Last updated: 2026-05-23
AI writing assistant browser extension used by 600,000+ users for emails, grammar fixes, summarization, and tone changes across Gmail, LinkedIn, and any we
JetWriter AI, formerly known as ChatGPT Writer, is a browser-based AI writing assistant launched in December 2022. It rebranded to JetWriter AI in September 2025 to reflect its expansion beyond GPT-only integration to include Claude, Gemini, and other models. As of 2025, the tool is trusted by over 600,000 users across its Chrome extension, web app, and mobile app. The core product is a lightweight Chrome extension (under 1MB) that integrates AI writing assistance directly into Gmail, LinkedIn, Outlook, and virtually any text field on the web. When triggered in Gmail or another messaging platform, it reads the conversation context automatically and suggests replies without requiring copy-pasting. Users can also fix grammar, change tone, summarize text, translate content, and ask AI questions about the current webpage. JetWriter AI differentiates itself through personalization: users build custom writing style profiles that shape outputs to match their voice, making generated replies less generic than those from a standard ChatGPT session. The tool also supports voice-to-prompt input in any language and allows users to supply their own API key as an alternative to the built-in credit system. Pricing is three-tier: Free (15 responses/month), Pro at $12/month ($9 billed annually) for unlimited responses, and Elite at $18/month ($14 billed annually) for the best-quality models and advanced reasoning tasks. The free plan is sufficient for testing but not daily professional use. JetWriter AI explicitly states in its privacy policy that user data is not used to train AI models and is not sold to third parties, which addresses a common concern with browser extension AI tools. The tool is best for professionals who write frequently in email and messaging contexts rather than long-form content creators — it produces 200-500 word outputs well but struggles with 2,000+ word articles.
Free: 15 AI responses/month. Pro: $12/month ($9/month billed annually) — unlimited responses, priority support. Elite: $18/month ($14/month billed annually) — unlimited responses, best-quality models, advanced reasoning. Users can also supply their own OpenAI/Anthropic/Google API key instead of using a plan.
| Feature | Pro | Free | Elite |
|---|---|---|---|
| Monthly AI responses | ~500/mo (unlimited regular) | 15/mo (regular) | ~1,000/mo (unlimited regular) |
| Advanced AI models (Opus, GPT-5.5, Sonnet 4.6) | ✓ | — | ✓ |
| Advanced model responses/month | ~500/mo | — | ~1,000/mo |
| Browser extensions | Chrome, Edge, Brave, Opera, Vivaldi | Chrome only | Chrome, Edge, Brave, Opera, Vivaldi |
| Web app + mobile apps | ✓ | ✓ | ✓ |
| Live web search access | ✓ | ✓ | ✓ |
| Voice input + file attachments | ✓ | ✓ | ✓ |