compare
Harper vs LanguageTool
The same facts for both, read from GitHub every night, and the relation a person reviewed.
| Fact | Harper | LanguageTool |
|---|---|---|
| Language | Rust | Java |
| Licence | Apache-2.0 | LGPL-2.1 |
| Stars | 16k | 15k |
| Latest | v2.12.0 | v6.8 |
| Last push | 2026-10-06 | 2026-10-06 |
| Release cadence | about 12 days between releases | too few releases |
| Active contributors | 28 commit authors on the default branch in the last 90 days | 16 commit authors on the default branch in the last 90 days |
| Flags | none | none |
How they relate
Both replace Grammarly. Alternatives to Grammarly →
PartialHarperEnglish grammar checking offline, in the editor and the browser.
Full replacementLanguageToolGrammar, style and spelling checks in over 30 languages, with a server you can run yourself.
Harper
- v2.12.02026-10-01feat: flag redundant "almost" + "nearly"
- v2.11.02026-09-16fix(web): color of the logo used in loading animation
- v2.10.02026-09-09feat: a jar & a kimbo → ajar & akimbo
- v2.9.12026-09-01chore: more irregular plurals
- v2.8.02026-08-13feat(core): create pool of instantiated linters to amortize construction cost
LanguageTool
This repository publishes tags, not GitHub releases.
Harper
unsigned The latest release, v2.12.0, carries no signature GitHub could verify.
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LanguageTool
unsigned The latest release, v6.8, carries no signature GitHub could verify.
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