2 Best Open Source Grammarly Alternatives
A curated collection of the 2 best open source and self-hosted alternatives to Grammarly in 2026.
Looking for a free, privacy-friendly, or self-hosted replacement for Grammarly in 2026? The top open-source alternative is Harper — Open source grammar checker that analyzes your writing quickly while keeping your data completely private and secure on your device..
Other highly rated open-source Grammarly alternatives include LanguageTool.
Open source grammar checker that analyzes your writing quickly while keeping your data completely private and secure on your device.
Open source grammar checker that analyzes your writing quickly while keeping your data completely private and secure on your device.
Check grammar, punctuation, and spelling errors instantly with AI-powered technology. Supports 30+ languages with browser extensions and desktop apps.
Check grammar, punctuation, and spelling errors instantly with AI-powered technology. Supports 30+ languages with browser extensions and desktop apps.
About Grammarly
AI-powered writing assistant that checks grammar, spelling, punctuation, and style to help you write clear, mistake-free content across all platforms.