Probably

Direct the voice and the cast of every scene

Mark how each line should be said, cast the people in every scene with voices you hear first, and keep your presenters as personas in a Space.

First draft free, no credit cardEvery release

A Space's Personas page with its presenters, each with a headshot and a short description of how they look.
Released

Direct how each line is said

The script carries direction marks inline: the emotion, delivery and timing of each line. Type [ to add one, and the Writer adds them as it writes. Ask in the chat for a line to sound warmer or slower, and the change comes back as a revised mark.

Cast every scene

The Scenes tab shows who is in each scene and who speaks. Add a person by name and look, choose the scenes they appear in, and remove anyone without a line. The chat tells you the cast's limits before a brief runs into them.

Personas and voices

Save the people you cast as personas in a Space and use them again in any video. The voice picker plays a sample of each voice before you choose it.

Also new

  • Pay yearly: annual plans give the same credits each month and save over 10%.

Improvements and fixes

  • Dropdowns, radio groups, sliders and search fields look and work the same everywhere.
  • The sidebar has one toggle, a cleaner organization picker and clearer Spaces.
  • A click in the first moment after a page loads is never lost.

Keep reading

  • October 1, 2026

    Steer, review and share every video

    Change a video while it's being made, see what a change keeps and costs before you apply it, compare variants, and share the result with a link.

  • October 25, 2026

    Connect Probably to your AI tools and code

    Add Probably to Claude, ChatGPT or Cursor, or build on it with API keys, webhooks and a TypeScript SDK, all documented in the new developer docs.

  • October 23, 2026

    A Library that works like a file manager

    The Library now has tabs, folders, a table view and details beside it, and the Videos page filters, searches and sorts every video you've made.

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  • Research and a script
  • An actor and a voice
  • The edit, with captions
  • 480p, up to 30 seconds