OpenSign — Free, Open-Source E-Signature Platform
Send, sign and manage legally binding documents with full control over your data. Self-host or use the cloud — no per-seat lock-in.
A flagship open-source product from the Qik family.
OpenSign is the open-source electronic signature platform trusted by teams that want enterprise-grade signing without enterprise pricing or vendor lock-in. Upload a document, place fields, and collect legally binding e-signatures in minutes.
Because OpenSign is open source, you can self-host it on your own infrastructure for complete data sovereignty, or get started instantly in the cloud. Every signature is backed by a tamper-evident audit trail.
Key capabilities
Legally binding signatures
Compliant with ESIGN, UETA and eIDAS, with a complete, court-admissible audit trail for every document.
Reusable templates
Turn your most-used contracts into templates with pre-placed fields to send in seconds.
Workflow automation
Sequential and parallel signing orders, automatic reminders, and webhooks to connect your stack.
Self-hosted & private
Run OpenSign on your own servers to keep sensitive documents inside your perimeter.
Bulk send
Send the same document to hundreds of recipients at once for onboarding and HR paperwork.
Developer API
A clean REST API and SDKs to embed signing directly into your product.
Why teams choose open-source e-signature
Proprietary e-signature vendors charge per envelope and lock your documents inside their cloud. OpenSign flips that model: the core platform is free and open source, so you only pay for the infrastructure you choose to run.
For regulated industries — legal, healthcare, finance and the public sector — self-hosting means your contracts never leave your control. You own the database, the audit logs and the encryption keys.
Built for every signing workflow
From a single NDA to high-volume HR onboarding, OpenSign scales with you. Define signing orders, add witnesses, require ID verification, and route documents through approval steps before they reach signers.
Frequently asked questions
Is OpenSign really free?
Yes. OpenSign's core is free and open source. You can self-host at no licence cost, or use the managed cloud for convenience.
Are OpenSign signatures legally binding?
Yes. OpenSign supports legally binding electronic signatures compliant with ESIGN, UETA and eIDAS, with full audit trails.
Can I self-host OpenSign?
Absolutely. OpenSign is designed to be self-hosted so your documents and signing data stay on your own infrastructure.