Privacy Policy

Overview

This Privacy Policy explains how CenuFiltrs handles information when people use the price comparison platform, contact support or the WhatsApp service, create alerts, or interact with merchant-facing tools.

We keep the service focused on comparing offers, tracking prices, and helping users make informed purchasing decisions. Information is used for those product purposes and for platform security.

Information we collect

We collect only the information needed to operate the service, answer requests, and improve price comparison quality.

• Account details such as name, email address, authentication status, and language preference.
• Support request details submitted through contact forms, including message content and optional phone number.
• Shopping activity such as searches, saved products, price alerts, recently viewed items, and click-through events.
• Technical data such as device type, browser, approximate region, logs, and security events.

Analytics and cookies

With your analytics consent, CenuFiltrs uses Google Analytics 4, provided by Google LLC, to measure visits to public pages, traffic sources, and Core Web Vitals. The Google tag is not loaded before consent.

Google Analytics may set first-party cookies such as _ga and _ga_* and process device, browser, approximate location, referrer, and page interaction data. Our integration excludes account, authentication, profile, admin, and merchant routes; disables Google advertising signals and ad personalization; and sends custom page-view URLs without query strings.

• You can grant, refuse, or withdraw analytics consent at any time through Cookie settings in the footer.
• Withdrawing analytics consent disables further GA collection and removes accessible Google Analytics cookies.
• CenuFiltrs does not send account IDs or email addresses in its custom Google Analytics events.

Google Sign-In data

If you choose Continue with Google, Google authenticates you and returns a limited identity profile to CenuFiltrs. We use it only to create, sign in to, or link your CenuFiltrs account and to display the profile information you choose to share.

• We receive your stable Google account identifier (sub), email address, email verification status, given name, family name, display name, and profile image when available.
• We store the Google account identifier and minimal profile metadata in the CenuFiltrs user and social identity records so later sign-ins resolve the same account.
• Google access tokens, refresh tokens, and ID tokens are used during authentication and are not stored in the CenuFiltrs database.
• We do not use Google Sign-In data for advertising, sell it, or request access to Gmail, Drive, Calendar, contacts, or other Google services.

Browser extension

The CenuFiltrs browser extension for Chrome, Edge and Firefox is a sidebar for searching and comparing prices. It has no content script: it never reads, modifies or injects anything into the pages you visit, and it holds no permission to access websites other than cenufiltrs.lv and our API.

Data handling matches the website, because the extension talks to the same API. This section describes what is additionally stored on your own device.

• Stored locally in the extension's own storage: your session tokens, the interface language and appearance preferences, and a randomly generated device identifier used to deduplicate clicks. Signing out removes the tokens.
• The cookies permission is used for one purpose only: reading the CenuFiltrs session cookie on cenufiltrs.lv, so that if you are already signed in on the website you do not have to enter your password again in the sidebar. No cookie of any other site is read.
• Sent to our API: your search queries, the offers displayed to you, and the offer you click. These are processed exactly as they are for the website.
• Not collected: your browsing history, the addresses of pages you visit, page content, form data, or anything from other browser tabs.
• Uninstalling the extension deletes everything it stored on your device. Data already associated with your CenuFiltrs account is governed by the retention and rights sections above.

MCP server and AI connectors

CenuFiltrs runs a Model Context Protocol (MCP) server at mcp.cenufiltrs.lv. It lets an AI assistant such as Claude or ChatGPT search offers, read price history and, once you sign in, work with your wishlist, price alerts and search history on your behalf. Connecting is entirely your choice, and you can disconnect the connector in your assistant at any time.

The connector reaches the same API as the website, so what is collected and why matches the sections above. This section describes what is specific to using CenuFiltrs through an AI assistant.

Because your assistant is operated by another company, anything CenuFiltrs returns to it — and anything you type into it — is also processed by that company under its own privacy policy, not ours. We have no access to your conversation with the assistant and no control over how it stores it.

• Sent from your assistant to us: the search query and filters chosen by the assistant, and — when you have signed in — the requests it makes on your behalf to your wishlist, price alerts, comments and search history. Anonymous use is possible: search, prices, categories, stores and reviews need no account.
• Returned to your assistant: offers, prices, price history, categories, stores and public reviews, plus links to the retailer. Your assistant, and therefore its operator, sees everything we return.
• Never sent to your assistant: your password, your payment details or another user's personal data. Signing in happens on cenufiltrs.lv, not inside the assistant, so your credentials are never passed through it.
• Stored by us for the connection itself: the assistant's client registration and the tokens that keep the session alive. Sign-in codes expire after 5 minutes, an access token after 1 hour, and a connection ends after 30 days at the latest, after which the assistant must ask you to sign in again. Rendered result cards are cached for 15 minutes.
• Retailer links opened from the assistant carry a channel marker (ch=mcp) and technical identifiers used for click counting and billing, exactly as described in the sharing section above.
• How we earn: retailers pay us for clicks their offers receive, and some placements are paid campaigns, which carry an Advertisement label. You pay nothing, and the price at the retailer is the same whether or not you arrived through the connector. See section 6 of our Terms of Service.
• Not collected: your conversation with the assistant, its system prompts, or any data outside the specific request you asked it to make.

WhatsApp conversations

If you choose to contact CenuFiltrs through WhatsApp, WhatsApp sends us the information needed to receive your message and reply. Using WhatsApp is optional. Your conversation is not linked to a CenuFiltrs account unless we offer a separate account-linking feature and you choose to use it.

We use this information to answer searches or support questions, remember the language and short-term context of the conversation, deliver replies, prevent duplicate messages, and keep the service secure. We process it to provide the service you asked for and for our legitimate interest in running a safe, reliable service. We would ask for your clear consent before sending any optional alerts or marketing messages outside an active conversation.

• We may receive your WhatsApp phone number or account identifier, profile name if you make it available, the messages and attachments you choose to send, button or list choices, message times, and delivery, read, or error status. We do not ask WhatsApp for your address book or contacts.
• Your raw phone number and WhatsApp identifier are used only where needed to receive and send messages. They are not passed to CenuFiltrs search analytics, used as advertising identifiers, or written to application logs. Your search text is also kept out of application logs.
• We keep only brief technical context for the chat: search and filter context for about one hour, duplicate-delivery and conversation-window records for up to 24 hours, retry records for minutes, and your language choice for up to 30 days. These records use a protected, unreadable reference instead of your raw WhatsApp identifier wherever possible.
• Meta and WhatsApp carry the messages between you and CenuFiltrs and process related information under their own terms and privacy policy. They may process information in other countries as explained in that policy.
• We do not sell information from WhatsApp conversations or use it to build advertising profiles. Retailers receive only the normal information needed when you choose to open one of their offers; they do not receive your WhatsApp number from us.
• You can stop the conversation at any time by no longer messaging us or by blocking the CenuFiltrs business account in WhatsApp. If we later offer optional alerts, each sign-up will explain what you will receive and how to withdraw your consent. Stopping WhatsApp messages does not affect your ability to use the CenuFiltrs website.
• You can use the Contact Us page to ask for access, correction, export, or deletion of information held by CenuFiltrs about your WhatsApp conversation. Please avoid sending passwords, payment card details, identity documents, health information, or other sensitive information in chat.

• Read the WhatsApp Privacy Policy

How we use information

CenuFiltrs uses information to provide accurate search results, maintain account features, protect the platform, and communicate with users when support is requested.

• Show relevant offers, product pages, retailer information, and price history.
• Send requested notifications such as price alerts or account messages.
• Investigate incorrect prices, suspicious activity, abuse, or technical errors.
• Measure aggregate platform performance and improve user experience.

Sharing and processors

We do not sell personal information. Limited information may be shared with service providers who help operate infrastructure, analytics, payments, email delivery, support, or security monitoring.

• Retailer redirects may include technical identifiers needed for click tracking and billing.
• Processors are expected to handle information only under CenuFiltrs instructions.
• Information may be disclosed when required by law or needed to protect users and the platform.

Your choices and rights

Users may request access, correction, deletion, or export of personal information where applicable. Notification settings and saved items can be managed from the account area when available.

• You can contact support for privacy requests.
• You can unsubscribe from non-essential communications.
• You can ask us to correct inaccurate account or support information.
• You can delete your account from the profile area. If you cannot access it, request deletion through the Contact Us page.

Retention and security

Account and linked Google identity data are retained while your CenuFiltrs account remains active. Account deletion removes the user record and linked social identities, subject to limited retention required for legal obligations, fraud prevention, security, or audit records.

CenuFiltrs uses technical and organizational safeguards designed to protect information from unauthorized access, alteration, disclosure, or loss.

Contact

For privacy questions, support requests, or data rights requests, use the Contact Us page.