Open source · LGPL-2.1 Linux Self-hostable
Self-host
Runs on your own Linux server. Setup docs are on languagetool.org.
Free alternatives to Grammarly
Swap Grammarly for LanguageTool (self-hosted server) or Harper and stop paying $144/yr.
2open source2run on Linux1in Arch/AUR1self-hostable
Prices and project data checked · How we check
$144/yr Pro Verified on grammarly.com, Oct 17, 2026
2 alternatives
Open source · Apache-2.0 Linux Arch/AUR
Install
$ sudo pacman -S harperAt a glance
| Alternative | License | Linux | AUR | Self-host | Stars |
|---|---|---|---|---|---|
| LanguageTool (self-hosted server) | LGPL-2.1 open source | Yes | — | Yes | 15.2k★ |
| Harper | Apache-2.0 open source | Yes | Yes | No | 16.3k★ |
Grammarly alternatives: questions
- Is there a free alternative to Grammarly?
- Yes. The 2 free alternatives are LanguageTool (self-hosted server) (open source, LGPL-2.1) and Harper (open source, Apache-2.0).
- How much does Grammarly cost?
- Grammarly's Pro plan costs $12 a month, which is $144 a year (per month). Source: the official pricing page at grammarly.com, checked Oct 17, 2026.
- Which Grammarly alternatives run on Linux?
- LanguageTool (self-hosted server) (self-hosted server; web UI) and Harper (Arch extra: harper).
- Can you self-host a Grammarly alternative?
- Yes. LanguageTool (self-hosted server) runs on your own server. Harper is a desktop app.
- Are these Grammarly alternatives open source?
- Yes. All 2 use OSI-approved open-source licenses: LanguageTool (self-hosted server) (LGPL-2.1) and Harper (Apache-2.0).
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