What does LanguageTool (self-hosted server) replace?

LanguageTool (self-hosted server) is a free alternative to Grammarly ($144/yr).

Is LanguageTool (self-hosted server) open source?

Yes. LanguageTool (self-hosted server) is licensed under LGPL-2.1, an OSI-approved open-source license.

Yes (self-hosted server; web UI).

Yes. LanguageTool (self-hosted server) is a server app you run on your own server.

A free, open-source alternative to Grammarly. Switching saves $144/yr at list price.

Checked Oct 17, 2026 · How we check

Self-hosted server

Open source · LGPL-2.1 Linux Self-hostable

languagetool-org/languagetool15.2k★last push Oct 17, 2026checked Oct 17, 2026

Self-host

Runs on your own Linux server. Setup docs are on languagetool.org.

What does LanguageTool (self-hosted server) replace?: LanguageTool (self-hosted server) is a free alternative to Grammarly ($144/yr).
Is LanguageTool (self-hosted server) open source?: Yes. LanguageTool (self-hosted server) is licensed under LGPL-2.1, an OSI-approved open-source license.
Does LanguageTool (self-hosted server) run on Linux?: Yes (self-hosted server; web UI).
Can you self-host LanguageTool (self-hosted server)?: Yes. LanguageTool (self-hosted server) is a server app you run on your own server.