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Open Software License 3.0

OSL-3.0Network copyleft (AGPL)OSI-approved open-source licence

Copyleft that also applies when the software is offered over a network (like AGPL). Changes you offer as a service must be made available.

Verify with a lawyer. This is guidance, not legal advice. Check with a lawyer before deciding.

What the licence means per use case

The verdict applies to the licence family (Network copyleft (AGPL)). An individual product can have its own terms; you get the full per-product analysis when you sign in. Confidence: high.

Open Software License 3.0: verdict per use case
Use caseVerdictWhat it means
U1 Self-hosted, internal use, unmodified Allowed Free to run internally, unmodified.
U2 Self-hosted and modified Conditions apply If you modify it and users (employees too) reach it over a network, offer them your modified source.
U3 Novro hosts it for you (single-tenant) Allowed Unmodified is OK. Modified: the source must be offered to users.
U4 Shared multi-tenant instance Conditions apply As above; changes must be offered to all users.
U5 In your cloud, managed by Novro Allowed As GPL plus the network clause.
U6 Redistribution (builds, images, appliances) Conditions apply The whole work's source must be provided.
U7 Commercial use Allowed Commercial use is allowed.
U8 AI acceptable use (AUP, EU AI Act) Not applicable Not applicable to this licence type.

Building on it: what may you do?

Short answers based on the licence, for the version in the catalog.

  • B1 Change the code for internal use in your company Yes, with conditions Yes, but if staff or others reach it over a network they must be able to get your modified source.
  • B2 Build your own product or service on top and offer it to customers as SaaS Yes, with conditions Yes, but you must share your changes with the users (AGPL).
  • B3 Make a closed-source derivative and sell or distribute it No No. The derivative must carry the same licence and the source must be offered.
  • B4 Use the project's name and trademark No No, not without permission. The licence covers the code, not the name or logo.

This is guidance, not legal advice. Check with a lawyer before deciding.

Common pitfalls

  • Network clause: running a modified version as a service for others counts as distribution.
  • Incompatible with the GPL. Don't mix OSL and GPL code in one work.
  • The licence covers the code, not the trademark. Don't use the project's name or logo in a way that suggests an official product.

The licence text

Last reviewed:

Products in the catalog under OSL-3.0

This is guidance, not legal advice. Check with a lawyer before deciding.

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