Riff
Fresh replies for every post, written on your computer
Riff is a free Chrome extension that helps you reply on X, LinkedIn, Facebook and Instagram. You paste your rough point. Gemini Nano, the AI built into Chrome, writes a fresh reply for that exact post. You read it, edit it if you want, and press send yourself.
Riff also answers your DMs in LinkedIn Messaging, Messenger on facebook.com and Instagram Direct. When a chat is new, it writes the first message. It can draft your own posts too. Drop in rough notes, ask for changes in plain words, and pick a hook you like.
Everything runs on your computer. There is no account, no API key, no server and no monthly bill. Your notes, drafts and history stay in Chrome on your machine. Riff never posts or sends anything for you.
Riff needs desktop Chrome 138 or newer, about 22 GB of free disk for the one-time model download, and a GPU with more than 4 GB of video memory, or 16 GB of RAM and 4 CPU cores.
Key Features & Capabilities
Core highlights, automation workflows, and capabilities offered by this tool
Context
aware replies and DMs: Riff can read the current social post, reply thread, or chat context to draft a relevant response; in direct messages, it can generate an answer from the incoming message even when no extra prompt is provided.
Cross
platform Chrome workflow: The extension works in the posting and messaging interfaces of X, LinkedIn, Facebook, and Instagram, with a side panel that follows the active post box, comment field, or conversation.
Draft controls and rapid rewrites
Users can set how intelligent, sales-oriented, or adventurous the writing should be, then revise output with options such as Shorter, Punchier, More human, Softer pitch, Bolder, or + Question.
Post and outreach creation
Beyond comments, Riff can turn rough notes into LinkedIn posts, X threads, Facebook posts, and first messages, then lets users request changes conversationally before inserting the final draft.
Founders, B2B sales professionals, growth marketers, social media managers, consultants, creators, and small teams active on LinkedIn, X, Facebook, and Instagram
How It Works (Step-by-Step)
The end-to-end user journey from input to automated output
Step 1
Open Riff in Chrome’s side panel from the toolbar or with Alt+Shift+R, then select a social post, comment field, DM, or new-post box.
Step 2
Enter a rough point or notes (or leave it blank in a DM for Riff to answer the received message). Choose settings such as intelligence, sales tone, and adventurousness, then generate.
Step 3
Riff uses Gemini Nano locally in Chrome to create a context-specific reply, DM, or post. Refine it with options such as Shorter, Punchier, More human, or + Question, insert it into the relevant box, and manually send or publish it.
Frequently Asked Questions
Quick answers to common questions regarding functionality, billing, and access