Umwelt Commercial License
Umwelt is licensed under the GNU Affero General Public License, version 3 only (the “AGPL”), with the Umwelt Free Play Exception. A commercial license lets you use Umwelt in a product without meeting the AGPL’s conditions, such as releasing your own source code.
The Copyright Holder is Jonathan Ferreira da Conceição, or any legal entity he designates to hold Umwelt’s intellectual property, as in the Free Play Exception. Commercial licenses are granted by the Copyright Holder.
This page states the terms on which the Copyright Holder offers commercial licenses. It is written to be fair and readable, not to catch anyone out. When you buy a license, your contract is with Jonathan Ferreira da Conceição, and buying or renewing it means you accept these terms. If a signed agreement exists between you and the Copyright Holder, that agreement prevails over this page.
Our order process is conducted by our online reseller Paddle.com. Paddle.com is the Merchant of Record for all our orders. Paddle handles payment, taxes, invoices and refunds, under its buyer terms.
1. Who needs one
You do not need a commercial license for:
- Development, prototyping and testing. Using Umwelt internally, and sharing builds privately with testers, partners, publishers or press who receive them free of charge and without public access, is free.
- Free play works that meet the Umwelt Free Play Exception.
- Projects released under the AGPL, or under a license that allows combining with it.
You need a commercial license from the moment a product that includes, links to, embeds or communicates with Umwelt is publicly released or can earn revenue, and you do not wish to meet the AGPL’s conditions for it.
2. Prices
Prices are per company, per year, in US dollars, before applicable taxes, which Paddle adds at checkout where required. A license renews each year unless you cancel it. One license covers every product of the company in its category.
Games and other play works (as defined in the Free Play Exception) that earn money:
| Annual revenue and funding | Price per year |
|---|---|
| No monetization | Free (Free Play Exception) |
| Up to US$ 100,000 | US$ 99 |
| Up to US$ 500,000 | US$ 999 |
| Up to US$ 1,000,000 | US$ 2,499 |
| Above US$ 1,000,000 | By agreement |
Everything else, such as applications, hosted services, products with characters or conversations powered by artificial intelligence, and tools for other developers:
| Annual revenue and funding | Price per year |
|---|---|
| Up to US$ 100,000 | US$ 499 |
| Up to US$ 500,000 | US$ 1,999 |
| Up to US$ 1,000,000 | US$ 4,999 |
| Above US$ 1,000,000 | By agreement |
A product that is a play work and also offers Umwelt’s capabilities to others as a service (for example, selling access to its characters through an API) belongs to “everything else”.
Redistributing Umwelt as part of another engine, framework or development kit, service level agreements and priority support are always by agreement.
3. Revenue and funding
- Revenue is the gross revenue of your company, together with every entity it controls, is controlled by or is under common control with, over the last twelve months, from any source, not only from products using Umwelt.
- Funding is money raised over the last twelve months from investors, grants or loans. The tier is set by revenue or funding, whichever is greater.
- You state your tier when you buy or renew. Growing past your tier during a year costs nothing extra: you move to the new tier at your next renewal.
4. How long a license is needed
Games and other play works: released builds are yours to keep.
- Every build of a game or other play work that you released while your license was active may be distributed and sold forever, in every store and platform, even after your subscription ends. This right survives the end of the subscription and cannot be withdrawn, except as section 7 states.
- An active subscription is required only while you develop the game with Umwelt or release new builds of it, including updates, patches, ports, downloadable content and new editions.
- A game’s own servers that keep running a build released under an active license count as part of that released build, not as a hosted service.
Everything else: a license is needed while the product is offered.
- A product in the “everything else” category needs an active license for as long as it is sold, distributed, or run as a service for its users, whether or not it receives updates.
- When the license ends, copies already delivered to customers stay theirs to use, but no new copies may be sold or distributed, and a hosted service must stop using Umwelt.
5. What the license grants
While it is active, and for released builds as section 4 states, a commercial license lets you:
- use, link, embed and distribute Umwelt (the engine, its libraries, the command-line tool, the native library and the official client libraries) as part of your products, under terms of your choice;
- modify Umwelt for those products without releasing your modifications;
- let contractors and publishers work on your products under your license.
It does not let you:
- sell, sublicense or redistribute Umwelt on its own, or as part of an engine, framework or development kit for other developers, unless agreed in writing;
- use the Umwelt or Kallamo names or logos except in the credit notice below or to state accurately that your product uses Umwelt;
- transfer the license, except together with the product it covers, for example when the product or your company is sold;
- use Umwelt for unlawful purposes, or to infringe the intellectual property of others.
Credit. Every product covered by a commercial license shows, in its credits or its “about” screen, a notice like:
Uses Umwelt by Kallamo (https://kallamo.com/umwelt).
Where a product has neither, such as a library or a hosted service, the notice goes in its documentation or its main description page.
A license is not a sale: the Copyright Holder keeps every right in Umwelt, its code and its names.
6. Honesty, not audits
Your tier is based on your own statement. The Copyright Holder may ask, at most once a year, for a short written confirmation of your revenue and funding. There are no on-site audits and no access to your books. A statement made in good faith that turns out to be wrong is settled by paying the difference for the current year, with no penalty.
7. Ending
- You may stop renewing at any time. For games and other play works, section 4 keeps your released builds distributable; for everything else, section 4 states what stops.
- If you do not pay, knowingly misstate your tier, or seriously breach these terms, and do not fix it within 30 days of written notice, the license ends. A payment that is fraudulent or charged back ends it at once. Builds released while it was active and paid for remain covered.
- Copies already delivered to your players or users are never affected.
8. Changes to these terms
The Copyright Holder may change prices and terms for future purchases and renewals. A change never affects a year already paid, nor builds already released.
9. Warranty
Umwelt is provided “as is”, without warranty of any kind, as the AGPL states. The Copyright Holder’s liability under a commercial license is limited to the amount paid for it in the last twelve months. Warranties, indemnities and support beyond this are available only by agreement.
10. Refunds
- You may ask for a full refund of any payment, including a renewal, within 14 days of the payment date, for any reason. Write to contact@kallamo.com, or ask Paddle through the link in your order email or at https://paddle.net.
- A refunded license is treated as never bought: the rights of section 4 do not cover builds released under it.
11. Contact
To buy a license: https://kallamo.com/umwelt/license/
To ask a question: contact@kallamo.com.