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Open Source Grammarly Alternatives

The best open source alternative to Grammarly is LanguageTool. If that doesn't suit you, our users have ranked more than 50 alternatives to Grammarly and 11 is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Grammarly are Grammalecte, Editsaurus, proselint and write-good.

Grammarly alternatives are mainly Grammar Checkers but may also be Translators or SEO Tools. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of Grammarly.
This page was last updated May 20, 2022
Grammarly
  205
  • FreemiumProprietary
  • Mac
  • Windows
  • Online
  • Google Chrome
  • Microsoft Office Outlook
  • Safari
  • Microsoft Office Word
  • Software as a Service (SaaS)
  • Firefox

Grammarly Editor is an automated proofreader that corrects contextual spelling mistakes, checks for more than 250 common...

Learn more about Grammarly

  1. LanguageTool

    • FreemiumOpen Source
    • Mac
    • Windows
    • Linux
    • Online
    • Android
    • Microsoft Edge
    • Google Chrome
    • Microsoft Office Outlook
    • SDL TRADOS
    • Safari
    • Visual Studio Code
    • Microsoft Office Word
    • Eclipse
    • TinyMCE
    • TeXstudio
    • Google Drive - Docs
    • Thunderbird
    • Vim
    • OmegaT
    • Sublime Text
    • GNU Emacs
    • Opera
    • Fidus Writer
    • LyX
    • LibreOffice
    • <oXygen/> XML Editor
    • Apache OpenOffice
    • Firefox

    Free proofreading tool for LibreOffice, Apache OpenOffice, Microsoft Word, Ulysses, .

    LanguageTool vs Grammarly opinions
    Some users think LanguageTool is a great alternative to Grammarly, some don't.
     all • positive • negative      relevance • date
    tapasratha

    Most of the time it helps in getting correct sentence.

    Top positive comment  8 months ago
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    1
    cherriesravenclaw

    Open source. Works just as good, if not better than Grammarly, and it's cheaper if you do opt for one of the paid plans.

    Top positive comment  9 months ago
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    1

    It does not correct the style of writing to a better way, it just corrects spelling and grammar.

    Top negative comment  over 4 years ago
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    11
    RemovedUser

    Open source, cheaper, works in more languages.

    Positive comment about 2 years ago
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    5

    It doesn't work very well. For example, it shows all is good if I type in the following: "Can you do plan by yourself? Yoda I speak like and check grammar I do. "

    Negative comment about 2 years ago
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    12

    It supports more than just English and is privacy-minded

    Positive comment about 3 years ago
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    4
    Mansampard01

    Since end of 2018 it has an browser extension that is on par with grammarly. It supports much more languages than grammarly.

    Positive comment over 3 years ago
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    2
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    7 of 10 comments
  2. Grammalecte

    • FreeOpen Source
    • Mac
    • Windows
    • Linux
    • Chrome OS
    • Google Chrome
    • Python
    • Thunderbird
    • Vim
    • Sublime Text
    • GNU Emacs
    • Pluma
    • LibreOffice
    • Firefox
    • LibreOffice - Writer

    Grammalecte is a French grammar checker.

    Almost everyone thinks Grammalecte is a great alternative to Grammarly.


  3. Highlights potential pitfalls in your writing to encourage good habits.

  4. proselint

    • FreeOpen Source
    • Linux

    "Writing is notoriously hard, even for the best writers, and it's not for lack of good advice — a tremendous amount of knowledge about the craft is strewn across usage guides, dictionaries, technical manuals, essays, pamphlets, websites, and the hearts and minds of...

    No screenshots yet
  5. write-good

    • FreeOpen Source
    • Mac
    • Windows
    • Linux
    • Atom

    Naive linter for English prose for developers who can't write good and wanna learn to do other stuff good too.

    No screenshots yet


  6. Grammark

    • FreeOpen Source
    • Online
    • Self-Hosted

    Grammark helps improve writing style & grammar and teaches students to self-edit. Basically, it finds things that grammarians consider bad, highlights them, and suggests improvements.

    No screenshots yet
    Grammark vs Grammarly opinions
    pros, cons and recent comments

    Grammark has a "lean in" style with active voice that I like. It's a nuance but important.

    Positive comment over 2 years ago
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    0
    pmilsom

    Grammark is very proficient Authors protector. It has to be used as a service and can't be downloaded into Libre Office. But it does a wonderful job in the smaller offerings that can be managed through a service.

    Positive comment over 2 years ago
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    0
  7. Expresso app

    • FreeOpen Source
    • Online

    Expresso is a little tool to edit texts and improve your writing style. It will teach you to express yourself through writing more efficiently and help make your texts more readable, precise, and engaging.

  8. Just Not Sorry -- the Gmail Plug-in

    • FreeOpen Source
    • Mac
    • Windows
    • Linux
    • Chrome OS
    • Google Chrome

    just-not-sorry - Gmail Plug-in that warns you when you write emails using words which undermine your message

  9. Perfect Tense

    • FreemiumOpen Source
    • Mac
    • Windows
    • Linux
    • Online
    • Chrome OS
    • Zapier
    • Slack
    • Wordpress

    AI-powered grammar correction tool that understands the context and meaning of the text to accurately identify and fix errors. With a powerful API, Perfect Tense lets you easily add grammar correction to your product or workflow.

    No screenshots yet
    Perfect Tense vs Grammarly opinions
    pros, cons and recent comments
    alexcardinell

    It has similar functionality but also has an API so websites can easily add spelling and grammar correction as well.

    Positive comment almost 4 years ago
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    0
  10. Typopo

    • FreeOpen Source
    • Online
    • Software as a Service (SaaS)

    Typopo fixes microtypography errors that often require attentive eye and knowledge of local typography rules. It works for English, German, Slovak, Czech and Rusyn texts.

Showing 10 of 11 alternatives