Harper
Pricing, features & alternatives
Open-source grammar checking that never leaves your computer
- Launched
- November 11, 2026
- Updated
- November 11, 2026
- Pricing
- Free
- Listing
- Free listing
overview
What is Harper?
Harper is listed under Writing on Launch Your SaaS. Open-source grammar checking that never leaves your computer.
Harper is a free, open-source grammar and spell checker that works locally without AI or cloud processing. It integrates with editors and browsers.
audience
Who is Harper for?
Harper is built for teams looking for writing tools. Open-source grammar checking that never leaves your computer.
Good fit if
- You're comparing writing tools.
- You'd like to start free and upgrade later.
Good to know
- Listed on Launch Your SaaS since November 11, 2026
- Built and run by the Harper team, not Launch Your SaaS
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pricing
How is Harper priced?
Harper is listed as free. You can use it without paying.
alternatives
How does Harper compare to alternatives?
Harper is listed as Free. In Writing, the closest listings are Resumr, Paraphraser.io, NotebookLama. Resumr is listed as Free. Paraphraser.io is listed as Free. NotebookLama is listed as Free. See the alternatives page for the full list.
faq
Harper FAQ
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