🪶 OpenGrammar 2.0

Your privacy-first, open-source writing assistant.
The completely free, zero-compromise Grammarly alternative you can host yourself.

🌐 Official Website | 📖 Documentation Site

Writing clearly matters. But achieving perfect grammar shouldn't mean sacrificing your privacy or paying a premium monthly subscription to a tech giant.

OpenGrammar is a powerful intelligent writing assistant built to match the premium writing tools you already know, but with one massive difference: You own your data, and it runs completely for free.

🌟 Why OpenGrammar?

1. The Zero-Cost Foundation: Out of the box, our core engine runs 100% locally in your browser. With a massive 156,000-word offline dictionary, it instantly catches misspellings, passive voice, and weak phrasing without ever pinging a server.
2. Bring Your Own Brain (BYOK): Want deep, context-aware AI corrections? Just plug in your own API key (OpenAI, Groq, Together, OpenRouter, or local models via Ollama). You pay fractions of a cent exclusively for what you use.
3. Paranoid-Level Privacy: We don't have a database. We don't want your data. Your API key never leaves your browser storage. Text processed through the AI is immediately deleted via stateless edge functions.
4. Deploy It Yourself: You own the entire pipeline. Host our lightweight backend instantly via Docker, NPM, Cloudflare, Vercel, or Netlify.