Will this rewrite my tone like Grammarly Pro?

It checks grammar and style. Generative rewrite is a different product. Start with checking; add a local LLM later if you actually need rewrites.

Stacks / Docs

Easy

LanguageTool

Grammar and style you host. LanguageTool is the LGPL checker for 25+ languages — Grammarly without the Pro seat.

The problem

Grammarly Pro is a writing meter in the browser. LanguageTool is the open-source engine you can run yourself (HTTP API + n-gram data optional). Browser add-ons still talk to your instance.

Replaces

Grammarly

Replace Grammarly

Estimated SaaS saved

$1,440

per year, small team, before lock-in

Start on Railway

Sponsor this stack Tip jar

Placeholder: LanguageTool HTTP server. Optional n-gram volume for better suggestions. Point the browser add-on at your API URL.

The stack

LanguageTool
Open-source style and grammar checker

Cost table

You stop paying	Typical / year	Self-host instead
Grammarly Pro (10 seats)	$1,440	LanguageTool on Railway

Agent setup prompt

Replace Grammarly with self-hosted LanguageTool.

- Run the LanguageTool HTTP API. Persist n-gram data on a volume if you enable it.
- Point the official browser add-on at your instance. Confirm one document gets suggestions.
- Write AGENT_PROMPT.md. Do not claim generative rewrite features LanguageTool does not ship.

Also as markdown: /stacks/languagetool-writing.md

FAQ

Will this rewrite my tone like Grammarly Pro?: It checks grammar and style. Generative rewrite is a different product. Start with checking; add a local LLM later if you actually need rewrites.