Cambium

Source

Cambium comes in two components and they carry two different licenses. The client is open source. The server is source-available. You may freely read it, use it, modify and distribute as you please. The one thing you may not do is sell Cambium hosting to other people.

Version 0.2.1 · SHA256SUMS

Cambium Client

This archive contains the source for both the desktop app and the CLI. Open source under the MIT License.

Source Archive

License

Cambium Server

This archive contains the Python scripts and they do not need to be compiled. Source available, but not open source. Read more about its license below.

Source Archive

License

Licensing

Below are summaries of what is permitted on each license, followed by the full text.

Cambium Client

MIT License

Open source. An OSI-approved license, unmodified.

You may

  • Use it for anything, commercial or not
  • Modify it and redistribute it, as source or as a binary
  • Build it into your own software, open or closed
  • Ship it without telling us or paying us

You must

  • Keep the copyright notice and the license with it

Cambium Server

Ridgeway Self-Host License 1.0

Source-available. Based on the Elastic License 2.0.

You may

  • Read, audit and modify every line of it
  • Self-host it free and forever, on your own hardware or on a machine you rent
  • Give your team, your contractors and your clients access to your server — any number of them, paid work or not
  • Run it for a class, a workshop or a game jam — tuition and course fees included
  • Redistribute it, modified or not, under these same terms

You may not

  • Run Cambium servers for other people as a hosted or managed service
  • Charge for access to a server you operate on someone else's behalf, whether billed directly or bundled into something else
  • Strip out the license, the copyright or the other notices

Ridgeway Self-Host License 1.0

Applies to Cambium Server.

Copyright © 2026 Ridgeway Interactive

This license is based on the Elastic License 2.0. It is not the Elastic License 2.0, and it is not endorsed by or connected to Elastic N.V.

"The software" is Cambium Server, including any portion of it, in source or in object form. By using the software, you agree to these terms.

Permission is granted, free of charge, to any person or organization obtaining a copy of the software, to use, copy, modify, distribute, and make available the software and works derived from it, for any purpose and for any number of users, subject to the conditions below.

You may not provide the software to third parties as a hosted or managed service, and you may not charge a fee, a subscription, or any other consideration — billed directly, bundled with other goods or services, or taken as a share of anything of value — for access to an instance of the software that you operate on someone else's behalf.

You may not alter, remove, or obscure any licensing, copyright, or other notice in the software, and any use of Ridgeway Interactive's trademarks is subject to applicable law.

Anyone you give any part of the software to must get a copy of this license with it. If you modify the software, the copies you distribute must state prominently that you have modified it.

Patents

Ridgeway Interactive grants you a license, under any patent claims Ridgeway Interactive can license, or becomes able to license, to make, have made, use, sell, offer for sale, import and have imported the software, in each case subject to the limitations and conditions in this license. This license does not cover any patent claims that you cause to be infringed by modifications or additions to the software. If you or your company make any written claim that the software infringes or contributes to infringement of any patent, your patent license for the software granted under these terms ends immediately. If your company makes such a claim, your patent license ends immediately for work on behalf of your company.

Termination

If you use the software in violation of these terms, such use is not licensed, and your licenses will automatically terminate. If Ridgeway Interactive provides you with a notice of your violation, and you cease all violation of this license no later than 30 days after you receive that notice, your licenses will be reinstated retroactively. However, if you violate these terms after such reinstatement, any additional violation of these terms will cause your licenses to terminate automatically and permanently.

Definitions

"Your company" is any legal entity, sole proprietorship, or other kind of organization that you work for, plus all organizations that have control over, are under the control of, or are under common control with that organization. "Control" means ownership of substantially all the assets of an entity, or the power to direct its management and policies by vote, contract, or otherwise. Control can be direct or indirect.

"Your licenses" are all the licenses granted to you for the software under these terms.

"Use" means anything you do with the software requiring one of your licenses.

The software is provided "as is", without warranty of any kind, express or implied, including but not limited to the warranties of merchantability, fitness for a particular purpose and noninfringement. In no event shall Ridgeway Interactive be liable for any claim, damages or other liability, whether in an action of contract, tort or otherwise, arising from, out of or in connection with the software or the use or other dealings in the software.

Explicitly permitted use

  • Running the software for yourself or your company, for any number of users, on hardware you own or rent from a third party.
  • Giving employees, contractors, freelancers, publishers, or clients access to your instance so that they can work on your projects, whether or not you are paid for that work.
  • Running it for a school, a course, a workshop, a bootcamp, or a game jam, and giving students or participants access to their own projects on it, whether or not they pay you tuition or fees.
  • Being paid to install, configure, migrate, or support an instance that someone else operates for themselves.
  • Distributing the software, modified or not, under these same terms.

The only thing this license withholds is the business of hosting Cambium for other people: selling access to servers you run on their behalf.

MIT License

Applies to Cambium Clients.

Copyright © 2026 Ridgeway Interactive

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

The Software is provided "as is", without warranty of any kind, express or implied, including but not limited to the warranties of merchantability, fitness for a particular purpose and noninfringement. In no event shall the authors or copyright holders be liable for any claim, damages or other liability, whether in an action of contract, tort or otherwise, arising from, out of or in connection with the Software or the use or other dealings in the Software.