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Integrated AI, reviewable versions, and the room in one project.
Celtx puts screenwriting inside a broad browser production suite. Inkwell is the Celtx alternative for teams that want AI to analyze or revise the structured screenplay inside the project, with every proposed change reviewed beside named versions, parallel draft lines, semantic diffs, and collaborators.
Capability spectrum
First-class fills the bar. Partial is half. Empty is a real gap — not a muted icon you have to decode.
Named versions I can return to
Named save points
Live co-writing
Real-time collaboration
Both products support live co-writing. Inkwell connects that shared draft to named save points, parallel draft lines, and semantic diffs.
Reviewable AI in the draft
Agentic AI skill passes
Fountain-native writing
Fountain native
Browser-first for the room
Web-based
Not in this matrix: Locked production drafts, One-time or free start. Those jobs were not scored.
First-hour path
Switching is a file you can name, not a weekend of retyping.
Fountain from the Celtx screenplay you mean to keep.
Create the shared destination before the room rewrites.
Spot-check structure before treating the pages as canonical.
Preserve the Celtx baseline as an immutable save point.
Export PDF or Fountain on Free, or FDX on Writer and above, for the next system.
Stay on Celtx if the integrated schedule, budget, breakdown, and call-sheet workflow is the main reason your team chose the platform.
Switch when the room wants AI integrated with the structured screenplay, named history, and parallel takes more than an all-in-one scheduling and budgeting suite.
Yes. Start in the full Plot editor with a monthly AI allotment. Writer adds complete version control and FDX export; Pro adds production tools and collaboration for up to five people; Team adds workspaces, roles, and room-scale collaboration.
In Celtx's Film & TV Script Editor, download the screenplay as Fountain, then import the .fountain file from Plot's Import / Export menu. Name a save point before the first Inkwell edit so the Celtx export remains a restore point.
No. Plot covers screenplay writing, revisions, breakdown reports, locked pages, and delivery exports; it is not an all-in-one budget and scheduling suite. Keep Celtx if those connected pre-production modules are the deciding requirement.
