The concern with Session is that theyre based in Australia, a country that is in the 5 eyes, and their government passed a bill forces companies to provide a backdoor when ordered to, the company cannot deny to create this, and they can’t declose that they got ordered to ether. [A great video talking about said bill] While the Session devs say their services are resilient to these threats, [see their FAQ] it’s best to remain cautious.