> For the complete documentation index, see [llms.txt](https://chat-sdk.gitbook.io/chat-sdk/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://chat-sdk.gitbook.io/chat-sdk/commercial.md).

# Commercial

- [Module Licensing](https://chat-sdk.gitbook.io/chat-sdk/commercial/module-licensing.md)
- [Consulting Charges](https://chat-sdk.gitbook.io/chat-sdk/commercial/consulting-charges.md)
- [Scalability and Cost](https://chat-sdk.gitbook.io/chat-sdk/commercial/scalability-and-cost.md)
- [Firebase vs. Firestream vs. XMPP](https://chat-sdk.gitbook.io/chat-sdk/commercial/firebase-vs.-firestream-vs.-xmpp.md)
- [Licensing FAQ](https://chat-sdk.gitbook.io/chat-sdk/commercial/licensing-faq.md)
- [Adding Modules from source](https://chat-sdk.gitbook.io/chat-sdk/commercial/adding-modules-from-source.md)