Orion Browser is described as 'WebKit-based privacy browser supporting Firefox and Chrome extensions, zero telemetry, built-in ad-blocker, anti-tracking, fast performance, and native integration' and is a Web Browser in the web browsers category. There are more than 50 alternatives to Orion Browser for a variety of platforms, including Mac, Windows, Linux, Android and iPhone apps. The best Orion Browser alternative is Mozilla Firefox, which is both free and Open Source. Other great apps like Orion Browser are Zen Browser, Brave, Google Chrome and Tor Browser.
I like Safari as an alternative to Orion because Safari looks similar and is based on the same Webkit base