For chat, something with e2ee and without phone numbers or centralized metadata. SimpleX, Matrix, XMPP, etc - each have their own problems, but at least they aren't centralizing everyone's metadata with a CIA contractor like Jeff Bezos like Signal is.

For email, I'd recommend finding small-to-medium-sized operators who seem both honest and competent. Anyone offering snakeoil privacy features such as browser-based e2ee is failing in at least one of those two categories.