The Catalyst browser has been designed from the ground up to provide a privacy-focused experience. The only server that Catalyst connects to is the update notifier, with no private information sent.
All Catalyst code is free and open source for anyone to inspect and review. It is all licensed under MIT and anyone can review all of the code.
Catalyst is based on Electron, which supports almost all features of Google Chrome with peace of mind. Catalyst also has an elegant user interface with no unnecessary distractions.