# ZeroTier SOURCE-AVAILABLE LICENSE
Version 1.0
Copyright (c) 2025 ZeroTier, Inc.

## DEFINITIONS

"Software" means ZeroTier and all associated documentation, source code, object code, and any derivatives thereof.

"Non-Commercial Use" means use of the Software solely for:
- Personal, non-commercial purposes, in a non-commercial environment
- Educational or academic research purposes (for students, not for organizational use)
- Evaluation purposes for a period not exceeding 30 days

"Commercial Use" includes, but is not limited to:
- Any use of the Software by or for the benefit of a for-profit company
- Any use of the Software by or for the benefit of a government or military entity
- Any use of the Software by or for the benefit of a non-profit organization, or registered charity
- Use in a production, staging, or development environment for business purposes

- Offering paid or unpaid services powered by the Software
- Incorporation of the Software into any paid or unpaid product, platform, distribution or service

## LICENSE STRUCTURE

This software distribution includes components governed by different license terms:

- The "ZeroTier Agent" component is licensed under the Mozilla Public License 2.0 (MPL-2.0). See the LICENSE-MPL.txt file in project root for details.
- The "Controller" and other related components, located in the “nonfree” source directory, are licensed under this Source-Available License for Non-Commercial Use. Use of any of these components for Commercial Use requires a separate commercial license agreement with ZeroTier, Inc.

## GRANT OF LICENSE

### Non-Commercial License Grant
Permission is hereby granted, free of charge, to any person obtaining a copy of this Software, to use, copy, modify, and distribute the Software for Non-Commercial Use only, subject to the following conditions:
1. The above copyright notice and this license shall be included in all copies, modified versions and redistributions, in whole or in part of the Software.
2. The Software may not be used for Commercial Use without obtaining a separate commercial license.
3. Any modifications to the Software must be clearly noted in both the source code and documentation as such and must not be misrepresented as the original Software.
4. If you distribute the Software or any derivative works, you must retain all copyright, trademark, attribution notices, and this license text.

### Commercial License Requirement

ANY COMMERCIAL USE OF THIS SOFTWARE REQUIRES A SEPARATE COMMERCIAL LICENSE.

To obtain a commercial license, please contact:
sales@zerotier.com
https://www.zerotier.com/

## RESTRICTIONS
You may NOT:
- Use the Software for Commercial Use without a commercial license
- Remove or alter any proprietary notices, copyright or trademark statements, headers, metadata, logos, branding or other identifying information in the Software
- Use the trademarks, service marks, trade names, logos, or other brand identifiers of the copyright holder in a manner likely to cause confusion about the source, sponsorship, or endorsement of the Software without prior written permission
- Imply endorsement by the copyright holder, directly or indirectly, without written permission

## RESERVATION OF RIGHTS

All rights not expressly granted herein are reserved by the copyright holder. No rights or licenses are granted by implication, estoppel, or otherwise.

## NO PATENT LICENSE

This License does not grant any rights under any patent owned or controlled by the copyright holder. To inquire about patent licensing, please contact: legal@zerotier.com

## CONTRIBUTIONS

If you contribute any code, bug fixes, or enhancements to the Software, you grant the copyright holder a perpetual, worldwide, royalty-free license to use, modify, reproduce, sublicense, and distribute such contributions for any purpose, including Commercial Use.

## DISCLAIMER
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.

## COMPLIANCE AND VERIFICATION

To ensure compliance with this License, you agree to provide, upon request, reasonable documentation demonstrating that your use of the Software qualifies as Non-Commercial Use. Failure to provide such documentation within 30 days may result in termination of this License.

## TERMINATION

This license automatically terminates if you:
- Use the Software for Commercial Use without obtaining a commercial license
- Fail to comply with any of the terms and conditions stated herein
- Initiate legal action against the copyright holder related to the Software
Upon termination, you must cease all use of the Software and destroy all copies in your possession.

## GOVERNING LAW
This License shall be governed by the laws of California, USA, without regard to conflict of law principles.

## ENFORCEMENT

The copyright holder reserves the right to enforce this License through legal or equitable remedies, including injunctive relief, in the event of a violation of its terms.

## ENTIRE AGREEMENT
This License constitutes the entire agreement between the parties concerning the use of the Software for Non-Commercial Use and supersedes all prior or contemporaneous agreements regarding such use.

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## NOTICE TO USERS

This Software is source-available, but it is not “open source” as defined by the Open Source Initiative.

The "ZeroTier Agent" component is licensed under the Mozilla Public License 2.0 (MPL-2.0).
The "Controller" and related components, located in the “nonfree” source directory, are licensed under this Source-Available License.

Commercial use, as defined above, requires a paid commercial license.

For inquiries, please contact:
sales@zerotier.com
Or visit: https://www.zerotier.com/
