Mnemosyne is open source under the GNU Affero General Public License v3.0 (AGPL-3.0).
- Personal projects and learning
- Open-source projects (your project is also AGPL-compatible)
- Internal company use where the software is not offered as a service to third parties
- Academic and research use
- Evaluation and testing
- Embedding Mnemosyne in a proprietary (closed-source) product
- Offering Mnemosyne as part of a paid service (SaaS, API, hosted tool)
- Distributing Mnemosyne in a product where you cannot comply with AGPL-3.0 copyleft requirements
- Any use where you need a license grant that the AGPL does not provide
Contact Cast Rock Innovation L.L.C.:
- Email: support@castnettechnology.com
- Website: https://castnettechnology.com
Commercial licenses are negotiated on a per-case basis. We aim to be fair and accessible — our goal is to support the ecosystem, not to gatekeep.
Contributors to Mnemosyne sign a lightweight CLA that grants Cast Rock Innovation L.L.C. the right to offer contributions under both the AGPL-3.0 and commercial licenses. This is necessary for the dual-license model to work. The CLA is signed once via GitHub as part of your first pull request.