Reads a bit like an ad, and doesn't look into self-hosted KeepassXC, which is also memory safe.
I don't trust any online password managers anymore. Too much juicy data collected in one place, too many intermediaries all doing the right thing to rely on. And as the link I posted says, if the attacker has malware on your machine already, memory safety is a final defence but you're likely already compromised.
https://youtu.be/LEOnIpO7Xgw