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Everything is free. Perch and all four extensions, straight from here — no account, no sign-in, no telemetry.

Perch

free

Screen-share one tab and float a window on top of your work. A per-user install — no administrator, and no account.

Windows 11 · Intel or AMD (x64) Perch installer
Download for Windows
Windows 11 · ARM64 Perch installer
Download for Windows
macOS 14 · Apple silicon Perch disk image
Download for macOS
Needs
Google Chrome
Not code-signed
Neither build carries a certificate an operating system recognises, so macOS and Windows will each warn the first time. Why, what it costs you, and what you can verify instead.
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What Perch does · How it works

Extensions

free

Four Chrome extensions, each a zip. They do not overlap, and none of them needs the others.

Anti-Blur nothing pauses when you look away
Download zip
Sodium trackers stopped at the network
Download zip
Argon fingerprinting, shown and swapped
Download zip
Typeswap your fonts, on any site
Download zip
To install
Unzip it. Open chrome://extensions, turn on Developer mode top right, press Load unpacked and choose the unzipped folder — the one with manifest.json in it. Edge, Brave, Vivaldi and Opera have the same button.
Updates
Download the new zip, replace the folder, and press Reload on the extension’s card in chrome://extensions.
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Which one do I want?

From source

The repository is private while the account system is being built, so this is here for reference rather than as an invitation. It is what the build takes once you have the tree.

macOS

./build.sh

Windows

dotnet publish windows\Perch.Setup -c Release -p:PayloadRid=win-x64
You will need
Xcode command line tools on macOS · .NET 8 SDK on Windows

what you are agreeing to

No account

Perch and the extensions never ask you to sign in. Perch looks for its own updates by reading the public release list — the same one this page reads — and sends nothing about you with it.

No telemetry

No analytics, no usage counters, no record of what you opened, shared or typed. None of the four extensions talks to a server of ours at all.

No administrator

Both installers are per-user. Nothing is written outside your own account, and uninstalling puts it in the bin rather than deleting it.