Privacy policy

Last updated: November 3, 2026

Lumi GEO is an extension for the Chrome browser that analyses the open web page: what AI crawlers see of it, structured data, AI crawler access, SEO basics, llms.txt file.

Who is responsible

The data controller is Mattéo Springmann, sole proprietor (French micro-entreprise), SIREN 108 123 233, registered in France. Contact: [email protected].

Data collected

None for the analysis. Lumi GEO does not collect, transmit, sell or share any browsing data: the pages you analyse and their results never leave your device.

The only exception is the optional Pro subscription (see below): it is handled by Lemon Squeezy, which receives the information needed for the payment.

How it works

• The analysis only happens when you click the extension icon, and only on that tab.
• It runs entirely in your browser. No server belonging to the publisher is contacted, and the analysis uses no external API.
• To check the /robots.txt, /llms.txt and /llms-full.txt files, and to get the raw HTML of the page ("robot view"), the extension requests them from the site you are visiting, exactly as your browser would (the raw HTML is requested without cookies, as a crawler would). With "Analyse the site" (Pro), when you click it, the sitemap and up to 20 pages of the same site are requested in the same way, one after the other. No other address is contacted.
• The speed of the page (Core Web Vitals) is read from the measures Chrome already makes while the page loads, and the trust signals (about page, contact details, legal pages…) from the page itself: nothing is sent.
• The detailed results are not stored and disappear when the panel is closed. Only the final score is kept (see below).
• The interface language follows the language of Chrome: nothing is stored or sent for it.

Local storage

The extension stores in your browser (chrome.storage.local), and nowhere else:

• your interface preferences (animations on or off, Lumi's introduction already seen);
• if you subscribed: your license key and the identifier of its activation in this browser, and your last known plan (Free or Pro, status of the key, email of the purchase), so that a subscriber keeps Pro for a few days without a connection;
• the score history of each analysed page (address of the page without its parameters, date, overall score and scores of the 4 pillars), to show how it changes. At most 30 analyses per page and 300 pages; the oldest are forgotten first;
• for the free plan, the daily count of analyses (5 different pages a day): today's date and a short code computed from each page analysed today. The code does not contain the address of the page and it cannot be read back from it. This count starts again every day.
• for the free plan, whether the PDF audit offered was already used: a number and the date of that audit, nothing about the page.
• for the PDF audit, the brand you typed (name or agency, website or email, logo) and the last type of report chosen, so that you do not type them again;
• your answer to the review request (later, no thanks or done) and its date, so that it is not asked again.

This information never leaves your device. You can erase the score history at any time (Settings › "Clear the score history"); the daily count replaces itself every day; everything disappears if you uninstall the extension.

Lumi AI (Chrome's built-in AI)

When you click "Ask Lumi", the text of the analysed page is read by the AI built into Chrome (Gemini Nano), which runs on your computer. No text is sent to a server, to the publisher of Lumi GEO or to an online AI service. The first time, Chrome downloads its AI model (only once, from Google): Chrome handles this download, not Lumi GEO. The AI's answers are not stored.

PDF audit

The audit is built in your browser. Its data goes through Chrome's session memory (chrome.storage.session), emptied when the browser is closed, then is displayed in an extension tab, with the client's name and the note you typed for this audit. The PDF is created by Chrome's print feature: no online service is used. "Copy the prompt" only copies a text to your clipboard when you click it: you choose whether to paste it into an AI assistant.

Pro subscription (optional)

Lumi GEO Pro is a paid subscription. Payments are handled by Lemon Squeezy (lemonsqueezy.com), the official seller (merchant of record): the payment page is theirs, and Lumi GEO never sees your card number.

• After the payment, Lemon Squeezy sends you a license key by email. You paste it in Lumi GEO (Plans).
• Nothing is sent to Lemon Squeezy as long as you have not entered a key.
• With a key, the extension sends to Lemon Squeezy's License API (api.lemonsqueezy.com) only the key, the identifier of its activation and the label "Lumi GEO (Chrome)": when you activate it, each time the panel opens (to check that the subscription is still active), and when you remove it from the browser.
• Lemon Squeezy receives what you enter on its payment page (email address, payment details, billing address) and processes it under its own privacy policy: Lemon Squeezy.
• No browsing data and no analysis result is ever sent to it.

Analytics and advertising

None. The extension contains no analytics tool, no tracker and no advertising.

Permissions requested

Purposes of processing, legal bases and retention periods

For each use, here is the purpose (what the data is for), the data concerned, the legal basis and the retention period. No data is ever sold, rented or used for advertising, and no automated decision is made about you.

In the extension, on your device only (this data never reaches us):

• Analysing the open page: the content of the page and the results of the analysis. Retention period: the details disappear when the panel is closed; the data of a PDF audit stays in Chrome's session memory until the browser is closed.
• Showing how the scores change: address of the page without its parameters, date, overall score and scores of the 4 pillars. Retention period: 30 analyses per page and 300 pages at most (the oldest are forgotten first), until you clear the history or uninstall the extension.
• Limiting the free plan to 5 pages a day: today's date and a short code for each page analysed (without its address). Retention period: one day, then replaced.
• Remembering your settings: interface preferences, the brand of your PDF audits, your answer to the review request. Retention period: until you change them or uninstall the extension.

Pro subscription:

• Providing the subscription you bought (checking that the license key is valid): license key, ID of its activation and the label "Lumi GEO (Chrome)", sent to Lemon Squeezy; your last known plan (including the purchase email address), kept in your browser. Legal basis: performance of a contract. Retention period: in your browser, until you remove the key or uninstall the extension; the last known plan is replaced at each check and keeps Pro for 7 days at most without a connection.
• Selling the subscription, invoicing it, handling cancellations and refunds: email address, name, billing address and payment method, entered on the checkout page of Lemon Squeezy, the merchant of record. In our Lemon Squeezy seller account, we see the email address, name, country and subscription status of each customer, never their card number. Legal basis: performance of a contract and legal obligations (invoicing). Retention period: set by Lemon Squeezy, under its privacy policy and legal obligations.

Contact:

• Answering your emails (support, questions, refund requests or requests to exercise your rights): your email address and the content of your messages. Legal basis: our legitimate interest in answering you. Retention period: 3 years after the last exchange, then deleted.

Website (lumi-geo.pages.dev):

• Measuring the audience of the website (knowing which pages are read and whether the "Add to Chrome" and "Go Pro" buttons are used): the cookie-free visit data detailed in "The website" below. Legal basis: our legitimate interest in improving the site. Retention period: 25 months at most.
• Serving the website and protecting it (hosting by Cloudflare): IP address and technical connection data, processed by Cloudflare to serve the pages and block attacks. Legal basis: our legitimate interest in running and securing the site. Retention period: set by Cloudflare (see its policy); we have no access to these logs.
• Remembering your language: your FR or EN choice, saved in your browser only (lumi.lang) and never sent. Retention period: until you clear the site's data in your browser.

Providing data is never required to use the free extension or to visit the website. The license key is needed to use Pro, and the checkout information to buy it. No processing relies on your consent.

Recipients and transfers outside the European Union

• Lemon Squeezy (United States): payments, invoices, license keys, as the official seller (privacy policy).
• Cloudflare (United States): hosting of the website and its cookie-free visit counts (privacy policy).
• Penra (Globatics): cookie-free visit statistics of the website, as our processor; data hosted in the European Union (Ireland), some of its providers are in the United States (privacy policy).
• Google: only if you use "Ask Lumi", Chrome downloads its built-in AI model once, from Google; no text of the analysed page is sent.

Transfers to the United States are covered by the safeguards of the GDPR (EU–U.S. Data Privacy Framework or standard contractual clauses). We never sell or rent any data.

The website

The Lumi GEO website (lumi-geo.pages.dev) uses no cookie and no advertising. It measures its visits with two services that create no visitor profile and do not follow anyone from one site to another:

• Cloudflare Web Analytics: pages viewed, referring site, country and browser type only.
• Globatics (by Penra): pages viewed, referring site, screen size, language and time zone, clicks on links and buttons (with their short label, digits and email addresses masked), clicks towards the Chrome Web Store and the payment page, errors and speed of the pages. It sets no cookie and writes nothing in your browser; it does not store IP addresses, and its visitor identifier changes every day.

The extension itself sends none of this: it has no statistics at all. Like any host, Cloudflare may process technical data (such as the IP address) to deliver the pages and protect the site. The site remembers your language choice in your browser only.

Your rights

You can ask to access, correct or delete your data, object to its use, ask for its portability or for a restriction of its processing: write to [email protected], we answer within one month. For the payment data, you can also contact Lemon Squeezy directly. If you think your rights are not respected, you can lodge a complaint with the CNIL (French data protection authority, cnil.fr).

Contact

For any question: [email protected]