Huffl (https://huffl.ai/) is a text editor, whiteboard, and presentation builder, with a chatbot with web search.

On the same interface: Page (blocks, tables, spreadsheets, LaTeX, graphs), Whiteboard (post-its, shapes, mind maps) and Presentation.
The chatbot acts on the active workspace.

Text and image generation, multiple writing styles. Documents accepted.
Lenses review work in progress and suggest corrections.

Export DOCX, PDF, HTLM and PPTX.
Collaboration with reader or publisher rights, comments, publication on web page.

Choice of a model from Claude, GPT or Gemini.

Note: Editing works offline but AI requires a login.

In the free plan, 6 AI messages per day, 1 AI presentation per month, text and image generation.