Web-based
- Inkwell
- First-class
- Celtx
- First-class
Script-first IDE vs full production suite.
Celtx grew from screenwriting into a broader production management platform — scheduling, budgets, and breakdowns alongside the script. Inkwell stays focused on the screenplay as structured data with version control, semantic diffs, and reviewable AI skills. Here is where each tool wins.
Where Celtx is strongest
Where the IDE model changes the work
Version control, structured changes, and reviewable AI
Sixteen Fountain element types — the draft is queryable, diffable, and skill-ready.
A side-by-side look at where each tool stands today. Some Inkwell features are in active development — see the roadmap for current status.
Celtx's suite strength; Inkwell focuses on the script and revision pipeline.
| Capability | Inkwell | Celtx |
|---|---|---|
| Web-based | First-class | First-class |
| Screenplay formatting | First-class | First-class |
| Production scheduling / budgetsCeltx's suite strength; Inkwell focuses on the script and revision pipeline. | Not available | First-class |
| Version control with draft lines | First-class | Not available |
| Named save points | First-class | Partial or limited |
| Semantic change tracking | First-class | Partial or limited |
| Agentic AI skill passes | First-class | Partial or limited |
| FDX import / export | First-class | First-class |
| Fountain native | First-class | Partial or limited |
Feature and pricing details link to the first-party pages used for verification.
Choose Celtx when you want script + breakdown + schedule in one subscription from day one. Choose Inkwell when the screenplay is the source of truth — version control, room collaboration, and AI skills on structured Fountain data.
The Free plan includes the full editor and AI skill passes.