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Real-time collab plus history that names moments.
WriterDuet is built around live co-writing and offers AI-assisted proofreading through ScreenplayProof. Inkwell supports the same room workflow while adding agentic AI that analyzes or revises the structured draft in place, named save points, draft lines, and semantic changes to the shared project.
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
Version history
WriterDuet keeps automatic history; Inkwell adds named, immutable save points you control.
Live co-writing
Real-time collaboration
Both support live co-writing; Inkwell layers save points and draft lines underneath.
Locked production drafts
Production workflows (locked scripts, revision colours, A-pages)
Both cover locked production scripts, coloured revisions, and A-pages. Inkwell ties those production states to the same structured save-point history that powers draft lines and semantic diffs.
Reviewable AI in the draft
Agentic AI skill passes
Fountain-native writing
Fountain native
One-time or free start
Free tier
Inkwell's free tier includes the full editor and 20 AI skill passes per month.
Browser-first for the room
Web-based, cross-platform
First-hour path
Switching is a file you can name, not a weekend of retyping.
FDX or Fountain from the draft you mean to keep.
Create the shared project before anyone rewrites.
Read the summary. Warnings are decisions, not noise.
A save point is the rollback if the first pass fails.
Export PDF or FDX when production asks — not before.
Stay on WriterDuet if live co-writing, conventional revision history, and AI-assisted proofreading cover the room, and you do not need in-project agentic AI, named milestones, alternate draft lines, or connected production work.
Switch when the room needs in-project agentic AI, named table-read versions, alternate draft lines, reviewable changes, and production continuity alongside live collaboration.
Yes — presence, comments, and shared projects. The collaboration guide covers invites and reads.
Use Fountain or FDX exports from WriterDuet and import via Plot's Import / Export menu.
