Riff is a Chrome extension for replies on X, LinkedIn, Facebook and Instagram. Paste your point, and Gemini Nano, the AI built into Chrome, writes a fresh reply for that exact post, right on your computer. You press send.
No servers, no API keys, no monthly bill.
most landing pages lose people in 5 seconds. the headline says what you do, not what they get. i do free 15 min audits
Riff lives in Chrome's side panel. Open it from the toolbar or with Alt+Shift+R, and it follows whichever site you're on.
Click the wave button next to a post's Reply or Comment button. Riff reads the post, any quoted post, and the one above it in a thread.
Write it rough. Riff never copies it word for word. Save the ones you make often under Saved points.
Choose how smart, how salesy and how adventurous, then press Enter. The reply streams in, sized to the site's limit.
Rework it with Shorter, Punchier or More human if you like. Riff then fills the site's reply box, and sending is your call.
Riff reads the site from your tab and switches its limits, tone and link handling to match. Here's one post and one point, riffed four ways.
Spent the whole weekend redesigning our landing page. Traffic is fine. Signups haven't moved an inch. What am I missing?
most landing pages lose people in 5 seconds. the headline says what you do, not what they get. i do free 15 min audits
Flat signups on steady traffic usually means the first five seconds. Does your headline say what you do, or what they get? Lead with the outcome. I do free 15 min audits if you want a second look: yoursite.com/audit
Short and punchy, hashtags off by default.
Steady traffic with flat signups is one of the most fixable problems on the web. In most audits I run, the page explains what the company does, but the first screen never says what the visitor walks away with. Rewrite the headline as an outcome and give it a week. If you'd like a second pair of eyes, I do free 15-minute audits: yoursite.com/audit
Professional but human: a real perspective instead of “Great post”. Reads the author's headline too.
Oh, I feel this one. When traffic is fine but signups stay quiet, it's almost always the first five seconds. Make the headline about what people get. Happy to take a look, I do free 15 minute audits: yoursite.com/audit
Warm and conversational. Works on feed posts, groups, pages and permalink pages.
redesign weekends are the best kind of tired. if signups won't budge, sell the result in your headline. happy to look, i do free audits
Casual and short, reacting to the photo or caption. Links stay out, since Instagram comments can't click them.
Turn the pitch off when a post just deserves a good answer, or go direct when the moment's right. On personal, sad or off-topic posts, Riff suggests turning it off.
Plain keeps it simple. Sharp is smart and conversational. Expert brings precise terms and one non-obvious insight.
Auto reads the post and picks the play, or choose one yourself.
Safe, Steady, Fresh, Bold or Wild: how adventurous the wording gets, from predictable to maximum variety.
Length follows the site. On LinkedIn, Short is about 160 characters and Full about 650. Light means one emoji at most, only when it feels natural.
Or write in English, Spanish, French, German or Japanese.
Keep your links in the Library with a “use for” note, and Auto picks the right one for each post.
Press Enter and every reply goes through four stages. A draft that misses gets rewritten quietly, up to twice.
Gemini Nano reads the post and notes the topic, the author's mood, what they want and one detail worth picking up.
A session primed with your Voice and dials writes the reply, with a different opening move every spin.
The draft has to fit the limit, skip your Never say list and read as new next to your pasted point and your last 60 replies.
Labels, hashtags and em dashes come out, any link the model invented is removed, and your link goes where you asked.
Fill in Voice once: who you are, what you offer, who it's for, how you sound, and one reply you're proud of. Riff puts it behind every reply, and it stays on your computer.
Gemini Nano runs inside Chrome on your machine. Your Voice, links, saved points and reply history live in Chrome's storage on this computer. No servers, no API keys, no monthly bill.
Riff never presses Reply, Comment, Post or Enter. Each reply is written for one specific post and sent by you, which keeps you within the automation rules of X, LinkedIn, Facebook and Instagram.
Installing takes about two minutes. The first time you open the panel, click Download Gemini Nano. Chrome fetches the model once, and after that everything runs offline.
Add to ChromePanel says AI unavailable? Open chrome://on-device-internals to see what Chrome reports.
No. Riff fills the reply or comment box and stops there. You read it, and you press send.
No. Riff runs on Gemini Nano, the model built into Chrome, so there are no servers to sign up for and no keys to paste.
Riff reads posts on the desktop sites of X, LinkedIn, Facebook and Instagram. Anywhere else, paste the post into the panel and choose which site you're writing for.
Match the post replies in the post's own language. You can also pick English, Spanish, French, German or Japanese. Older versions of Chrome only support English, Spanish and Japanese on-device, and updating adds French and German.
That's what the Fresh score is for. Each spin opens a different way, avoids openings you've already used, and is checked against your last 60 replies.
Alt+Shift+R opens Riff. Enter riffs, Shift+Enter adds a line, Ctrl or ⌘+Enter inserts the draft, and Esc stops a riff.