Open source

LanguageTool

The grammar and style engine behind the browser add-on, running on your own machine, with nothing you write leaving it.

languagetool-org/languagetool · ★ 14,785 · last commit 0d ago · LGPL-2.1-or-later · needs 2048 MB RAM · runs on ARM (Pi-friendly)
LanguageTool running from the boot-verified compose file
LanguageTool, running from the compose file on this page — screenshot from our verified instance, not marketing material.

One tool, 1 subscription

The same server can serve several escape hatches — that's how a $5 VPS beats a $50 SaaS bill.

GrammarlyKINDA
$12/mo · breaks even in 0.5 mo