SerialRUN License - BSL 1.1 Source Available

What is BSL 1.1?

The Business Source License 1.1 (BSL 1.1) is a "source available" license created by MariaDB. It allows you to view, use, and modify the source code, but restricts commercial use for a specified period. After the change date, the license automatically converts to a permissive open source license (MIT).

What You Can Do

View and study the full source code
Use SerialRUN for personal and internal business purposes
Modify the source code for your own use
Contribute improvements back to the project
Distribute unmodified copies to others

What You Cannot Do

Offer SerialRUN as a commercial hosted service (SaaS)
Sell modified versions of SerialRUN
Use the SerialRUN name or branding in competing products

Open Source Components

The following crates are available under BSL 1.1 and will convert to MIT after the change date:

Component	License	Status
`serialrun-core`	BSL 1.1	Source Available
`serialrun-cli`	BSL 1.1	Source Available
`serialrun-mcp`	BSL 1.1	Source Available
`serialrun-plugin-api`	BSL 1.1	Source Available
`serialrun-gui`	BSL 1.1	Source Available

BSL 1.1 vs MIT vs Proprietary

Action	BSL 1.1	MIT	Proprietary
View source code	✓	✓	✗
Personal / internal use	✓	✓	✓
Modify for own use	✓	✓	✗
Sell modified versions	✗	✓	✗
Offer as SaaS	✗	✓	✗

Conversion to MIT

On the change date, all SerialRUN source code automatically converts to the MIT license. After that, you can use, modify, and distribute the code for any purpose, including commercial use.

Change Date

4 years from initial publication. SerialRUN v0.1.0 was published on May 31, 2026. The code will convert to MIT on or after May 31, 2030.

Full License Text

For the complete legal text, see:

https://mariadb.com/bsl11/

Or read the LICENSE file in the repository root.