How We Evaluated

For each tool we asked: Is the free tier actually usable for a full-length script, or just a demo? Does it produce industry-standard formatting that won't embarrass you in a coverage pile? Can you collaborate with a co-writer? Does it run on the device you actually have? And is the free version going to be quietly shrunk in two years when the company raises another round?

1. Ensemble

Web · Free tier: unlimited projects, 20 pages each · Pro $9.99/mo

Ensemble is a modern, browser-based screenplay editor with industry-standard formatting, real-time collaboration, and AI-assisted shot lists. The free tier covers unlimited projects up to 20 pages each (good for short films, outlines, TV cold opens, and most pilot first acts); Pro lifts the cap to unlimited pages and unlocks the AI shot list generator.

Strengths: Generous free tier with no project cap. Real-time multi-cursor collaboration works on the free plan. Anonymous editing in the browser without an account. Clean, focused UI built for deep work. Read-aloud table read with nine voices. Visual scene arc and character database.

Weaknesses: 20-page-per-project cap on free tier means a full feature requires Pro. No native .fdx round-trip — you need to round-trip through Fountain to interop with Final Draft. Newer than the established players, so it doesn't yet have a multi-decade ecosystem.

Best for: Anyone starting fresh. Co-writers. Writers on Chromebooks or Linux. Indie filmmakers who want shot lists. Anyone who's bounced off Final Draft's price tag or WriterDuet's three-project cap.

2. WriterDuet (Free tier)

Web · Free tier: 3 projects · Pro from ~$11.99/mo

WriterDuet pioneered collaborative screenwriting in the browser and remains one of the most polished tools in the category. Native .fdx round-trip, in-app audio/video calls with your co-writer, and a mature formatting engine.

Strengths: Real-time collab is excellent. Native Final Draft (.fdx) compatibility. Decade-plus of refinement. In-app voice/video for co-writing sessions.

Weaknesses: Free tier capped at three projects, which makes it hard to use as a long-term home. Account required from the start. UI is dense and shows its age.

Best for: Writers who specifically need native .fdx round-trip and audio/video calls inside the writing app, and won't bounce off the three-project cap.

3. Trelby

Desktop (Windows/Linux) · Free, open source · No active development

Trelby is a free, open-source screenwriting application that's been around since 2011. It produces properly-formatted PDFs, runs on Windows and Linux (Mac via Wine or VMs), and has the no-nonsense feel of a tool built by writers for writers.

Strengths: Genuinely free forever. Open source. Clean output. Lightweight.

Weaknesses: Development has slowed dramatically — the last major release was years ago. No real-time collaboration. No web version. No Mac support without Wine. UI feels dated by modern standards.

Best for: Linux users who value open-source tooling and don't need collaboration or ongoing updates. Hobbyists writing solo who want something that works offline forever.

4. KIT Scenarist

Desktop + cloud (Win/Mac/Linux/iOS/Android) · Free open source; cloud features paid

KIT Scenarist (and its successor, Story Architect) is an ambitious open-source screenwriting suite with a script editor, character database, story planning tools, and statistics. Cross-platform including mobile.

Strengths: Free and open source. Cross-platform including iOS/Android. Built-in story planning, character cards, and statistics. Active development.

Weaknesses: Cloud sync and team features sit behind a paid plan. UI is feature-dense and can feel overwhelming for new writers. Some translations and docs lag the Russian-language source.

Best for: Writers who want a single offline tool that handles writing plus character and story planning, especially across platforms.

5. Causality

Desktop (Win/Mac/Linux) · Free non-commercial · Paid for commercial use

Causality is unusual: it combines a screenplay editor with a sophisticated visual story-development interface. You build the story structure with cards and timelines and watch the script update.

Strengths: A genuinely different way of thinking about story structure. Free for personal, non-commercial use. Lovely visual interface.

Weaknesses: Free license is non-commercial only — if you sell the screenplay you've technically violated the license. Steeper learning curve than a plain editor. No collaboration. Desktop only.

Best for: Writers who think visually about structure and want to outline at the same time as drafting. Hobbyists, not professionals.

6. Beat

Mac only · Free, open source

Beat is a free, open-source Fountain-first screenwriting app for macOS. Built by a working filmmaker, it's a quiet favourite of Mac-using writers who want something simpler than Highland 2.

Strengths: Free forever. Open source. Native Mac feel. Fountain-first. Genuinely actively maintained.

Weaknesses: Mac only — no Windows, Linux, or web version. Solo only, no collaboration.

Best for: Mac users who think in Fountain and want a free alternative to Highland 2.

7. Fountain.io / Plain Text

Any text editor · Free, no install · No formatting preview

Fountain is the open plain-text screenplay format. You can write a complete, industry-standard screenplay in any text editor — VS Code, Vim, Sublime, Notes.app — and convert it to PDF using a free tool when you're done.

Strengths: Maximum freedom. Plain-text files are forever — no proprietary lock-in. Works in any editor you already love. Git-friendly for version control.

Weaknesses: You don't see the formatted output until you render it. No collaboration built-in (though git works). No table read, no shot list, no anything beyond text.

Best for: Programmers and plain-text devotees who want full control. Often used in combination with another tool for final formatting and export.

8. Highland 2 (Free reader)

Mac only · Free read-only viewer; ~$49.99 for the editor

Worth a mention because the free version technically exists: Highland 2 from John August's company offers a free read-only mode and a paid full editor. Beautiful UI, deeply Fountain-first.

Strengths: Best-in-class Fountain experience. Beautiful, minimal UI. Made by working screenwriters.

Weaknesses: The free tier is essentially a viewer — full editing is paid. Mac only. No collaboration.

Best for: Reading other writers' Fountain files for free; if you decide you love it, the paid editor is worth the money for Mac-only solo writers.

What About Final Draft, Fade In, and Celtx?

Final Draft ($249 one-time) and Fade In ($79.95 one-time) are paid products with demo/trial modes only — no real free tier. Final Draft remains the production-pipeline standard for established TV and film writers; see our Ensemble vs Final Draft and Ensemble vs Fade In comparisons.

Celtx began as free, open-source screenwriting software and over the years moved most features behind a $14.99+/month subscription pre-production suite. The current free tier is essentially a limited demo. See Ensemble vs Celtx for the full comparison.

Summary: Which One Should You Use?

If you want to start writing in the next sixty seconds: Ensemble. Open the site, start typing, no account needed.

If you're co-writing with someone: Ensemble (unlimited free projects) or WriterDuet (mature, .fdx-native, three free projects).

If you're on Linux and want offline open source: Trelby (mature but stagnant) or KIT Scenarist (broader feature set).

If you're on Mac and live in Fountain: Beat (free, open source) or Highland 2 (paid).

If you're a plain-text purist: Fountain in your favourite text editor.

For most writers in 2026, the practical answer is "a browser-based collaborative tool with a real free tier." That's the gap Ensemble was built to fill — and you can stress-test it in a tab right now.