Privacy Policy

Effective October 9, 2026

Riff is a Chrome extension that helps you write replies and comments on X, LinkedIn, Facebook and Instagram using Gemini Nano, the AI model built into Chrome. This policy explains what Riff handles, where it is kept and what it never does.

What Riff handles, and why

• The post you pick. When you click the Riff button on a post or open its comment box, Riff reads the post's text, its author's name (and headline on LinkedIn), any image descriptions, and any quoted post or the post above it in a thread, so it can write a reply for that post.
• What you type. The point you want to make, the drafts Riff writes and any edits you make, so it can write and rework your reply.
• Your settings. Your dial positions, your Voice profile (the name or brand, offer, audience, writing style and sample reply you choose to enter), your Never-say list, and the links and points you save in the Library.
• Recent replies. The text of your last 60 replies, used only to check that new drafts don't repeat you.
• Backups, only if you ask. Export to file saves your links, saved points and Voice profile as a file on your computer. Import from file reads a backup file you choose. Riff never sends these files anywhere.
• The active tab's address. Used only to tell which supported site you're on, so Riff can follow that site's limits and style.
• Diagnostics, only if you ask. The Copy diagnostics button copies a short technical report about the open tab (no post text) to your clipboard. It goes nowhere unless you paste it somewhere yourself.

Where it's kept

Your settings, Library, Voice profile and recent replies are stored in Chrome's extension storage on your computer. The post you picked is held in Chrome's session storage and is cleared when you close the tab or Chrome. All AI processing happens in Gemini Nano, which runs on your device. Riff never sends post text, drafts or anything else to a server.

What Riff never does

• It never sends your data to its developer or to any third party. Riff has no servers, analytics, ads or trackers, and loads no remote code.
• It never sells, shares or transfers your data, and never uses it for anything other than writing your replies.
• It never asks you to create an account or sign in.
• It never posts, comments or presses Send for you. You review every reply and send it yourself.

Your control

• Clear your recent replies any time in Voice → Clear.
• Edit or delete saved links and points in the Library, and change or empty your Voice profile whenever you like.
• Uninstalling Riff removes everything it has stored from Chrome.

Gemini Nano and Chrome

Gemini Nano is provided by Google as part of Chrome. Chrome downloads the model once, and Chrome itself is covered by Google's Privacy Policy. Riff only uses the model through Chrome's built-in Prompt API on your device.

Chrome Web Store User Data Policy

Riff's use of information complies with the Chrome Web Store User Data Policy, including the Limited Use requirements.

Who runs Riff

Riff is made by Zima Media OÜ, an Estonian private limited company, doing business as Riff. Riff is free to use. There is no account, subscription, or payment.

• Legal name: Zima Media OÜ
• Doing business as: Riff
• Registry code: 17241943
• Registered address: Sepapaja tn 6, Lasnamäe linnaosa, Tallinn, Harju maakond, 15551, Estonia
• VAT number: EE102861338

Changes

If this policy changes, the updated version will be posted on this page with a new effective date.

Contact

Questions about this policy? Use the developer contact email on Riff's Chrome Web Store listing.