BuyFromEU

mailbox.org is it for me.

Standard E-Mailing - Use whichever client you want, or the web client, which is also pretty good. They also have custom domain support if you're aiming for that. I use it like that too.
Calendar: Fantastic, create multiple calendars, subscribe to .ics via web or import .ics
Contacts: It's just there, and syncs nicely with Android Apps like DavX5 and ICSx5
Drive: 10GB for Mails, 5 GB for Files. Webdav Support. Storage can be upgraded and downgraded on demand as you wish.
They even provide an integrated video conferencing system, so you can schedule calls, have them on demand, or have them created with your meetings, like f.e. Google Calendar or Microsoft Calendar does.

Also their office suite is really good. So you can edit, in browser, DOCX, XLSX, ODF, etc, just like you can in Google Drive. I solely edit my Spreadsheets with their online solution, it's great for 95% of the tasks. (I'm a developer + spreadsheet nerd)

For todos and notes I however go with superlist.com. Subscribed to their Premium version, and once you get the hang of it, it's really powerful and great.

Not sure what else Proton offers, but Mail, Drive, Calendar, Contacts, Conferencing, light office work and Notes + Todos I can reliably manage with mailbox.org and superlist.com.

Mail.com

vivaldi, disroot, posteo

How about fastmail? I'm on a demo account with them right now -- with the exception of some relay restrictions that are especially annoying, it seems a good option, but I'm not familiar at all with them.

Hosting provider. 2€ a month for 100 addresses, custom domain and 10 gigs of (shared) storage at hetzner for example. Website possible as well.

Mail: mailbox.org or systemli (if you know a user who can invite you)

Calendar: EteSync with DavX5 somehow, needs to be hosted somewhere, I dont know a provider

Notes: no idea, I personally use Syncthing with local notes, but the lack of symlinking on android makes this subpar to "sharing notes with others" on cloud connected notes

Drive: Nextcloud, NFS share, syncthing

VPN: AirVPN, Mullvad, maybe others like incognet

The trick to avoid vendor lock in on email providers is to use ones that let you use a custom domain. This way when you move providers all you have to do is update the DNS records for that domain andall mail will start getting delivered to the new provider pretty much straight away.

mailbox.org

I use Tuta but unfortunately I cannot recommend it for a few reasons:

1. They use a proprietary encryption algorithm so you can only a) encrypt emails going to other Tuta accounts and b) use their clients (no Thunderbird etc.)
2. They're glacially slow with feature developments. Case in point email import has been on their list since forever and they only came out with it last year, but it's still in beta and exclusive to highest subscription tier.
3. I don't find their client very user-friendly.

I’ve been testing Forwardemail.net as my use case also involves being able to run mailing lists as well as personal and transactional email. I plan to switch over completely once they have set up servers in the EU, something they announced late last year and are actively working toward.

Just going to put this here because idgaf about downvotes; i didn't decide to leave proton despite those questionable statements. I'm reading all the alternatives in the comments and might check some i haven't heard about out, but i am very likely to stay with Proton at least in the near future. For me they offer a good product. What i did do to make switching easier is not use their own mail forwarding or simplelogin but i use addy.io instead, can totally recommend it.

Posteo.de

Infomaniak KSuite+ (email + cloud + a few other stuff): works great under Linux, unlike Proton Drive.

€: Bonuspoints if there are no “special discounts”.

Why would that be?

I mean, Infomaniak KSuite is not expensive (something like 2€/month) but I happily applied the neat discount I was offered by them a year ago. I just renewed for a year and they seem to be willing to keep the discount running, why would I not want to use it?

Always use a custom domain for mail, it's cheap and most providers (that are good support it).

For those wondering, the Proton CEO (who is a bit limited in power compared to most CEO's) agreed with a statement from Trump, doubled down on that and was generally stupid about it.

There are tons of others things to leave Proton, like you need to use their client or selfhost their bridge. There is a lack of proper Linux support (their VPN does support Wiregard and Openvpn though). They add features that nobody asked for like Lumoai and the Crypto wallet, but it is included in your subscription so that is good.

Even a broken clock is right twice a day. Even the worst people on the planet can have some points that people can agree with even if they are "from the political opposite". Last time I checked the only way to get everybody to agree on political decisions is to make compromises. Not that you can do that with aseholes like Trump, but that's a different story.

I highly recommend Migadu, great value and performance, use it with own domains.

I use Tuta and it is ok for me, although I can understand @thesdev@feddit.org's points. For me, mail is a unwelcome necessity, but not something I use really for anything sensitive and my move to Tuta last year was more about finding an ethical alternative to Google.

As one other already mentioned, i would think about getting your own domain and using it with e.g. mailbox.org. That way you become less dependent on the provider, if you wanted to switch in the future.

I have been pretty happy with tutamail

I need to figure out how to setup custom domain on it inorder to move my own mails over, but haven't gotten around to it yet

Regarding Proton I'd also make use of Proton Bridge to have a local copy of your mails just in case something goes wrong.