The short answer: OpenSign™ is free document signing software that handles the full lifecycle — upload, prepare, sign, send, track and store — with reusable templates, an audit trail, an API and multi-user teams. It's open source, so you can also self-host it.
What you get
- Sign yourself or request signatures from others.
- Reusable templates and bulk (quick) send.
- Multi-user teams with shared templates and roles.
- SSO for secure organization-wide access.
- REST API & webhooks to automate signing — see the API guide.
- Audit trail & certificate for every completed document.
Who it's for
- Freelancers sending contracts and invoices.
- Startups & SMBs standardizing on one affordable tool.
- HR teams handling offer letters and policies.
- Developers embedding signing into their own apps.
- Compliance-sensitive orgs that need to self-host.
How it compares to paid tools
Most document signing tools charge per user and gate templates, bulk send and API access. OpenSign includes these for free. See the full comparison of alternatives, or read why it's the best free DocuSign alternative.
Getting started
- Sign up free at OpenSign.
- Upload a document or create a template.
- Add fields and signers.
- Sign or send, then track to completion.
Ready to try it? Create a free OpenSign account and start signing documents in minutes — no credit card required. Prefer to run it yourself? OpenSign is 100% open source on GitHub.