In short
All four apps process selected text with a shortcut. Zack KI adds a chat for follow-up questions, files, screenshots and web search.
Comparison
| Khint | SnapContext | Rewrait | Zack KI | |
|---|---|---|---|---|
| Platforms | Windows and macOS | Windows | Windows, macOS | Windows |
| Start | Palette with saved prompts | Ctrl+Shift+number, right-click or voice | Ctrl+Shift+P | Alt+1 chat, Alt+3 and Alt+4 direct |
| Result | Back to your app or to Jira, Notion, Slack | Clipboard, paste yourself | Replaces the selection after preview | Replaces the selection or Insert from the chat |
| Chat with follow-up questions | Yes, about screen captures | No | No | Yes |
| Screenshots | Reads text in a screen region | Not documented | No | Yes, with image understanding |
| Files | Edits Word and PDF files | Right-click in Explorer | No | PDF, Office, images and text from Explorer |
| Web search with sources | Not documented | Not documented | Not documented | Yes |
| German interface | Not stated | No (English, French) | Not stated | Yes |
| Own API key or local model | Not stated | No | No | Yes |
Provider sources, 17 October 2026: khint.app, snapcontext.io, rewrait.com. We develop Zack KI.
History and privacy
Zack KI stores chat history locally. Your question and attachments are sent to the selected model provider for answers.
Related questions
Does Zack KI work like SnapContext’s numbered shortcuts?
Alt+3 and Alt+4 run Improve and Fix errors directly. Explain and Summarize can get their own shortcuts under Shortcuts in the settings, and you can change all four instructions.