My strategy about that is to avoid putting all my eggs on the same basket :

• Not using proton pass while bitwarden works like a charm
• Sticking to a custom domain for my mail address to ease a future migration

According to a wikipedia search that I could cross reference more, Proton AG is 500 employees and Alphabet is 190k (380 times Proton).

What is your definition of big tech? I was only including huge monopolistic monoliths, are they “huge tech”?