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DOCUMENTS THAT MOVE FORWARD

Meet zSign.
Send. Sign. Done.

Prepare PDFs, request signatures, follow progress and keep a tamper-evident audit trail in a proper self-hosted signing workspace beside your Zmail.

Open zSign See the security boundary
  • Self-hosted
  • Audit trails
  • Separate signing authority
zSign by Zmail
Powered by the open-source OpenSign engineHosted on Zmail infrastructure
A COMPLETE SIGNING DESK

From blank PDF to completed agreement.

Build repeatable templates, place signature and form fields, invite signers, track every step and download the completed record.

Prepare and send

Upload a document, add recipients and place the fields each person must complete.

  • Multiple signers and signing order
  • Reusable templates
  • Email invitations and reminders

Sign from anywhere

Recipients open a focused signing link in a modern browser without learning a complicated workflow.

  • Draw, type or upload a signature
  • Guest signer verification options
  • Completed-document download

Evidence that travels

Completed documents include signing records designed to show who acted and when.

  • Document activity history
  • Completion certificates
  • Cryptographic PDF sealing

Account-bound access

zSign uses your authenticated Zmail identity while every document action still requires an explicit choice.

  • Automatic Zmail-to-zSign sign-in
  • Dedicated document data store
  • Zmail portal offers optional authenticator TOTP
CLEAR AUTHORITY BOUNDARIES

One account. No silent signatures.

Your active Zmail identity opens the matching private zSign workspace automatically. That sign-in grants access only: uploading, sending or signing a document still requires a deliberate action inside zSign.

  • Document and audit data stored on Zmail's dedicated data disk
  • Database and application backends have no public host ports
  • Transactional invitations use a dedicated, rate-limited Zmail identity
  • Signing data is not ZMath Mail content and is not end-to-end encrypted
OPEN-SOURCE FOUNDATION

Powered by OpenSign v2.41.0.

zSign uses the self-hosted AGPL-3.0 OpenSign release. OpenSign provides the signing workflow; Zmail supplies the deployment, domain, storage, mail delivery and brand. A digital signature workflow can support evidence, but enforceability still depends on the document, parties and applicable law.

View the upstream source
START SMALL. OWN MORE.

A signature request should feel as simple as an email.

Open zSign, prepare a document and move the agreement forward.

Open zSign