Riff
Fresh replies for X, drafted on your device
概要: Riff?
Riff is a free Chrome extension that drafts posts, replies and DMs for X, LinkedIn, Facebook and Instagram right in your browser. It runs on-device with Chrome's built-in Gemini Nano, so your text never leaves your computer. No account, no API key, free. Install it here: https://chromewebstore.google.com/detail/riff-fresh-replies-for-x/oapafjkedoiikjneaadcdojmophehfhl
Core capabilities
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.
You set how it sounds. Choose how smart, how salesy and how bold the reply should be. Tell Riff once who you are and how you write, and it follows that voice. Each draft is checked against your recent replies, so it does not repeat itself.
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
Fresh replies written for the exact post on X, LinkedIn, Facebook and Instagram
Answers DMs in LinkedIn Messaging, Messenger on facebook.com and Instagram Direct, and writes first messages
Drafts your own posts and X threads from rough notes, then edits them when you ask in plain words
Simple dials for tone, length, how smart, how salesy and how bold
Learns your voice once, with separate voices for brands you run
Runs on your computer with Gemini Nano. No account, no API key, no servers
Never posts or sends. It fills the box and you press send
Target audience and use cases
Reply to posts in your field on X without starting from a blank box
Leave real comments on LinkedIn instead of “Great post”
Answer DMs faster on LinkedIn, Facebook and Instagram, without agreeing to a time or price for you
Write a first message to a new contact, cold or warm
Turn rough notes into a LinkedIn post, an X thread or an Instagram caption
Reuse one post on another site in the right length and shape
Post as yourself or as your company, each with its own voice
Pricing
Riff is free. There is no account, no API key and no monthly bill. It is not a freemium product and has no free trial, because there is nothing to pay for.
Frequently asked questions
Is my data private?
Riff runs on Gemini Nano, the model built into Chrome, on your own computer. Your settings, notes, drafts and history stay in Chrome storage on that machine. There are no Riff servers, and you do not make an account.
Does Riff post or send for me?
No. Riff fills the reply, comment, message or post box and stops there. It never presses Reply, Comment, Post or Send, and it does not schedule anything. You read it and you press send.
What do I need to run it?
Desktop Chrome 138 or newer on Windows 10 or 11, macOS 13 or later, Linux or a Chromebook Plus. You also need about 22 GB of free disk for the one-time model download, Wi-Fi or ethernet for that download, and a GPU with more than 4 GB of video memory, or 16 GB of RAM and 4 or more CPU cores.
Is it free?
Yes. Riff is free. It runs on the AI built into Chrome, so there is no API key to buy and no monthly bill.
Which sites does it work on?
Posts on the desktop sites of X, LinkedIn, Facebook and Instagram. DMs in LinkedIn Messaging, Messenger on facebook.com and Instagram Direct. On other sites, you can paste a post into the panel.
The panel says AI is unavailable. What now?
Check that you meet the needs above. Then open chrome://on-device-internals to see what Chrome reports, and email zima@mail.grokbot.com.
About the maker
Riff is built by Michael Zima, Founder at Zima Media OÜ in Tallinn, Estonia. He replies a lot on X and LinkedIn and wanted a reply tool with no account, no API key and no monthly bill, so he built Riff on the AI inside Chrome. Website: https://riffreply.com. X: https://x.com/riffreplyapp.
Summary
Riff is a free Chrome extension that turns your rough point into a fresh reply for any post on X, LinkedIn, Facebook or Instagram. It uses Gemini Nano, the AI built into Chrome, so it runs on your computer with no account and no API key. It also answers DMs and drafts your own posts, and it never posts or sends for you.
Architecture, integrations and security
Riff does not call a cloud model. The writing is done by Gemini Nano, the foundation model that ships inside desktop Chrome, so there is no Riff server in the loop and no API for you to configure. Riff has no public API, no webhooks and no integrations with workplace tools. It works inside the browser on the desktop sites of X, LinkedIn, Facebook and Instagram, and on other sites you can paste a post into the panel. Because everything stays in Chrome storage on your own machine, there is no enterprise tier and no data processing agreement to sign. Riff is closed source and has no free tier limits, since the whole product is free.
How Riff fits into a normal day
A typical session starts when you open a post on X, LinkedIn, Facebook or Instagram in desktop Chrome. You open the Riff panel, type a rough point in your own words, and Riff drafts a fresh reply for that exact post using Gemini Nano on your computer. You can ask for it to be shorter, warmer or bolder in plain words, read it, change it, and then press send yourself. The same flow works for direct messages and for your own posts. Riff is a free tool made for people who write many replies and want the first draft done quickly without handing their text to a remote service.
Alternatives
Riff is a free, on-device option for people who use Taplio, Compose AI, Wordtune, Grammarly, HARPA AI, Merlin, Hypefury or Typefully to write social replies and posts.
主な機能・特徴
料金プラン・価格体系
Free tier / trial available; premium subscriptions unlock advanced limits.
よくある質問 (FAQ)
What is Riff and how does it work?
Riff is a dedicated artificial intelligence platform in the Coding & Web Development space, built to automate key workflows, save hours of manual effort, and deliver high-precision results.
What is the pricing model for Riff?
Riff operates under a Free Trial pricing model. Users can explore its core capabilities, with scalable plans available for advanced features and higher throughput.
Can Riff be integrated with existing productivity tools?
Yes, Riff supports standard web-based exports, API endpoints, or direct browser integration to seamlessly fit into your current operational stack.
Community Reviews & Ratings
Independent Editorial Evaluation
This score reflects our staff's hands-on testing across pricing, features, and reliability. No community reviews submitted yet. Have you used Riff? Be the first to share your experience!
No user reviews submitted yet.
Have you tried Riff? Be the first to share your experience!
Want to review Riff?
Sign in to leave a verified rating and feedback. Only verified members can rate tools to prevent spam.
Log In to Write a Review →おすすめの代替ツール Riff
Top-rated alternative AI software in AI Writing & Copywriting tested by our team.
View In-Depth Riff Alternatives & Feature Matrix →
Top Prompts & Workflows for Riff
Save time and extract maximum performance from Riff with these tested, high-yield system prompts:
You are an expert specialist in AI Writing & Copywriting. Analyze the following challenge and break it down into a 3-step high-yield execution plan: [Insert Project / Task Here]. Optimize for minimum latency and zero hallucinations.
Critically inspect the following output created by Riff: [Insert Content Here]. Identify edge cases, logic gaps, or tone inconsistencies, and return a polished, production-grade rewrite.
Adopt the persona of a senior technical lead. Provide a step-by-step workflow on integrating Riff with our existing stack. List recommended settings, shortcuts, and common pitfalls to avoid.
Embed the "Featured on AI Pulse" Badge
Are you the builder of Riff? Showcase your official editorial verification by embedding our high-res dynamic SVG badge on your website footer or documentation.
