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WriterDuet alternatives · Writing

Open-source alternatives to WriterDuet

WriterDuet is not described as open source on its own site. 12 of the 67 other writing tools in this directory are open source, according to their own sites.

WriterDuet has a free plan. Paid plans start at $7.49 per month, billed annually ($89.88); $9.99 billed monthly (Plus). All of them are free or have a free plan.

12 tools · Listings checked up to Oct 9, 2026 · Where the facts come from

How each one differs from WriterDuet

  1. Trelby

    Free, open-source screenwriting program for desktop

    • Trelby is free. WriterDuet starts at $7.49 per month, billed annually ($89.88); $9.99 billed monthly (Plus).
    • Only WriterDuet lists a web app.
    • Only WriterDuet lists iOS and Android apps.
    • Trelby is open source, according to its own site.
    Trelby vs WriterDuetTrelby pricing and details

  2. Typst

    Markup-based typesetting system with a collaborative web app

    • Typst starts at $7.99 per month, billed monthly ($79.99 billed yearly). WriterDuet starts at $7.49 per month, billed annually ($89.88); $9.99 billed monthly (Plus).
    • Only WriterDuet lists iOS and Android apps.
    • Typst is open source and self-hostable, according to its own site.
    • Typst also covers citations and presentations.
    Typst pricing and details

  3. LibreOffice Writer

    Free, open-source word processor for Windows, macOS and Linux

    • LibreOffice Writer is free. WriterDuet starts at $7.49 per month, billed annually ($89.88); $9.99 billed monthly (Plus).
    • Only WriterDuet lists a web app.
    • Only WriterDuet lists iOS and Android apps.
    • LibreOffice Writer is open source, according to its own site.
    LibreOffice Writer pricing and details

  4. Zettlr

    Free, open-source Markdown editor for academic writing

    • Zettlr is free. WriterDuet starts at $7.49 per month, billed annually ($89.88); $9.99 billed monthly (Plus).
    • Only WriterDuet lists a web app.
    • Only WriterDuet lists iOS and Android apps.
    • Zettlr is open source, according to its own site.
    Zettlr pricing and details

  5. Manuskript

    Free, open-source novel planner with an outliner and index cards

    • Manuskript is free. WriterDuet starts at $7.49 per month, billed annually ($89.88); $9.99 billed monthly (Plus).
    • Only WriterDuet lists a web app.
    • Only WriterDuet lists iOS and Android apps.
    • Manuskript is open source, according to its own site.
    Manuskript pricing and details

  6. novelWriter

    Free, open-source plain-text editor for writing novels

    • novelWriter is free. WriterDuet starts at $7.49 per month, billed annually ($89.88); $9.99 billed monthly (Plus).
    • Only WriterDuet lists a web app.
    • Only WriterDuet lists iOS and Android apps.
    • novelWriter is open source, according to its own site.
    novelWriter pricing and details

  7. 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. WriterDuet starts at $7.49 per month, billed annually ($89.88); $9.99 billed monthly (Plus).
    • Only WriterDuet lists a web app.
    • bibisco is open source, according to its own site.
    • bibisco can be bought with a one-time purchase.
    bibisco pricing and details

  8. Beat

    Free, open-source Fountain screenwriting app for Mac and iOS

    • Beat starts at $11.99 one-time for the iOS app. WriterDuet starts at $7.49 per month, billed annually ($89.88); $9.99 billed monthly (Plus).
    • Only WriterDuet lists a web app.
    • Only WriterDuet lists Windows, Linux and Android apps.
    • Beat is open source, according to its own site.
    Beat pricing and details

  9. 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. WriterDuet starts at $7.49 per month, billed annually ($89.88); $9.99 billed monthly (Plus).
    • Only LanguageTool lists a browser extension.
    • Only WriterDuet lists Linux and Android apps.
    • LanguageTool is open source and self-hostable, according to its own site.
    LanguageTool pricing and details

  10. FocusWriter

    Free distraction-free word processor for Windows and Linux

    • FocusWriter is free. WriterDuet starts at $7.49 per month, billed annually ($89.88); $9.99 billed monthly (Plus).
    • Only WriterDuet lists a web app.
    • Only WriterDuet lists macOS, iOS and Android apps.
    • FocusWriter is open source, according to its own site.
    FocusWriter pricing and details

  11. ghostwriter

    Free, open-source Markdown editor from KDE for focused writing

    • ghostwriter is free. WriterDuet starts at $7.49 per month, billed annually ($89.88); $9.99 billed monthly (Plus).
    • Only WriterDuet lists a web app.
    • Only WriterDuet lists macOS, iOS and Android apps.
    • ghostwriter is open source, according to its own site.
    ghostwriter pricing and details

  12. MarkText

    Free, open-source Markdown editor with in-place live rendering

    • MarkText is free. WriterDuet starts at $7.49 per month, billed annually ($89.88); $9.99 billed monthly (Plus).
    • Only WriterDuet lists a web app.
    • Only WriterDuet lists iOS and Android apps.
    • MarkText is open source, according to its own site.
    MarkText pricing and details

Common questions

Is there an open-source alternative to WriterDuet?

Yes. Trelby, Typst, LibreOffice Writer, Zettlr, Manuskript, novelWriter, bibisco, Beat and 4 more are open source, according to their own sites.

Is WriterDuet open source?

WriterDuet is not described as open source on its own site. The listing was checked on Oct 6, 2026 against the pages it cites.

When was this checked?

Each listing shows its own date. On this page they run from Oct 5, 2026 to Oct 9, 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 WriterDuet: the alternatives its listing names first, then the tools that share the most features with it.