AI Framework Licenses and Commercial Boundaries
A quick reference for the open-source licenses and commercial boundaries of CopilotKit, assistant-ui, and Mastra.
Quick conclusion
- CopilotKit: MIT License, commercial use allowed with copyright and license notices retained.
- assistant-ui: MIT License for the open-source library; Assistant Cloud is an optional hosted service.
- Mastra: core code can be used commercially; anything under ee/ is constrained by the enterprise license.
Mastra license boundary
Outside the ee/ directory, evaluate Mastra under Apache-2.0. If production uses enterprise auth, SSO, RBAC, ACL, FGA, or similar ee/ features, confirm enterprise authorization separately.
Selection reminder
For agents, workflows, tool calling, and model routing, Mastra core is usually permissive enough. Before formal commercial use, re-check the current upstream LICENSE / LICENSE.md.
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