Grammarly AlternativesOnly Open Source apps categorised as Grammar Checkers

The best open source Grammar Checker alternative to Grammarly is LanguageTool. If that doesn't suit you, our users have ranked more than 100 alternatives to Grammarly and five of them are open source Grammar Checkers so hopefully you can find a suitable replacement. Other interesting open source Grammar Checker alternatives to Grammarly are Grammalecte, Editsaurus, Grammark and write-good.

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Grammarly alternatives are mainly Grammar Checkers but may also be AI Writing Tools or Plagiarism Checkers. Filter by these or use the filter bar below if you want a narrower list of alternatives or looking for a specific functionality of Grammarly.

Grammarly

233

Grammar Checker
Freemium • Proprietary

Grammarly Editor is an automated proofreader that corrects contextual spelling mistakes, checks for more than 250 common grammar errors, enhances vocabulary usage, and suggests citations.

More about Grammarly

Grammarly alternatives page was last updated Mar 29, 2024

LanguageTool
LanguageTool is a free proofreading software compatible with multiple applications like LibreOffice, Microsoft Word, Firefox, and Google Chrome. It supports around 20 languages and can be customized. It has two versions...
63 LanguageTool alternatives
License model
- Freemium • Open Source
Application type
- Grammar Checker
Platforms
- Mac
- Windows
- Linux
- Online
- iPhone
- iPad
- Microsoft Edge
- Google Chrome
- Microsoft Office Outlook
- Safari
- Visual Studio Code
- Microsoft Word
- Eclipse
- TinyMCE
- TeXstudio
- Google Docs
- Thunderbird
- Vim
- OmegaT
- Sublime Text
- GNU Emacs
- Opera
- Gmail
- Fidus Writer
- LyX
- LibreOffice
- Apache OpenOffice
- Mozilla Firefox
- LibreOffice - Writer
- ONLYOFFICE
+4
Top LanguageTool Features
1. Privacy focused
2. Multiple languages
3. Automated proofreading
4. Proofreading
5. Grammar tool
6. Custom dictionaries
7. Spell Checking
8. Dark Mode
9. Microsoft Edge extension
10. Ad-free
11. Neural network
12. N-grams
Show all NaN LanguageTool features ▾
LanguageTool VS Grammarly
Is LanguageTool a good alternative to Grammarly?
Comments about LanguageTool as an Alternative to Grammarly

RemovedUser
Open source, cheaper, works in more languages.
Top positive comment •May 24, 2020
5
Mansampard01
Since end of 2018 it has an browser extension that is on par with grammarly. It supports much more languages than grammarly.
Top positive comment •Jan 8, 2019
3
Guest
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. "
Top negative comment •Apr 21, 2020
13
AndrewIaz
It works anywhere, just fine
Positive comment •Jan 29, 2023
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.
Positive comment •Sep 27, 2021
0
Show more comments
5 of 10 comments
- Most users think LanguageTool is a great Grammarly alternative.
- LanguageTool is the most popular Web-based, Windows, Mac & iPhone alternative to Grammarly.
- LanguageTool is the most popular Open Source & free alternative to Grammarly.
- LanguageTool is Freemium and Open SourceGrammarly is Freemium and Proprietary
- LanguageTool is Privacy focusedGrammarly is not according to our users

Grammalecte
Grammalecte is a French grammar checker.
23 Grammalecte alternatives
License model
- Free • Open Source
Application type
- Grammar Checker
Platforms
- Mac
- Windows
- Linux
- Chrome OS
- Google Chrome
- Python
- Thunderbird
- Vim
- Sublime Text
- GNU Emacs
- Pluma
- LibreOffice
- Mozilla Firefox
- LibreOffice - Writer
- ONLYOFFICE
+2
Grammalecte Features
1. Spell Checking
2. Typography
3. French
4. Works Offline
5. Privacy focused
6. Ad-free
Show all NaN Grammalecte features ▾
Grammalecte VS Grammarly
Is Grammalecte a good alternative to Grammarly?

Editsaurus
Highlights potential pitfalls in your writing to encourage good habits.
52 Editsaurus alternatives
License model
- Free • Open Source
Application type
- Grammar Checker
Platforms
- Online
- Self-Hosted
Editsaurus Features
Spell Checking
Text Highlighting
Readability
Grammatical Error Checking
Show all NaN Editsaurus features ▾
Discontinued
The website is not available, and the last update is from August 2017.
Editsaurus VS Grammarly
Is Editsaurus a good alternative to Grammarly?
- Most users think Editsaurus is a great Grammarly alternative.
- Editsaurus is the most popular Self-Hosted alternative to Grammarly.
- Editsaurus is Free and Open SourceGrammarly is Freemium and Proprietary

Grammark
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.
19 Grammark alternatives
License model
- Free • Open Source
Application type
- Grammar Checker
Platforms
- Online
- Self-Hosted
Grammark Features
Works Offline
Grammatical Error Checking
Browser integration
Automated proofreading
Show all NaN Grammark features ▾
Grammark VS Grammarly
Is Grammark a good alternative to Grammarly?
Comments about Grammark as an Alternative to Grammarly

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 •Oct 31, 2019
0
Guest
Grammark has a "lean in" style with active voice that I like. It's a nuance but important.
Positive comment •Dec 8, 2019
0
- Grammark is Free and Open SourceGrammarly is Freemium and Proprietary

write-good
Naive linter for English prose for developers who can't write good and wanna learn to do other stuff good too.
19 write-good alternatives
License model
- Free • Open Source
Application type
- Grammar Checker
Platforms
- Mac
- Windows
- Linux
- Atom
write-good Features
Spell Checking
Works Offline
Show all NaN write-good features ▾
write-good VS Grammarly
Is write-good a good alternative to Grammarly?