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Office · free alternative

Harper

Offline grammar and spell checker built for fast editor integration.

Licence
Apache-2.0
Platforms
macos, windows, linux
Self-hostable
No
Pricing model
free
Language
Rust
Repo activity
Last release October 16, 2026
GitHub stars
17,145
Last verified
October 24, 2026

Replaces

The paid products this tool can replace, at their public list price.