Viber and Whatsapp

I use Signal as my default messenger with my family and Whatsapp as my second messenger due to its large user base. For the same reason I was thinking of using Viber since many of my contacts are exclusively there.

Is Viber worse than Whatsapp or do they have the same privacy issues?

I have checked Exodus and it has a lot of trackers unlike Whatsapp which doesn’t and for me it is annoying to use something with ads and trackers.