Celtx alternatives · Writing
Open-source alternatives to Celtx
Celtx is not described as open source on its own site. 19 of the 100 other writing tools in this directory are open source, according to their own sites.
Celtx has a free plan. Paid plans start at $11.24 per month, billed yearly ($134.88); $14.99 billed monthly (Writer). 18 of them are free or have a free plan.
19 tools · Listings checked up to Nov 12, 2026 · Where the facts come from
The 12 closest to Celtx
- Free plan · from $7.99/mo
Typst
Markup-based typesetting system with a collaborative web app
- Typst starts at $7.99 per month, billed monthly ($79.99 billed yearly). Celtx starts at $11.24 per month, billed yearly ($134.88); $14.99 billed monthly (Writer).
- Only Typst lists macOS and Linux apps.
- Only Celtx lists an Android app.
- Typst is open source and self-hostable, according to its own site.
- Free trial · from $12/mo
Pressbooks
Book publishing platform that exports EPUB, PDF and web books
- Pressbooks starts at $12 per book / month ($120 billed yearly). Celtx starts at $11.24 per month, billed yearly ($134.88); $14.99 billed monthly (Writer).
- Celtx has a free plan. Pressbooks does not, though it has a free trial.
- Only Celtx lists Android and Windows apps.
- Pressbooks is open source and self-hostable, according to its own site.
- Free
LibreOffice Writer
Free, open-source word processor for Windows, macOS and Linux
- LibreOffice Writer is free. Celtx starts at $11.24 per month, billed yearly ($134.88); $14.99 billed monthly (Writer).
- Only LibreOffice Writer lists macOS and Linux apps.
- Only Celtx lists a web app.
- Only Celtx lists an Android app.
- Free
Zettlr
Free, open-source Markdown editor for academic writing
- Zettlr is free. Celtx starts at $11.24 per month, billed yearly ($134.88); $14.99 billed monthly (Writer).
- Only Zettlr lists macOS and Linux apps.
- Only Celtx lists a web app.
- Only Celtx lists an Android app.
- Free
Manuskript
Free, open-source novel planner with an outliner and index cards
- Manuskript is free. Celtx starts at $11.24 per month, billed yearly ($134.88); $14.99 billed monthly (Writer).
- Only Manuskript lists Linux and macOS apps.
- Only Celtx lists a web app.
- Only Celtx lists an Android app.
- Free
novelWriter
Free, open-source plain-text editor for writing novels
- novelWriter is free. Celtx starts at $11.24 per month, billed yearly ($134.88); $14.99 billed monthly (Writer).
- Only novelWriter lists a Linux app.
- Only Celtx lists a web app.
- Only Celtx lists an Android app.
- Free plan · from $3.49/mo
bibisco
Novel planning and writing software built around characters
- bibisco starts at $3.49 per month for Everywhere sync; desktop Supporters Edition is $69 one-time. Celtx starts at $11.24 per month, billed yearly ($134.88); $14.99 billed monthly (Writer).
- Only bibisco lists macOS, Linux and iOS apps.
- Only Celtx lists a web app.
- bibisco is open source, according to its own site.
- Free
Trelby
Free, open-source screenwriting program for desktop
- Trelby is free. Celtx starts at $11.24 per month, billed yearly ($134.88); $14.99 billed monthly (Writer).
- Only Trelby lists macOS and Linux apps.
- Only Celtx lists a web app.
- Only Celtx lists an Android app.
- Free plan · from $11.99 one-time
Beat
Free, open-source Fountain screenwriting app for Mac and iOS
- Beat starts at $11.99 one-time for the iOS app. Celtx starts at $11.24 per month, billed yearly ($134.88); $14.99 billed monthly (Writer).
- Only Beat lists macOS and iOS apps.
- Only Celtx lists a web app.
- Only Celtx lists Android and Windows apps.
- Free
TeXstudio
Open-source LaTeX editor with an integrated PDF viewer
- TeXstudio is free. Celtx starts at $11.24 per month, billed yearly ($134.88); $14.99 billed monthly (Writer).
- Only TeXstudio lists macOS and Linux apps.
- Only Celtx lists a web app.
- Only Celtx lists an Android app.
- Free plan · from $4.99/mo
LanguageTool
Grammar and style checker for more than 30 languages
- LanguageTool starts at $4.99 per month on a 2-year plan ($119.80); $69.90 billed annually. Celtx starts at $11.24 per month, billed yearly ($134.88); $14.99 billed monthly (Writer).
- Only LanguageTool lists macOS and iOS apps.
- Only LanguageTool lists a browser extension.
- Only Celtx lists an Android app.
- Free
FocusWriter
Free distraction-free word processor for Windows and Linux
- FocusWriter is free. Celtx starts at $11.24 per month, billed yearly ($134.88); $14.99 billed monthly (Writer).
- Only FocusWriter lists a Linux app.
- Only Celtx lists a web app.
- Only Celtx lists an Android app.
Common questions
Is there an open-source alternative to Celtx?
Yes. Typst, Pressbooks, LibreOffice Writer, Zettlr, Manuskript, novelWriter, bibisco, Trelby and 11 more are open source, according to their own sites.
Is Celtx open source?
Celtx is not described as open source on its own site. The listing was checked on Oct 6, 2026 against the pages it cites.
Which of these writing tools are free?
Typst, LibreOffice Writer, Zettlr, Manuskript, novelWriter, bibisco, Trelby, Beat and 10 more are free or have a free plan.
When was this checked?
Each listing shows its own date. On this page they run from Oct 5, 2026 to Nov 12, 2026. Vendors change prices and plans without notice, so confirm on their site before you buy.
This page is built from the listings. A tool is here because its listing says so, and the order is how close each is to Celtx: the alternatives its listing names first, then the tools that share the most features with it.