Technology

Email is insecure by default; you can encrypt messages if the recipient is on board, but that won't be the case for most people. You can use services like Proton Mail, Tuta Mail, Disroot, Autistici/Inventati, etc. (or self-host), and they're all better alternatives than Gmail, just don't expect secure communication

Definitely Proton Mail. That being said, avoid using emails for secure communications as the standard was never meant to be secure. Sure you can use PGP but it has no forward secrecy, meaning if your private key ever gets compromised, not just one email will be cracked but every single one you've ever sent. That's ignoring the fact that your recipient almost certainly has never even heard of PGP to begin with. It's not quantum secure either and thus living on borrowed time. TLDR use Signal for communication whenever possible.

I've started using protonmail, it's good so far but the storage is quite limited if you don't pay. Thankfully I get very few emails so that is not a problem for me.

Is there an alternative to google office? Something that has email and storage space and shared spreadsheets and shared documents?

What feature set are you looking for and are you wanting something free or open to paid?

I use both Mailfence and Protonmail different experiences with each but no real complaints. For Mailfence I pay them since I have a domain and I am still degoogling so forward my gmail to an alias there

disroot

I've been using mailbox.org for years. They are a security-conscious provider based in Germany.

I have been using tutamail for a few years now, have no complaints so far. I also heard that Protonmail is pretty good.

K-9 mail

Fastmail is what I use. It's fast!

Got my own domain too, it's fantastic as I can manage infinite emails easily, be my own domain manager, and it's like 3 bucks a month paid annually.

I want to get rid of ProtonMail eventually because they may be a honeypot.

1. Protonmail Behaves like a CIA/NSA “Honeypot”

Protonmail has an Onion domain that allows users to visit their site using the TOR browser. Protonmail even has an SSL cert for that onion address even though it’s completely unnecessary. When a user makes a new account with Protonmail on TOR they are re-directed from Protonmail’s “.onion” to “.com” address. This breaks your secure encrypted connection to their onion address, enabling your identification. There are absolutely no technical reasons for this feature. In fact, the only other websites that operate like this are suspected NSA/CIA Honeypots.

This is a huge security issue that was either created because Protonmail is managed by Particle physicists who do not understand computer security OR they have been forced to operate their website in a similar way as CIA/NSA honeypots. Both possibilities are serious concerns.

https://encryp.ch/blog/disturbing-facts-about-protonmail/

I'm planning to self-host my own email service, but that comes with its own problems, including major email services banning most IPs that are not other mainstream email providers for the sake of "spam protection".

https://vadosware.io/post/its-never-been-easier-or-harder-to-self-host-email/

https://cfenollosa.com/blog/after-self-hosting-my-email-for-twenty-three-years-i-have-thrown-in-the-towel-the-oligopoly-has-won.html

To hopefully counter this and to have a separate email for payments required to be able to host my own email service, I have an email on macaw.me and monocles.de (about monocles).