> For the complete user guide index, see [llms.txt](https://portraitresearch.com/documentation/llms.txt).

# Data sources

[Canonical page](https://portraitresearch.com/documentation/data-sources/)

Understand source categories, firm entitlements, licensing boundaries, and surface availability.

- [Data sources and access](https://portraitresearch.com/documentation/data-sources/overview.md): Understand Portrait source categories, how workflow and surface affect retrieval, and where firm entitlements or licences limit access.
- [Third Bridge](https://portraitresearch.com/documentation/data-sources/third-bridge.md): Learn how entitled Third Bridge expert-call content is available in Portrait and where licensing limits access or redistribution.