AGPL and commercial license

Copyright (C) 2026 Jonathan Ferreira da Conceição.

Umwelt is licensed under the GNU Affero General Public License, version 3 only (AGPL-3.0-only). The full text is in LICENSE and the copyright notice in NOTICE.

• Free games, mods, interactive fiction and tabletop play tools that make no money (no price, purchases, ads or paid content) may use Umwelt without releasing their own code, as long as they credit it: see the Umwelt Free Play Exception.
• Private or internal use, and projects released under the AGPL, need nothing more.
• Everything else that cannot comply with the AGPL, such as commercial products and hosted services, can obtain a commercial license. Development and prototyping are free; a license is needed only once a product is publicly released or can earn revenue, and released builds of a game stay distributable after a subscription ends. Prices and terms are in COMMERCIAL.md; contact@kallamo.com.

“Umwelt” and “Kallamo” are trademarks of their creator: a fork or redistribution must use its own name.