Pi-hole

Network-wide DNS server that blocks ads and trackers.

EUPL-1.2Strong copyleft

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 Yes, as long as you don't distribute it.
B2 Build your own product or service on top and offer it to customers as SaaS Yes Yes. Running it as a service is not distribution.
B3 Make a closed-source derivative and sell or distribute it No No. If you distribute it, the whole work must carry the same licence, with source.
B4 Use the project's name and trademark No No, not without permission. The licence covers the code, not the name or logo.

Keep in mind

There is a licence note for this product (e.g. parts under another licence or version-specific terms): read it and check the licence of the exact version you use.

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

European Union Public Licence 1.2 (EUPL-1.2)

Copyleft from the European Commission, available in all EU languages. Also applies when the software is made available over a network.

Pi-hole Core is EUPL-1.2 from version 3.0. Commits before v3.0 keep their earlier licences.

This is guidance, not legal advice (inte juridisk rådgivning). Check with a lawyer before deciding.

Sign in to see what the licence means for eight use cases – from internal self-hosting to offering the tool as a service.