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

# Product reference

[Canonical page](https://portraitresearch.com/documentation/reference/)

Check availability, surfaces, access, output formats, and canonical product terms.

- [Compare research tools](https://portraitresearch.com/documentation/reference/compare-research-tools.md): Choose between Easel, Deep Research, Screening, Monitors, and Charts based on the question and result you need.
- [Capabilities by surface](https://portraitresearch.com/documentation/reference/capabilities-by-surface.md): Compare the web app, iOS, MCP, Slack, Microsoft Teams, email, and CLI without assuming feature parity between surfaces.
- [Availability and access](https://portraitresearch.com/documentation/reference/availability-and-access.md): Distinguish product release status, account access, data entitlements, surface support, and remaining usage when an option is unavailable.
- [Research outputs and file formats](https://portraitresearch.com/documentation/reference/output-formats.md): Compare research outputs, copy controls, PDF exports, CSV and Excel downloads, and limits across Portrait workflows.
- [Product glossary](https://portraitresearch.com/documentation/reference/glossary.md): Find the canonical meaning of Portrait workflows, objects, outputs, surfaces, usage buckets, and access terms used throughout the guide.