# Dual License

Copyright (C) 2026 Sterfive SAS — https://sterfive.com

This software is licensed under a **dual-license** model.
You may choose either license:

## 1. GNU Affero General Public License v3.0 (AGPL-3.0-or-later)

The full text of the AGPL-3.0 license is provided in the
[LICENSE-AGPL-3.0](LICENSE-AGPL-3.0) file.

This program is free software: you can redistribute it and/or
modify it under the terms of the GNU Affero General Public License
as published by the Free Software Foundation, either version 3 of
the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Affero General Public License for more details.

You should have received a copy of the GNU Affero General Public
License along with this program. If not, see
<https://www.gnu.org/licenses/agpl-3.0.html>.

## 2. Sterfive Commercial License

If the AGPL-3.0 terms do not fit your use case — for example, if
you need to:

- Use this software in **proprietary / closed-source** products
- Deploy as a service **without disclosing your source code**
- Remove the AGPL copyleft obligations
- Obtain **dedicated support and maintenance**
- Access **@sterfive/opcua-optimized-client** for enhanced
  performance (auto-batching, limit-splitting, hold-and-resume)

...you can acquire a **commercial license** from Sterfive SAS that
removes all AGPL restrictions.

### Obtain a Commercial License

  **Website**: https://sterfive.com
  **Email**:   contact@sterfive.com

## More Information

See [LICENSING.md](LICENSING.md) for a detailed plain-English guide
explaining what each license allows and when you need which.

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SPDX-License-Identifier: AGPL-3.0-or-later OR LicenseRef-Sterfive-Commercial