Harper — #2 Alternative to Grammarly
Sub-millisecond offline Rust grammar and typo checker built for privacy-conscious developers
Executes 100% locally in WebAssembly or native Rust (`harper-ls`) using <25 MB RAM—never making a single network request across Chrome, Obsidian, Neovim, or VS Code.
License: Apache-2.0 · Pricing: Free & Open Source · Compare all Grammarly alternatives · Official Website