InkwellInkwell vs WriterDuet
WriterDuet is a collaboration-first, cross-platform tool. Inkwell is a Mac-native editor with a built-in AI assistant for writers working on their own scripts.
| Feature | Inkwell | WriterDuet |
|---|---|---|
| Price | The full editor is free. Pro ($10/month or $100/year) only adds more Quill credits. | Free (3 projects); Plus $9.99/mo, Pro $11.99/mo, Premium $13.99/mo. |
| Built-in AI assistant | ✓Quill, with an approve/reject diff for every suggestion. | ~Collaboration-focused; AI is not its central feature. |
| Platforms | Native macOS app. | Web browser, desktop (Mac/Windows), and mobile. |
| Real-time collaboration | —Single-writer focused today. | ✓Real-time multi-writer collaboration (its headline feature). |
| File formats | ✓Fountain and Final Draft (.fdx) import and export. | ✓Industry-standard formatting; Final Draft and Fountain supported. |
| Offline writing | ✓Fully offline; internet only needed to ask Quill. | ~Offline desktop writing on paid plans. |
WriterDuet offers a free tier (3 projects) and paid plans — Plus ($9.99/mo, which adds unlimited projects, real-time collaboration, and offline desktop writing), Pro ($11.99/mo), and Premium ($13.99/mo). It runs in the browser with desktop and mobile apps. Facts current as of June 2026; check writerduet.com for the latest.
Choose WriterDuet if
- You co-write in real time with collaborators.
- You need to write across the web, Windows, Mac, and mobile.
- Your team is already standardized on WriterDuet.
Choose Inkwell if
- You want a built-in AI assistant that suggests but never auto-writes.
- You write solo and want a fast, native, offline-first Mac editor.
- You prefer one simple price over per-tier collaboration plans.
- You move scripts between Fountain and Final Draft (.fdx).
WriterDuet's standout feature is real-time collaboration: multiple writers editing the same script at once, in the browser or a desktop app, across Mac, Windows, and mobile. If your work is fundamentally collaborative, that's a strong fit.
Inkwell is built for the solo writer. It's a native macOS app with Quill, an AI assistant that brainstorms, edits, and polishes alongside you. Every suggestion is a diff you approve or reject. It works fully offline and reads and writes both Fountain and Final Draft (.fdx).
The choice is your workflow: real-time co-writing across platforms, or focused solo writing on a Mac with AI you control.
Bring a script over and see.
The full editor, unlimited scripts, and Fountain and Final Draft import are free. Move a script over from WriterDuet and see how Quill works.