Writing and content

Hemingway Editor Plus alternatives

2 open-source projects that already do this job. Free to use - not free to run, which is what the numbers on the right are for.

The full assessment →

The projects

languagetool-org/languagetool14,771LGPL-2.1Rule-based style and grammar checker supporting 25+ languages and extensible custom rules.Open on GitHub Automattic/harper14,225Apache-2.0Offline, privacy-first Rust grammar checker for fast local proofreading and suggestions.Open on GitHub

What you give up either way

Hemingway brand and user base
Hemingway’s proprietary UX polish and any closed-source heuristics
Hosted account sync, multi-device cloud storage, and paid subscription features
Any proprietary AI models or datasets used by the vendor

An open-source project doing the core job proves a replacement is possible. It does not prove it matches Hemingway Editor Plus, and it does not prove anyone has run it for a month. How we decide.