This analysis describes what Unreal Engine's agreement states, permits, or reserves. It does not constitute a legal determination about enforceability. Regulatory applicability and practical outcomes may vary by jurisdiction, enforcement context, and individual circumstances. Read our methodology
Many open-source libraries and tools commonly used in software development are GPL or LGPL licensed, meaning developers must carefully vet every third-party library they incorporate into Unreal Engine projects to avoid an inadvertent breach.
Developers and studios using Unreal Engine for commercial products may owe Epic either seat subscription fees or a 5% royalty on gross revenues above $1,000,000 per product, depending on how they use and distribute the engine. The agreement also prohibits using Unreal Engine or MetaHuman assets as training input for AI systems, which may affect studios exploring AI-assisted workflows. You can review the seat subscription exceptions in Section 6(b) to determine whether the personal, indie, educational, or non-commercial exemptions apply to your organization.
How other platforms handle this
You may not use Runway's tools to create content that promotes, glorifies, or facilitates acts of terrorism, mass violence, or genocide, or that could be used to provide material support to individuals or organizations engaged in such activities.
Customer will not, and will not permit any other person (including any End User) to: ... (d) attempt to reverse engineer, decompile, or otherwise attempt to discover the source code or underlying components (e.g., algorithms, weights, or systems) of the Mistral AI Products, including using the Outpu...
You may not use the Services to attempt to circumvent, disable, or otherwise interfere with safety-related features of the Services, including features that prevent or restrict the generation of certain types of content.
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"You may not, and may not permit others to, combine, Distribute, or otherwise use the Licensed Technology with any code or other content which is covered by a license that would directly or indirectly require that all or part of the Licensed Technology be governed under any terms other than those of this Agreement (those licenses, the 'Non-Compatible Licenses'). This means, for example, that you may not combine the Licensed Technology with code or content that is licensed under any of the following licenses: GNU General Public License (GPL), Lesser GPL (LGPL) (unless you are merely dynamically linking a shared library), or Creative Commons Attribution-ShareAlike License.— Excerpt from Unreal Engine's Unreal Engine EULA
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Many open-source libraries and tools commonly used in software development are GPL or LGPL licensed, meaning developers must carefully vet every third-party library they incorporate into Unreal Engine projects to avoid an inadvertent breach.
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