I'd argue Meta is much worse:

Palantir builds these systems for the US government which is (hopefully) something you can hold accountable / can reasonably trust.

Meta builds these systems for itself to make digital cocaine and sell personal data to profit off everyone (including and moreso primarily the elderly and children). You can't hold them accountable, actually pretty much nobody can hold Zuckerberg accountable.

When Palantir helps USG spy on the planet the primary purpose is defeat enemies + protect assets. When Meta builds these systems the primary purpose is digital cocaine.

Meta people used to protest and demand Thiel be removed from the board all the time, in the 2010s. But it’s probably not like that anymore.