Riff: private AI chat in Chrome that writes in your voice

Chat with AI that runs on your computer, ask about any page, and turn answers into posts and replies in your voice. Nothing leaves your computer.

Riff is a free extension for Chrome, Brave and Edge. Chat in Riff Home, its own tab, and write replies and posts in a side panel on X, LinkedIn, Threads, Facebook, Instagram and YouTube, plus Slack and Teams on the web. Every model runs on your computer, and Riff never posts for you. No server, no API key, no monthly fee. Gemini Nano writes 5 languages and Gemma 4 writes 16.