Document signing infrastructure you can own

Build, send, embed, and verify signing workflows from one self-hostable platform, complete with APIs, webhooks, audit trails, and production-ready PDF signatures.

Start with Signa Read the docs

const response = await fetch(
  "https://signa.example.com/api/submissions",
  {
    method: "POST",
    headers: {
      "Content-Type": "application/json",
      "X-Auth-Token": process.env.SIGNA_API_KEY,
    },
    body: JSON.stringify({
      template_id: "tmpl_service_agreement",
      send_email: true,
      submitters: [
        { role: "Client", email: "ada@northstar.co" },
        { role: "Company", email: "legal@northstar.co" },
      ],
      metadata: { agreement_id: "AGR-2026-1842" },
    }),
  },
);

Signature request

Service agreement

In progress

Client

Ada Okafor

Completed · 09:42

Company

Legal team

Waiting to sign

Agreement ID

AGR-2026-1842

Delivery

Email · ordered

Built for the surfaces your team already ships

@signajs/reactReact NativeREST APIWebhooksSelf-hosted

Signing workflows, end to end

From source document to trusted evidence

Prepare reusable documents, route every signer, embed the experience, and retain a verifiable completion record without stitching together separate products.

Create your workspace Browse guides

Template builder
Turn PDF, DOCX, or HTML files into reusable templates with signer roles, fields, and rendered previews.
Explore
Signature requests
Route documents to one or many recipients by email or SMS, with signing order and live status tracking.
Explore
Embedded signing
Place hosted signing and builder flows inside React, React Native, or browser applications.
Explore
API and webhooks
Automate templates and submissions through REST, then continue workflows with signed delivery events.
Explore
Audit evidence
Preserve signer activity, device and delivery events, timestamps, and completed document records.
Explore
PDF trust
Create and inspect PAdES-style signatures, certificate chains, RFC 3161 timestamps, and LTV evidence.
Explore
Teams and access
Organize work with teams, roles, invitations, scoped API keys, and authenticator-app MFA.
Explore
Self-hosted control
Run with Docker, PostgreSQL or SQLite, Redis, and local or S3-compatible document storage.
Explore

Built for integration

One signing engine. Every product surface.

Use the dashboard when humans need control, REST when systems need automation, and supported embeds when signing belongs inside your own experience.

DocuSeal-compatible REST shape
HMAC-signed webhooks
Web and mobile embeds
Scoped API keys

Explore the API

POST /api/submissions · 201 CREATED · REQUEST AGR-2026-1842 · EMAIL QUEUED · POST /api/submissions · 201 CREATED · REQUEST AGR-2026-1842 · EMAIL QUEUED

WEBHOOK submission.completed · HMAC VERIFIED · DELIVERY 200 · ATTEMPT 1 · WEBHOOK submission.completed · HMAC VERIFIED · DELIVERY 200 · ATTEMPT 1

PDF SIGNED · BYTE RANGE VALID · TIMESTAMP PRESENT · AUDIT LOG ATTACHED · PDF SIGNED · BYTE RANGE VALID · TIMESTAMP PRESENT · AUDIT LOG ATTACHED

const response = await fetch("/api/submissions", {
  method: "POST",
  headers: {
    "Content-Type": "application/json",
    "X-Auth-Token": process.env.SIGNA_API_KEY,
  },
  body: JSON.stringify({
    template_id: "tmpl_service_agreement",
    send_email: true,
    submitters: [
      { role: "Client", email: "ada@northstar.co" },
      { role: "Company", email: "legal@northstar.co" },
    ],
  }),
});

Service agreement

1 of 2 completed

Request created Two signers added.
Mar 12, 08:15 AM
Invitation delivered Client opened the email.
Mar 12, 09:47 AM
Form viewed Signing session started.
Mar 12, 09:50 AM
Client completed Evidence recorded.
Mar 12, 3:30 PM
Company pending Next signer notified.
Mar 14

Every request stays observable

Follow a document from creation through delivery, signing, completion, and downstream webhook processing.

Template builder: Turn PDF, DOCX, or HTML files into reusable templates with signer roles, fields, and rendered previews.
Signature requests: Route documents to one or many recipients by email or SMS, with signing order and live status tracking.
Embedded signing: Place hosted signing and builder flows inside React, React Native, or browser applications.
API and webhooks: Automate templates and submissions through REST, then continue workflows with signed delivery events.

@signajs/reactEmbed the signing form or template builder in your product.View embed options

Trust you can inspect

Evidence that travels with the document

Signa records signer intent and activity, protects completed PDFs, and exposes verification details for teams that need more than a completion badge.

Review trust and compliance

Ordered audit trail: Capture signing, delivery, webhook, device, and session events in one record.
Document integrity: Verify signed byte ranges, CMS signatures, signers, and signing times.
Certificate evidence: Inspect trust chains, RFC 3161 timestamps, and DSS/VRI LTV status.
Policy controls: Require MFA, signing reasons, signer IDs, or authenticated downloads.

Workflow recipes

Compose Signa around the way you already work

Use the same API and embed surfaces for preparation, delivery, signing, verification, and completion events.

const form = new FormData();
form.append("name", "Service agreement");
form.append("documents", contractFile);

const template = await fetch(
  "https://signa.example.com/api/templates/pdf",
  {
    method: "POST",
    headers: { "X-Auth-Token": process.env.SIGNA_API_KEY },
    body: form,
  },
).then((response) => response.json());

Create reusable signing schemas from PDF, DOCX, or HTML source documents.

Assign fields to named signer roles.
Inspect rendered pages before sending.
Organize templates into folders.

Deployment control

Run Signa where your documents, identities, and retention policies already live.

Start on SQLite, move to PostgreSQL, keep blobs local or in S3-compatible storage, and connect the mail, SMS, OAuth, and queue providers your environment requires.

Read the self-hosting guide

YOUR INFRASTRUCTURE · YOUR SIGNING STACK

Compare signing platforms