Last updated: February 2026
SignIt is built upon DocuSeal, an open-source document filling and signing platform created by DocuSeal Co. We are grateful to the DocuSeal team and contributors for providing the foundation that powers SignIt's document signing capabilities.
DocuSeal is licensed under the AGPL-3.0 license. In compliance with this license, SignIt's source code is available to its users.
In addition to DocuSeal, SignIt relies on many other open-source projects. We are grateful to their authors and communities. Key dependencies include:
| Package | License |
|---|---|
| DocuSeal | AGPL-3.0 |
| Ruby on Rails | MIT |
| PostgreSQL | PostgreSQL License |
| Redis | BSD-3-Clause |
| PDF.js | Apache-2.0 |
| Tailwind CSS | MIT |
| Lucide Icons | ISC |
The SignIt name, logo, and visual identity are trademarks of SignIt. All rights reserved.
If you discover a security vulnerability in SignIt, please report it responsibly by emailing security@trysignit.com. Please do not disclose vulnerabilities publicly until we have had a chance to address them.
For questions about open-source licensing or third-party software, contact us at legal@trysignit.com.