A free, open desktop app that shows you every place your machine is quietly phoning home, in plain words instead of IP addresses, and lets you cut the surveillance with one switch. It runs entirely on your computer. It can’t sell your data, because it never has it.
Most blockers work in the dark and ask you to trust that they’re doing something. Sieve does the opposite. It shows you the surveillance first, so cutting it is a decision you make, not a promise you swallow.
Open Sieve and it lists every connection your apps and your operating system are making right now, matched against open tracker datasets and named in plain language. Windows telemetry. A Google tracker. A Facebook SDK. The point lands in ten seconds: your own laptop is talking to a lot of people you never met.
live connections · open tracker data · named per app
It separates the surveillance from the traffic you actually want. Your messenger reaching its own server is fine and stays fine. The analytics endpoint hiding inside a music app is not, and gets flagged. You make the calls; Sieve just makes them visible.
tracker vs first-party · per-app rules · you decide
One switch adds the surveillance to your system's local blocklist so it can't be reached. No kernel driver, no VPN company in the middle, reversible in a click. Turn off the telemetry baked into your OS while you're there. None of this leaves your computer.
local blocklist · reversible · nothing leaves
Sieve cuts the link between your machine and the companies watching it. That is a real, specific job, and it is not the same as making you invisible. We’d rather draw the line clearly than sell a false sense of safety.
Every line of Sieve is public on GitHub under the GNU AGPLv3. The tracker data it matches against is open too, so a claim like “this is a Facebook endpoint” is something you can check, not something you take on our word. A tool built to fight surveillance has no business being a black box.
It’s free, and it always will be. There is nothing to upsell and nobody to sell you to. It’s being built in the open right now, and help is welcome.