[hans_castorp]

Qwant and Ecosia for search engines come to mind.

Threema and Signal for messengers.

[alexh1]

Interesting, I was just looking at Qwant this morning.

They seem different to other search engines in that they actually have their own index rather than just proxying to another engine (e.g. Bing)

[type0]

They do have their own indexing but I thought they were also using Bing to some extend

[gostsamo]

They use Google I think.