Privacy Policy

Last updated: July 6, 2026

We don't know who you are, and we've built things so we can't find out. No account required, no cookies, no browsing history. If you do create an account (it's optional, always), it stays walled off from everything anonymous. The long version is below.

What Greenlens does

Greenlens is a browser extension and web app that shows public cosmetics safety ratings from independent sources while you shop on Amazon and Sephora. It does not require sign-in and does not track you across the web. An optional account exists for one purpose: syncing your shelf and settings across devices (see “Optional accounts” below).

Data the extension sends to our server

When you visit a supported product page, the extension sends the product's publicly visible name, brand, barcode (if present), and ingredient list to our server at usegreenlens.com. This is used solely to look up safety ratings and return them to you. We do not store the content of these requests; we record only an anonymous outcome event (see “Anonymous usage analytics” below). No personal information is included.

Anonymous usage analytics

To understand which features are used and where our catalog falls short, Greenlens records anonymous usage events, for example “a product page on sephora.com matched a rated product” or “a score card was opened”. Each event carries a random identifier stored in your browser, the event name, and minimal context: the site's hostname, a product id, and the match outcome. Events never include your name, email, full page addresses, search history, or any account identifier. Even if you create an account, analytics are never linked to it: the anonymous id and your account are unlinkable by design, on the server as well as in your browser. The web app honors your browser's Do Not Track setting, and the extension has a “Share anonymous usage data” toggle on its options page that turns this off entirely.

Data stored on your device

Your rating-source weights (how much you value safety vs. environmental vs. ethical scores) and your shelf (the products you have looked up) are saved in your browser's local storage, and the extension keeps a copy of the weights in chrome.storage.local. By default none of it leaves your device. If you sign in to an optional account, your weights and shelf sync to it so your other devices can see them; the browser also keeps a small local marker of which account it last synced with (see “Optional accounts” below).

Third-party services

Ratings data comes from Open Beauty Facts (openbeautyfacts.org), a public-domain database. Amazon product enrichment uses the Amazon Product Advertising API when credentials are configured; only the product ASIN is sent, not any user identifier.

Affiliate links

Some product pages link to Amazon with an affiliate tag. As an Amazon Associate, Greenlens earns from qualifying purchases. Clicking such a link takes you to Amazon, where Amazon's own privacy policy applies; the link itself carries no information about you beyond what any link click sends. Affiliate income never changes a rating or ranking. We record an anonymous count of affiliate clicks (product id and whether the link was a direct listing), under the same no-PII rules as all our analytics.

The Pro waitlist (where we ask for an email)

If you choose to join the waitlist for Greenlens Pro, we store the email address you give us, when you gave it, and which page you signed up from. That's its entire use: to email you about Pro. It is never linked to your usage analytics, never sold or shared, and you can ask us to delete it at any time by emailing the address below. Everything else on this page stays true: no account required, and nothing about your browsing is ever tied to your email.

Optional accounts

You can create a Greenlens account if you want your data to follow you across devices. Sync is the only reason accounts exist; every feature that shows you ratings works without one, and that will stay true. An account stores your email address, the product ids on your shelf, the ingredient names you watch, and your weight settings. It never stores your browsing history, and it is never joined to the anonymous analytics id described above. Deleting your account takes one click on the account page and removes every account record immediately.

What we do not do

• We do not collect names, emails, or any personally identifiable information, with two opt-in exceptions: an email you volunteer for the Pro waitlist, or the email you use for an optional account (see above).
• We do not sell or share any data with advertisers.
• We do not use cookies or cross-site tracking.
• We do not store your browsing history. Usage events carry a site's hostname and a product id, never the pages you visit.

Contact

Questions? Email vihaan.goyal1512@gmail.com.