Really Simple Licensing (RSL) is an open content licensing standard that enables web publishers to establish specific terms for how web crawlers collect data used in training generative artificial intelligence models.
Web publishers and technology professionals concerned with intellectual property rights and the use of online content for AI development would read this, often alongside discussions about digital copyright or web crawling standards.
External context
For a publisher working on their own pages, RSL offers a clear way to set usage rules for external parties. Managed by the nonprofit RSL Collective, which was co-founded by Eckart Walther and Doug Leeds, it allows sites to define how their content can be used when gathering training data. Major companies such as Reddit, Yahoo, and Medium were among the initial participants at its launch on September 10, 2025.
Really Simple Licensing Wikipedia contributors, “Really Simple Licensing”, en.wikipedia.orgLicence01What it is and how it works
RSL is a legal wrapper that replaces long, multi‑clause agreements with a single paragraph. The license states a fixed price, the permitted use cases (e.g., internal analytics, product features), and a brief attribution requirement. Because the text is short, developers can embed the license directly in code comments or a LICENSE file without needing a lawyer to explain each clause. The model itself does not change; only the permission to use it is simplified. In practice, a brand that adopts RSL can download the model, integrate it, and start serving users after paying the agreed amount.
RSL lets you pay one fee and use the AI asset; the contract is short and easy to read.
02What to do about it
If you encounter an AI asset offered under RSL, follow these steps this week: 1. Locate the LICENSE file or the license URL in the repository. 2. Verify the flat fee amount and the list of allowed use cases. 3. Add the exact license text to your project’s root folder and reference it in your README. 4. Update your internal compliance checklist to include a line for “RSL compliance”. 5. If the fee has not been paid, contact the vendor’s sales contact and request an invoice. 6. Document the attribution format (usually a line like “Powered by [Vendor] under RSL”) in your UI copy.
- Locate the license file.
- Confirm fee and allowed uses.
- Add the license text to your repo.
- Record attribution in UI.
- Pay the fee if missing.
03How it is measured or noticed
RSL shows up in three places that auditors or search crawlers can spot: A `LICENSE` file that contains the phrase “Really Simple Licensing”. A schema.org license property on a web page, e.g., `. * An attribution line in the UI that matches the vendor’s template. When you run a site audit, look for those markers. Tools that read structured data will surface the license` property, making it easy to confirm that the asset is covered by RSL.
How the record puts it
Really Simple Licensing (RSL) is an open content licensing standard that allows web publishers to set terms for web crawlers gathering training data for generative AI use.
04Common mistakes
- Assuming RSL also covers the underlying training data – it only covers the model or dataset you downloaded.
- Skipping the attribution line because the license text is short – the attribution clause is mandatory.
- Treating RSL as an open‑source license – you cannot redistribute the model without a separate agreement.
- Paying the fee once and then re‑using the model after the license term expires – RSL is time‑bound unless renewed.
05Limits
RSL does not apply when a brand wants to sell the AI model to third parties; a commercial resale license is required. It is also not the same as a public‑domain dedication, so you cannot claim the model is free for any purpose. Confusion often arises with “Simple License” schemes that are merely permissive open‑source licenses; RSL always includes a fee component and a defined usage scope.
06Worked example
"By paying $5,000 you receive a non‑exclusive, worldwide right to embed the XYZ model in up to 10 products for internal use. You must display the attribution ‘Powered by XYZ under Really Simple Licensing’ in each product UI. The license is valid for 12 months and renews automatically unless cancelled."
The entry above is written by GetLoopLoop. What follows is what independent catalogues hold about the same term — none of it is the source of this page.
- Also called
- RSL
- Kind of thing
- technical standard
The same term on Wikipedia
Catalogued in 2 languagesFrequently asked questions
How does Really Simple Licensing differ from traditional multi‑clause AI model licenses?
It depends on the structure of the agreement. RSL replaces a long, multi‑paragraph contract with a single, flat‑fee paragraph, while traditional licenses contain many clauses covering usage, redistribution, liability, and more.
Should a brand use RSL when it only needs to embed an AI model in internal tools?
Usually it is a good fit. RSL grants a straightforward, flat‑fee right for internal use, avoiding the overhead of negotiating complex terms, as long as the brand does not intend to sell the model externally.
Who creates the RSL text and what key elements does it contain?
The license is typically drafted by the asset owner or their legal team. It includes a brief statement of the flat‑fee right, a reference to the specific model or dataset, and a clause that the license is non‑transferable without a separate commercial resale agreement.
Does RSL still protect a brand if the AI model is later redistributed by a third party?
No, it does not cover that scenario. RSL is limited to the original licensee’s use, and any commercial resale requires a separate resale license.
What are the risks of assuming RSL covers commercial resale of an AI model?
The main risk is a breach of the original licensing terms, which can lead to legal action or loss of access to the model. You would notice the problem when a third‑party buyer questions the right to sell the model and demands a proper resale agreement.
How quickly can search crawlers detect an RSL license after it is added to a repository?
It usually appears within a few hours to a day, depending on the crawler’s schedule. Auditors look for a LICENSE file that contains the phrase “Really Simple Licensing” to flag the asset.
Wikimedia Commons
Related visuals with source and licence credit
Asked out loud
spoken, not typedThe same term in the words somebody uses speaking to an assistant rather than typing into a box — written from the situation, which is why each one carries the situation it came from.
Yes, you can use it under a simple license if the LICENSE file contains the phrase “Really Simple Licensing”. That means the provider offers a flat‑fee right with a short legal text, so no lengthy agreement is required.
No, it does not. RSL only covers the licensee’s own use; selling the model to a client requires a separate commercial resale license.
It depends on the intended use. The simple license does not permit commercial resale, so using the model in a product you sell violates the terms and could lead to legal or access issues.