# Casso

> Agent-agnostic numbered screen annotations for coding agents.
> Desktop app (Mac now, Windows soon). Screenshots stay local. 7-day free trial, then $29 one-time personal license.

Casso is a menubar desktop app. Draw numbered boxes on any screen, add optional notes, capture an annotated composite plus crops, and paste a lean prompt into Claude Code, OpenAI Codex, Cursor, Grok CLI, or any agent that accepts images or file paths.

## Product
- Homepage: https://usecasso.app/
- Download: https://usecasso.app/download
- Pricing: https://usecasso.app/pricing
- About: https://usecasso.app/about
- Support: https://usecasso.app/support
- Blog: https://usecasso.app/blog

## Agent guides
- Index: https://usecasso.app/for
- Claude Code: https://usecasso.app/for/claude-code
- OpenAI Codex: https://usecasso.app/for/codex
- Cursor: https://usecasso.app/for/cursor
- Grok CLI: https://usecasso.app/for/grok

## How-tos
- Annotate for Claude Code: https://usecasso.app/blog/annotate-screenshots-claude-code
- Annotate for Codex: https://usecasso.app/blog/annotate-screenshots-codex
- Visual context guide: https://usecasso.app/blog/visual-context-coding-agents

## Comparisons
- Index: https://usecasso.app/vs
- vs Agentation: https://usecasso.app/vs/agentation
- vs CleanShot X: https://usecasso.app/vs/cleanshot
- vs SlimSnap: https://usecasso.app/vs/slimsnap

## Key facts
- Draw numbered boxes; optional per-box notes
- Session files: full.png, crops, full-annotated.png, prompt.md, manifest.json
- Clipboard handoff; optional auto-paste into the frontmost terminal
- No LLM calls inside Casso; annotations are not uploaded by Casso
- 7-day free trial for full desktop access (starts on first desktop sign-in)
- $29 one-time personal license (Mac + Windows); free updates through 1.x
- Not a subscription

## Machine-readable pricing
- https://usecasso.app/pricing.md

## Legal
- Privacy: https://usecasso.app/privacy
- Terms: https://usecasso.app/terms
- Cookies: https://usecasso.app/cookies

## Contact
- hello@usecasso.app