Best Open-Source Writing & Grammar Assistants | open-source.storeAll categoriesWriting & Grammar Assistants
Grammar checking, style correction, and editor helpers
7 tools found 
LanguageTool
Open-source grammar and style checker for 30+ languages, offering free proofreading and local hosting as an alternative to Grammarly.
15.2kLinuxmacOSWindows1d ago LGPL-2.1Writing & Grammar Assistants
Vale
Vale is an open-source prose linter that replaces cloud grammar checkers with fast, local style guide enforcement in documentation pipelines.
6.3kLinuxmacOSWindows3d ago MITWriting & Grammar Assistants
write-good
write-good is an open-source prose linter that replaces paid writing assistants with free, offline command-line checks for passive voice and wordiness.
5.1kLinuxmacOSWindows2y ago MITWriting & Grammar Assistants
alex
alex is an open-source CLI and Node.js linter that catches insensitive and exclusionary phrasing in Markdown and HTML docs within CI/CD pipelines.
5.1kLinuxmacOSWindows2y ago MITWriting & Grammar Assistants
proselint
proselint is an open-source command-line prose linter that replaces Hemingway Editor with fast, offline style checks in Git hooks and CI pipelines.
4.6kLinuxmacOSWindows2mo ago BSD-3-ClauseWriting & Grammar Assistants
textlint
textlint replaces paid writing assistants with a pluggable prose linter that automates style guides and checks docs directly in CLI and CI pipelines.
3.2kLinuxmacOSWindows4d ago MITWriting & Grammar Assistants
Promoted
Free IDE for Java, Kotlin, Go, TypeScript and Python. Built on IntelliJ Community, fully open source, 300+ plugins.
Manuskript
Manuskript is an open-source desktop writing assistant that replaces Scrivener with free outlining, index cards, character notes, and plain-text storage.
GPL-3.0Writing & Grammar Assistants
Windows
3d ago
MITWriting & Grammar Assistants
GPL-3.0Writing & Grammar Assistants
Windows
2y ago
MITWriting & Grammar Assistants