Rights desk
License library
a2ally's reading of each published license version for seven uses: commercial use, deployment, modification, redistribution, sublicensing, AI model training and inference. A use a license does not clearly grant is never treated as permission, and a use whose treatment is legally unsettled is marked for human review.
Check a use against any of these with POST /v1/licenses/check, the check_license MCP tool, or a plain-English question on the Ask page.
Public domain
- CC0
Dedicates the work to the public domain: copyright and related rights are waived as far as the law allows, with a fallback license where they cannot be.
CC0-1.0 · prohibits: nothing we evaluate
- Unlicense
Dedicates the software to the public domain; anyone may use it for any purpose without conditions.
Unlicense · prohibits: nothing we evaluate
- PDDL 1.0
Places the database and its contents in the public domain as far as the law allows, with a fallback license.
PDDL-1.0 · prohibits: nothing we evaluate
Creative Commons
- CC BY 4.0
Share and adapt the material for any purpose, including commercially, as long as you give credit, link the license and say if you changed it.
CC-BY-4.0 · prohibits: sublicensing · needs review: AI model training
- CC BY-SA 4.0
Share and adapt for any purpose, including commercially, with credit; adaptations you share must carry the same or a compatible license.
CC-BY-SA-4.0 · prohibits: sublicensing · needs review: AI model training
- CC BY-NC 4.0
Share and adapt with credit, for non-commercial purposes only.
CC-BY-NC-4.0 · prohibits: commercial use, sublicensing · needs review: AI model training
- CC BY-ND 4.0
Share the material unchanged for any purpose, including commercially, with credit. Adaptations may be made for yourself but not shared.
CC-BY-ND-4.0 · prohibits: sublicensing · needs review: AI model training
- CC BY-NC-SA 4.0
Share and adapt with credit, for non-commercial purposes only; adaptations you share must carry the same license.
CC-BY-NC-SA-4.0 · prohibits: commercial use, sublicensing · needs review: AI model training
- CC BY-NC-ND 4.0
Share the material unchanged, with credit, for non-commercial purposes only. Adaptations may be made for yourself but not shared.
CC-BY-NC-ND-4.0 · prohibits: commercial use, sublicensing · needs review: AI model training
- CC BY 3.0
Share and adapt the work for any purpose, including commercially, as long as you credit the author and licensor, include the license (or its URI) and do not suggest endorsement.
CC-BY-3.0 · prohibits: sublicensing · needs review: AI model training
- CC BY-SA 3.0
Share and adapt for any purpose, including commercially, with credit; adaptations you distribute must carry this license, a later version, or a compatible license. The license of most Wikipedia text.
CC-BY-SA-3.0 · prohibits: sublicensing · needs review: AI model training
- CC BY 2.0
Copy, distribute, perform and make derivative works, including commercially, as long as you give the original author credit and include the license or its URI. Common on Flickr.
CC-BY-2.0 · prohibits: sublicensing · needs review: AI model training
Permissive software
- MIT
Deal in the software without restriction, including to use, copy, modify, merge, publish, distribute, sublicense and sell it, as long as the copyright and permission notice go with all copies or substantial portions.
MIT · prohibits: nothing we evaluate · needs review: AI model training
- MIT-0
Deal in the software without restriction, including to use, copy, modify, merge, publish, distribute, sublicense and sell it. Unlike MIT, no copyright or permission notice has to go with copies.
MIT-0 · prohibits: nothing we evaluate
- Apache 2.0
Use, reproduce, modify, sublicense and distribute for any purpose, with an express patent license; keep notices, include the license and mark changed files.
Apache-2.0 · prohibits: nothing we evaluate · needs review: AI model training
- BSD 2-Clause
Redistribute and use in source and binary forms, with or without modification, as long as the copyright notice, conditions and disclaimer are kept.
BSD-2-Clause · prohibits: nothing we evaluate · needs review: AI model training
- BSD 3-Clause
Redistribute and use with or without modification, keeping the notice, conditions and disclaimer; contributors' names may not be used to endorse your product.
BSD-3-Clause · prohibits: nothing we evaluate · needs review: AI model training
- ISC
Use, copy, modify and distribute for any purpose with or without fee, as long as the copyright and permission notice appear in all copies.
ISC · prohibits: nothing we evaluate · needs review: AI model training
- 0BSD
Use, copy, modify and distribute for any purpose, with or without fee. Unlike ISC, not even the copyright notice has to be kept.
0BSD · prohibits: nothing we evaluate
- Boost 1.0
Use, reproduce, display, distribute, execute and adapt the software for any purpose; source copies must keep the license and notices, compiled object code need not.
BSL-1.0 · prohibits: nothing we evaluate · needs review: AI model training
- zlib
Use for any purpose, including commercial, and alter and redistribute freely, as long as you do not misrepresent the origin, mark altered versions, and keep the notice in source distributions.
Zlib · prohibits: nothing we evaluate · needs review: AI model training
Copyleft software
- GPL 3.0
Run, study, change and share the software, including commercially. If you convey it or a work based on it, you must do so under the GPL with the corresponding source.
GPL-3.0-only · prohibits: sublicensing · needs review: AI model training
- LGPL 3.0
Use the library in any program, including proprietary ones; changes to the library itself, when conveyed, stay under the LGPL with source, and users must be able to relink a modified version.
LGPL-3.0-only · prohibits: sublicensing · needs review: AI model training
- AGPL 3.0
As the GPL, plus: if you modify the software and let users interact with it over a network, you must offer them its corresponding source.
AGPL-3.0-only · prohibits: sublicensing · needs review: AI model training
- MPL 2.0
Use, modify and distribute, including in larger proprietary works; files covered by the MPL that you change and distribute must stay under the MPL with their source available.
MPL-2.0 · prohibits: nothing we evaluate · needs review: AI model training
- GPL 2.0
Run, study, change and share the software, including commercially. If you distribute it or a work based on it, you must do so under the GPL with the corresponding source.
GPL-2.0-only · prohibits: sublicensing · needs review: AI model training
- GPL 2.0+
Run, study, change and share the software, including commercially. If you distribute it or a work based on it, you must do so under the GPL with the corresponding source. You may follow this version or any later version of the GPL.
GPL-2.0-or-later · prohibits: sublicensing · needs review: AI model training
- GPL 3.0+
Run, study, change and share the software, including commercially. If you distribute it or a work based on it, you must do so under the GPL with the corresponding source. You may follow this version or any later version of the GPL.
GPL-3.0-or-later · prohibits: sublicensing · needs review: AI model training
- LGPL 2.1
Use the library in any program, including proprietary ones; changes to the library itself, when distributed, stay under the LGPL with source, and users must be able to relink a modified library.
LGPL-2.1-only · prohibits: sublicensing · needs review: AI model training
- EPL 2.0
Use, modify and distribute, including commercially, with a patent license; modified files of the program you distribute stay under the EPL with source available, while separate modules you add may use other terms.
EPL-2.0 · prohibits: nothing we evaluate · needs review: AI model training
Open data
- ODbL 1.0
Use, share and adapt the database for any purpose; credit the source, keep adapted databases you publicly use open under the ODbL, and do not lock them away with technical measures without an open copy.
ODbL-1.0 · prohibits: sublicensing · needs review: AI model training
- ODC-By 1.0
Use, share and adapt the database for any purpose as long as you credit the source as specified.
ODC-By-1.0 · prohibits: sublicensing · needs review: AI model training
- CDLA Permissive 2.0
Use, modify and share the data for any purpose; when sharing the data, include the agreement. Results of computational use, such as trained models, carry no restrictions or obligations.
CDLA-Permissive-2.0 · prohibits: nothing we evaluate
Fonts
- OFL 1.1
Use, study, modify and redistribute the fonts, including bundled with commercial software; the fonts may not be sold by themselves, and modified versions may not use reserved font names.
OFL-1.1 · prohibits: nothing we evaluate · needs review: AI model training
AI model licenses
- Llama 3.1 Community
Use, reproduce, distribute, copy and modify the Llama 3.1 materials, including commercially, subject to the Acceptable Use Policy, attribution and naming duties, and a separate license for services above 700 million monthly active users.
LicenseRef-Llama-3.1-Community · prohibits: sublicensing · needs review: AI model training
- Gemma
Use, reproduce, modify, distribute and deploy Gemma and model derivatives, including commercially, subject to the Gemma Prohibited Use Policy, which you must pass on to anyone you distribute to.
LicenseRef-Gemma · prohibits: nothing we evaluate · needs review: AI model training
- CreativeML OpenRAIL-M
Use, reproduce, modify and distribute the model and its derivatives, including commercially, under use-based restrictions (Attachment A) that must be passed on in every distribution and derivative.
LicenseRef-CreativeML-OpenRAIL-M · prohibits: nothing we evaluate · needs review: AI model training
- BigScience OpenRAIL-M
Use, reproduce, modify and distribute the model and its derivatives, including commercially, under use-based restrictions (Attachment A) that must be included in every distribution and derivative.
LicenseRef-BigScience-OpenRAIL-M · prohibits: nothing we evaluate · needs review: AI model training
- Llama 3 Community
Use, reproduce, distribute, copy and modify the Llama 3 materials, including commercially, subject to the Acceptable Use Policy, a "Built with Meta Llama 3" display, a separate license above 700 million monthly active users, and a ban on using the materials or outputs to improve other large language models.
LicenseRef-Llama-3-Community · prohibits: sublicensing · needs review: AI model training
- Llama 3.2 Community
Use, reproduce, distribute and modify the Llama 3.2 materials, including commercially, on the Llama 3.1 terms (Acceptable Use Policy, "Built with Llama", 700 million user threshold), except that the multimodal (vision) models are not licensed to individuals domiciled in, or companies with a principal place of business in, the European Union.
LicenseRef-Llama-3.2-Community · prohibits: sublicensing · needs review: AI model training, production deployment
- Llama 3.3 Community
Use, reproduce, distribute, copy and modify the Llama 3.3 materials, including commercially, subject to the Acceptable Use Policy, a "Built with Llama" display, model naming, and a separate license above 700 million monthly active users.
LicenseRef-Llama-3.3-Community · prohibits: sublicensing · needs review: AI model training
- Mistral Research (MRL)
Use, modify and distribute the model and derivatives for research purposes only: no commercial use and no production deployment without a separate commercial license from Mistral AI.
LicenseRef-Mistral-Research · prohibits: commercial use, production deployment · needs review: AI model training
- Qwen License
Use, reproduce, modify and distribute the Qwen materials, including commercially, with attribution and the license passed on; above 100 million monthly active users you must request a separate license from Alibaba Cloud.
LicenseRef-Qwen · prohibits: nothing we evaluate · needs review: AI model training
- DeepSeek License
Use, reproduce, modify and distribute the model and derivatives, including commercially, under use-based restrictions (Attachment A) that must be passed on in every distribution.
LicenseRef-DeepSeek · prohibits: nothing we evaluate · needs review: AI model training
Source-available software
- Elastic 2.0
Use, copy, distribute and adapt the software, but do not offer it to others as a hosted or managed service, and do not circumvent license keys or remove notices.
Elastic-2.0 · prohibits: sublicensing · needs review: production deployment, AI model training
- BUSL 1.1
Copy, modify and redistribute the software for any purpose other than production use; production use is allowed only as the licensor's Additional Use Grant says. Each version converts to an open source Change License on its Change Date.
BUSL-1.1 · prohibits: nothing we evaluate · needs review: commercial use, production deployment, inference-time use (RAG, prompts, generation), AI model training
Readings version 2026-10-09 by the a2ally rights desk. The license text governs; this is not legal advice.
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curl -s -X POST https://www.a2ally.com/v1/accounts/signup -H "Content-Type: application/json" -d '{"accept_terms":true}'
export A2ALLY_API_KEY=rs_... # the api_key from the reply (shown once)
curl -s https://www.a2ally.com/v1/licenses/check -H "Authorization: Bearer $A2ALLY_API_KEY" \
-H "Content-Type: application/json" -d '{"license":"MIT","intended_use":{"commercial_use":true}}'