Alternative toGrammarly
LanguageTool
Open-source grammar, spelling, and style checker for 25+ languages; can be run locally or self-hosted. Premium cloud features are a separate product.
Setup: self-host
Free alternatives to Grammarly
Compare proofreading tools by grammar and style coverage, language support, and where they work. Some focus on correction or prose rules rather than a full writing assistant.
Available alternatives
Alternative toGrammarly
Harper
Offline, open-source English grammar and style checker with editor integrations. It focuses on proofreading, not Grammarly's full generative-writing suite.
Setup: self-host
Alternative toGrammarly
Vale
Open-source prose linter for spelling, style, and terminology with configurable rules. It is a writing-quality checker, not a generative assistant.
Setup: terminal
Compare the options
Showing 3 of 3 published options on this page. Access and setup details come from each project's configured source.
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| Option | What it can help with | Free access | What you need | Important limitation | Last checked |
|---|---|---|---|---|---|
| LanguageTool Source | Open-source grammar, spelling, and style checker for 25+ languages; can be run locally or self-hosted. | Check current terms in the source Use a local model; device resources are required | self-host | Check the source for current capabilities | |
| Harper |
Choose by your workflow
Free Grammarly alternatives differ in proofreading scope, language coverage, and editor or offline workflows. Compare the source-backed features before treating a grammar checker as a full writing-assistant replacement.
A grammar checker or prose linter can be useful without matching Grammarly's broader writing and generative features.
Check grammar and style
This scenario uses only source descriptions that explicitly identify a grammar, spelling, or style checker.
- Harper
Offline, open-source English grammar and style checker with editor integrations.
It focuses on proofreading, not Grammarly's full generative-writing suite.
Source - LanguageTool
Open-source grammar, spelling, and style checker for 25+ languages; can be run locally or self-hosted.
- Harper