What does Harper replace?

Harper is a free alternative to Grammarly ($144/yr).

Is Harper open source?

Yes. Harper is licensed under Apache-2.0, an OSI-approved open-source license.

Yes (Arch extra: harper). Install with: sudo pacman -S harper.

There's nothing to host: Harper is a desktop app that runs on your own machine.

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

Checked Oct 17, 2026 · How we check

Desktop app

Open source · Apache-2.0 Linux Arch/AUR

Automattic/harper16.3k★last push Oct 10, 2026checked Oct 17, 2026

Install

$ sudo pacman -S harper

What does Harper replace?: Harper is a free alternative to Grammarly ($144/yr).
Is Harper open source?: Yes. Harper is licensed under Apache-2.0, an OSI-approved open-source license.
Does Harper run on Linux?: Yes (Arch extra: harper). Install with: sudo pacman -S harper.
Can you self-host Harper?: There's nothing to host: Harper is a desktop app that runs on your own machine.