# LanguageTool

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

**Replaces:** Grammarly

**Tier:** Easy

## 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.

## Stack

- [LanguageTool](https://languagetool.org) — Open-source style and grammar checker

## Estimated SaaS cost saved

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

**About $1,440 / year** on a small team, before you count lock-in.

## Deploy on Railway

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

[Start on Railway](https://c17.io/go/railway/languagetool-writing?from=%2Fstacks%2Flanguagetool-writing.md)

## AGENT_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.
```

## 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.

Source: https://c17.io/stacks/languagetool-writing