Your result is yours.
Pulse needs a server to test against and a check against automated abuse, and nothing more. Here is what that means.
No account, no tracking
No analytics service, no ads, no cookies; only daily usage counts. The fonts are served from here, not from Google.
Results stay with you
The result is worked out in your browser and kept there. A share link carries the result inside it; nothing is stored on our side.
Who sees your IP
Our test server, while the test runs, because it has to send packets back to you; it does not write it down. Cloudflare, which hosts the pages and runs the browser check.
In detail
The test. Your browser and our test server in the eastern US send each other small packets and note when they arrive. The server sends its notes back to your browser during the test. When the test ends, the server forgets the session; it keeps one line per test without your address (length and packet counts), to see how much the server is used.
The website. These pages are delivered by Cloudflare Pages. Like any web host, it sees your IP address so it can send them to you.
The browser check. When you press Start, the page loads Cloudflare Turnstile, which checks that a person, not a script, started the test. It sends signals about your browser to Cloudflare and usually shows nothing; sometimes it asks you to tick a box. It is not loaded before you press Start. Cloudflare’s Turnstile privacy notice explains what it collects.
The speed test and “Under load”. Only if you press "Measure speed" or switch on “Under load”: your browser downloads and uploads test data from Cloudflare’s speed test servers, so Cloudflare sees your IP address. The speed test also reports its measurements to Cloudflare, as on speed.cloudflare.com; “Under load” sends Cloudflare nothing but the test data. We receive nothing from either.
The home network test. To pair your phone, both devices send their connection details through our server, which forgets them after the pairing or 10 minutes. The test itself runs straight between the two devices on your network. To find each other, both ask Cloudflare’s public STUN server which address they have, so Cloudflare sees that address.
Usage counts. To know whether Pulse is used, our server counts per day how often something happened: the site was opened, a test started, a feature was used (for example “speed test” or “home network test”). Only those numbers are kept: no cookies, no identifiers, no addresses, nothing that tells one visitor from another.
Your browser. Your last 20 results are kept in this browser (its local storage), so you can look back and compare; they never leave it, and “Delete all” on the History page removes them. Nothing else is stored on your device unless you press “Download result”.
Share links. “Share link” puts the result itself into the link, after the “#”, which browsers never send to a server. We store nothing; anyone you give the link to can see that result.
Last changed: 2026-10-26. This page changes before Pulse uses any other service.