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License & FAQ

Functional Source License (FSL-1.1-MIT) — Free for commercial applications, personal projects, education & SaaS.

Free & Royalty-Free

100% Free Commercial Embedding

Embed in desktop, mobile, backend servers, SaaS applications, and enterprise products with no royalties.

Future Open Source

Automatic MIT Conversion

Every release automatically and irrevocably converts to the permissive MIT License after 2 years.

Reseller Protection

Cloud Non-Compete Clause

Third parties cannot offer raw managed ULTSQL hosting (DBaaS) in direct competition with the author.

Frequently Asked Questions

What is the ULTSQL license? ▾
ULTSQL is licensed under the Functional Source License, Version 1.1, MIT Future License (FSL-1.1-MIT). Created by Sentry, the FSL is an established Fair Source standard that gives full source code access, permits commercial and SaaS use, and automatically converts to standard open-source MIT after 2 years.
Can I build and sell commercial software using ULTSQL? ▾
Yes. You can build and sell proprietary commercial applications, mobile apps, desktop software, and SaaS platforms powered by ULTSQL without paying licensing fees or royalties.
Is there any forced attribution (e.g. "Powered by ULTSQL")? ▾
No. Under FSL-1.1-MIT, there is no requirement to display "Powered by ULTSQL" badges or splash screens. You only need to retain standard copyright notices in source distributions as customary.
Do I have to open-source my own application? ▾
No. FSL-1.1-MIT does not require your application to become open source. You can keep your own application's code 100% proprietary.
Can I run ULTSQL on AWS, GCP, or Azure for my company? ▾
Yes. Internal and customer-facing application deployment is permitted on any cloud provider. The only restriction is offering ULTSQL itself as a commercial hosted DBaaS product to third parties in competition with the author.
What is the version license history? ▾
  • v1.0.0: MIT License
  • v1.0.1 – v1.0.17: BSD-3-Clause License
  • v1.0.18+: Functional Source License (FSL-1.1-MIT)

Functional Source License, Version 1.1, MIT Future License

Abbreviation: FSL-1.1-MIT

Copyright 2026 Om Patel <ompatel3158@gmail.com>

Licensor ("We")

The party offering the Software under these Terms and Conditions.

The Software

The "Software" is each version of the software that we make available under these Terms and Conditions.

License Grant

Subject to your compliance with this License Grant and the Patents, Redistribution and Trademark clauses, we hereby grant you the right to use, copy, modify, create derivative works, publicly perform, publicly display and redistribute the Software for any Permitted Purpose identified below.

Permitted Purpose

A Permitted Purpose is any purpose other than a Competing Use. A Competing Use means making the Software available to others in a commercial product or service that substitutes for the Software or offers substantially similar functionality as the Software.

Grant of Future License

We hereby irrevocably grant you an additional license to use the Software under the MIT license that is effective on the second anniversary of the date we make the Software available.