It depends on what the third party is. The chances that your google account gets hacked because of lax security practices on google's part, is probably orders of magnitude lower than your typical F500 company getting hacked because they forgot to patch their machines.
Re:Self hosting is important
by JetSpiegel on Saturday July 24, 2021 @04:18PM
(#27944118)
They just roll over all government requests for data, so that's a lot of APT that are neutralized.
When you see that large companies get hacked all the time with you sensitive info and password released in the wild, it makes you think twice about "security" when your data is not in your hands. I'd say both are dangerous anyway, and certainly trusting a third party with any kind of data is a big gamble (plus, they may be spying on you as well).