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ItalianoPrivate AI chat,right inside Chrome.
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.
The post says signups stall when the first screen explains the company instead of what the visitor gets. Three angles for a comment:
- Agree, and add the one-line test you use on headlines.
- Push back a little: traffic quality matters as much as the headline.
- Share a quick before and after from a real audit.
Spent the whole weekend redesigning our landing page. Traffic is fine. Signups haven't moved an inch. What am I missing?
LinkedIn post · as you
Angle 1: agree, and add the one-line headline test.
Same traffic, flat signups? Read your first screen out loud. If it says what you do, not what they get, that's the leak. My one-line test: could a stranger repeat the outcome after five seconds? What does your first line say?
- No account
- No subscription
- Runs on your computer
- Chrome, Brave and Edge on desktop
Riff is a free extension for Chrome, Brave and Edge. Chat in Riff Home, a full tab of its own, and write replies and posts in the 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 servers, no API keys, no monthly bill.
Works whereyou post.
The side panel opens next to the site you're on. Riff reads the post you pick and writes to that site's length and tone, in the language of the post. It fills the box, and you press send.
X
Works- Replies, counted the way X counts
- Posts and numbered threads
- X Chat messages
- Comments up to 1,250 characters
- Posts up to 3,000, hook before “see more”
- Messaging
Threads
Works- Replies up to 500 characters
- New threads
- Messages
- Comments on posts, groups and pages
- Posts
- Messenger on facebook.com
- Comments, with links left out
- Captions up to 2,200
- Direct messages
YouTube
Works- Comments on videos and Shorts
- Replies to comments
- No links, so comments aren’t held for review
Slack
Works- DMs, channels and threads
- Writes like a helpful colleague
- In the browser, not the desktop app
Microsoft Teams
Works- Chats and channel conversations
- Friendly and clear, no sign-off
- In the browser, not the desktop app
16 languages
Riff answers in the language of the post, or always in yours. Gemini Nano writes 5. Download Gemma 4 once, and Riff writes all 16.
Gemini Nano and Gemma 4Gemma 4
Ask aboutany page.
Right-click any page and Riff reads it into a chat. It reads a page only when you ask, and the text stays in this browser.
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1Right-click, ask
Right-click a page and choose Ask Riff about this page, or select a passage first. Riff Home opens with the page attached.
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2Chat about it
Ask for a summary, the counterargument or three angles for a reply. A page too long for the model is trimmed to fit, and the chat says so.
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3Start from anywhere
Type riff and a space in the address bar to start a chat, or press Alt+Shift+H to open Riff Home.
Riff reads a page only on your click. Chats are kept in this browser, and you can export or delete them anytime.
Think LM Studio,inside Chrome.
Start with the model built into Chrome, download a bigger one in a click, or connect the model apps you already run. Every one of them runs on your computer.
Gemini Nano
Chrome's own on-device model. Chrome downloads it once, then it runs offline. Writes English, Spanish, French, German and Japanese.
Gemma 4
Google's open model, running on your graphics chip inside the browser. Writes 16 languages, and works in Chrome, Brave and Edge.
LM Studio and Ollama
Already run local models? Connect the app and use any chat model it serves. Riff only talks to your own computer, and only after you press Connect.
From chat to post.No copy and paste.
Any answer in Chat can become a post. Make it a post opens the side panel's Post builder, with the answer as your notes.
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1Make it a post
Press it under any answer. The side panel opens on the Post builder, with that answer as your notes.
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2Shape it
Pick one of 3 hooks, or ask for changes in plain words: “shorter”, “open with the number”. Every answer is a new version.
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3Insert, then press Post
Insert puts the draft in the post box on LinkedIn, X or Facebook. You read it and press Post yourself.
Your point,freshly riffedfor every post.
The side panel writes where you post. Pick the post, add your point and press Enter. Insert puts the draft in the box, and you press send.
Replies
Riff reads the post and what it answers, then writes around your point for that one post. Shorter, Punchier or More human in one click.
Posts and threads
Drop rough notes, pick one of 3 hooks and say what to change. Split it into an X thread, or rework it for another site.
DMs and chats
LinkedIn, Messenger, Instagram and X Chat, plus Slack and Teams. Riff answers what they asked and never agrees to a time, a price or a yes for you.
Sounds like you.Not like AI.
Riff learns how you write, then checks every draft before you see it.
Interviewed by your own model
Riff's model asks one question at a time, on this computer, and turns each answer into a card you can save, edit or skip.
A voice per brand
Post as yourself and as your company. Each brand gets its own voice, and the side panel's “as” picker switches between them.
Fresh every time
Every draft is checked against your last 60 replies and redrafted if it repeats you. Out of the box, it never says:
Built for peoplewho post for a living.
Four ways people use Riff every day. Each has its own page with the details.
Answer every comment in your own voice.
YouTube, Instagram, Threads and X, without sounding like a bot.
See how → AgenciesA voice per client. Client material stays on your computer.
Brand voices, recipes and links for every client, and no seats to buy.
See how → Small businessesPosts and customer replies, done between customers.
Plan the week's posts and answer DMs without promising a price or a date.
See how → SolopreneursReply all day. Pay nothing per reply.
Keyboard-fast replies on X and LinkedIn, each one fresh and sent by you.
See how →Private by design.Never posts for you.
Your stuff stays put
Your chats, Voice, Library and reply history live in this browser. The only network traffic is the one-time model download and, after you press Connect, LM Studio or Ollama on your own computer. No account, no servers, no monthly bill.
You press send
Riff never presses Reply, Comment, Post, Send or Enter. It puts a draft in the box you chose, and you decide what goes out.
Fair questions
More answers in Help →Is Riff really free?
Yes. There's no account and no subscription, because nothing runs on a server. Your computer does the work.
Does anything leave my computer?
What you type doesn't. Chats, drafts and your Voice stay in this browser. Riff downloads a model once, and it talks to LM Studio or Ollama only on your own computer, after you press Connect.
Will it run on my computer?
Most recent desktops can run Gemini Nano or Gemma 4. Check yours in a few seconds with the computer check on the Features page.
Does Riff post for me?
No. Riff fills the reply, comment, message or post box and stops there. It doesn't schedule or publish anything. You read it, and you press send.
Which sites and languages does it cover?
X, LinkedIn, Threads, Facebook, Instagram and YouTube, plus DMs on LinkedIn, Messenger, Instagram, Threads and X, and Slack and Teams on the web. Gemini Nano writes 5 languages and Gemma 4 writes 16. Anywhere else, paste the text into a chat or the panel.
How is it different from Gemini in Chrome?
Gemini in Chrome is Google's own assistant, for people with a Google account. Riff needs no account, runs its models on your computer, and writes in your voice where you post.