Create better demo and training videos with AI

Lassu captures your raw ideas and turns them into polished product demo or training videos with documentation.

A trainer talking into a microphone at her desk, between a typed transcript with the filler words struck out and a note that reads Hola, Hallo, Ciao

Used by people from

Say it however it comes out

Lassu keeps what you meant, drops the ums and retakes, and rewrites the rest into a clear script read by a natural voice.

A rough transcript with the ums, retakes and filler words struck out, beside the four-step script Lassu wrote from it: 24 seconds shorter, with 3 retakes and 9 filler words removed.

Lassu turns the way your team already works into knowledge people can learn from and AI can use.

What every recording becomes

A natural voice, in your team’s languages

Keep your own voice or switch to a clear AI narrator, then publish the same video in French, Spanish, German and more.

A narration card for the AI voice Luna, warm and clear, in folders for English, French, Spanish and German

The guide writes itself

Every recording also becomes a step-by-step guide with screenshots. Need an FAQ, a job aid or release notes? They come from the same take.

A step-by-step guide titled Approve a vendor invoice, with tabs for an FAQ, a job aid and release notes, and its first step's screenshot from the recording

Knowledge from every recording

Searchable to the word

Every word is transcribed and searchable, so anyone can find a step and jump to the moment it’s explained.

A search for approve invoice that finds 3 moments in 2 videos, with a preview that jumps to 0:21

Ready for your AI tools

Each video comes with a summary, chapters and a transcript that your own tools can read through the Lassu API.

Shared on your terms

Keep a video to your workspace, share it with the people you add, or with anyone who has the link.

Works where your
team works

  • Mac Desktop app
  • Windows Desktop app
  • Chrome Extension
  • Slack Watch in Slack
  • Claude Code and Desktop
  • Codex Over MCP
  • Cursor Over MCP
  • Gemini CLI Over MCP

Ready for the whole company

  • Workspaces for every team

    Separate libraries, members and settings for each team.

  • You decide who watches

    Share with your workspace, with chosen people, or with anyone who has the link.

  • API and webhooks

    Connect your own tools, and get a webhook the moment something changes.


Your experts already know how.
Lassu makes it teachable.