. First, a PAdES signature for each signer: the signer's certificate, a digest of the exact signed bytes, and — when an RFC 3161 authority is configured — a trusted timestamp from that authority. Second, the evidence pack records the PAdES level actually reached; where the signing service can embed the certificate chain and revocation data, the document is B-LT, so the proof keeps working years later. Third, a sealed evidence certificate: a hash-chained record of everything that happened during the ceremony, from the identity check to the final signature.

None of that evidence depends on Signattio's servers staying alive. The file proves itself in any PAdES-aware validator — Adobe Reader, the European Commission's open-source DSS validator, or a command-line OpenSSL call — and the verification code in the delivery email opens the same evidence pack to anyone, without an account.

You create an envelope, upload the PDF, add recipients with an identity level each, and send. Signers receive a personal link, verify their identity by one-time code to their email or phone, review the document, draw their signature, and confirm. There is no account needed on the signer's side.

Every step is logged into the audit trail before the file is sealed, so the returned document is not just signed — it is documented.

Small businesses and teams that sign routine commercial paperwork: employment contracts and onboarding packs, quotes and purchase authorizations, agency and real-estate paperwork, NDAs and service agreements. Individuals use it too, for the same reason as for any e-signature tool: it is faster than print-sign-scan.

Product teams integrate through the API: envelopes in, sealed evidence out, webhooks reporting what happened, and an embedded signing ceremony that opens inside your own application when you want to keep the experience in-house.

There is a free trial tier (a limited number of envelopes per month) and paid plans above it — currently €9, €29 and €99 per month — covering more envelopes, more identity methods and API access. The pricing page lists the current split; nothing here should override it.

Not a qualified trust service provider, and not a producer of qualified signatures: the evidence here is the advanced tier, built to be checked, not presumed. Not a notary, not a lawyer, not a blockchain, not a replacement for reading what you sign. That boundary is worth a full read before you rely on it: