Privacy policy

Last updated October 11, 2026.

Who is responsible for your data

kWhCompare.com is owned and operated by Aleix Viñals, an individual based in Mataró (Barcelona), Spain, who is the data controller for this website. Contact: hello@kwhcompare.com. See the legal notice for full owner details.

What we collect

Numbers you type into our calculators (state, kWh, bill amount, ESI ID) are processed in your browser and never sent to us. Your last entries may be remembered in your browser's local storage so you don't have to retype them; you can clear this in your browser settings. We don't ask for your name, address or bill.

Emails you send us

If you write to hello@kwhcompare.com, we use your email address and message only to reply to you, and delete them when they're no longer needed.

Hosting and security

The site is hosted by Cloudflare, which processes technical data such as IP addresses to deliver pages and protect the site from abuse.

Advertising and cookies

We use Google AdSense to show ads. Google and its partners use cookies and similar technologies to serve and measure ads, including ads based on your prior visits to this and other websites. Learn how Google uses information from sites that use its services. You can opt out of personalized advertising in Google's Ads Settings or at aboutads.info. Visitors in the European Economic Area, the UK and Switzerland are asked for consent before personalized ads are shown, and can change their choice at any time.

Analytics

We may use privacy-friendly analytics to count visits and improve pages. This data is aggregated and not used to identify you.

Affiliate links

Some links to electricity plans may be affiliate links. If you sign up through one, we may earn a commission at no cost to you. This never changes the rate you're offered.

Legal bases (EU and UK visitors)

We process data on the basis of your consent (advertising cookies), our legitimate interest in running and protecting the website (hosting and security), and to answer messages you send us.

Your rights

Under the GDPR you can request access to, correction or deletion of your personal data, object to or restrict its processing, and withdraw consent at any time, by writing to hello@kwhcompare.com. You can also complain to the Spanish Data Protection Agency (aepd.es). California residents have rights under the CCPA, including the right to know and delete personal information; we don't sell personal information. Because we don't collect personal information directly, most requests can be handled by clearing your browser's cookies and storage.

Children

This site isn't directed at children under 13 and we don't knowingly collect their information.