Best Grammarly Alternatives
Cloud keystroke-streaming writing assistant. Security teams frequently block Grammarly browser extensions to prevent confidential source code, legal drafts, and customer emails from streaming to third-party servers.
Productivity · Markdown Spec
- LanguageTool — Open-source self-hostable multilingual grammar, punctuation, and style server for 30+ languages (Score: 92.7, Open Core, LGPL-2.1+)
- Harper — Sub-millisecond offline Rust grammar and typo checker built for privacy-conscious developers (Score: 82.3, Free & Open Source, Apache-2.0)
- Vale — Fast, syntax-aware CLI prose linter enforcing Google, Microsoft, or custom brand style guides (Score: 70.9, Free & Open Source, MIT)
- ProWritingAid — In-depth pacing, readability, cliché, and sentence-variety studio with lifetime license option (Score: 49.2, Commercial, Proprietary (Lifetime Option))
- proselint — Opinionated BSD-licensed literary linter codifying advice from Strunk & White, Orwell, and Garner (Score: 46.8, Free & Open Source, BSD-3-Clause)