If I can't call anyone because the contacts are not synced with iPhone, than keeping contacts @gmail, e-mail @protonmail and storrage @synology is a messy option.

CardDAV (as well as CalDAV) is a must!

And for real, contacts doesn't have to be encrypted.. we don't call NSA people or something.
Security is a great thing, to much security = lack of features/functionality = people don't switch.

Like in my organization, forcing users to have a complex password every 3months and guess what? Full of yellow post-it pinned all over the desks :)

I suspect that the encryption on the contacts would prevent a normal CardDAV implementation from being possible. What probably would work fine, and would solve the most common use case, would be to implement a (possibly bi-directional) syncing feature to the Android and iOS apps. That way, users could "push" their ProtonMail contacts into their phone's contact store.

With 3.12 we have a good contact manager, thanks a lot :D !
Know it just need a good sync ability for the app.
Maybe a way to replace standards contact phone manager by Protonmail ? Even with a separate app ?

This would be a wonderful feature! One of the things I'm still considering before really changing my email service.

Currently, "synchronization" of contacts can be partially done.

1) General: vCard import/export was recently implemented (with encrypted contacts for paid members).

2) Mobile: the app already pulls contacts from phone

3) Desktop: Protonmail-Bridge would allow usage with a third party client with synchronized contacts.

Providing a server (*and a client*) for carddav would make the synchronization more well integrated.

Wtih carddav *client*, one could sync it with e.g. nextcloud. One loses protonmail's encryption, but it is a nice feature, and the mobile app already pulls contacts from somewhere.

With carddav *server*, I agree with the comment of Bryce McNab: implement it nicely so that other software (such as android and thunderbird) can retrieve the data!

The ability for Protonmail on Android to synchronize contacts with the contacts saved on your Android device. The lack of contact syncing is one of the only things keeping me reliant on Google, and it would be nice to have a privacy friendly alternative in this area as well.

This would be great. But first contacts must contain at least phone number and email - if not full data (home, work, note, agreed password, etc).
When contacts contains phone number then it is up to ProtonMail to integrate contacts with android phone (or iPhone). Giving full featured solution (email calendar, contacts) is the way to go.

Based on Protonmails setup, I think it would be really cool if the current contacts feature on the android app would sync full vCards, and keep them encrypted on the servers. Then, it could use the built in API to expose the contacts to the phone, as DavDroid would using carddav.

I know the security/privacy issues of keeping unencrypted data on 3rd party (ProtonMail) servers. This way, it's encrypted with your mailbox as usual, and uses the app/website to view/decrypt and 'sync' with the local phone.

I'm not an expert on iOS but I imagine they have a similar function that allows 3rd party apps to use an internal API to expose contacts, but I may be wrong.

It will be a good idea to sync contact with Nextcloud.

my android phone communicates with my google contact list directly - my phone's "contacts" is literally just a display of my google contacts, updated in real time (i.e. i can change contact data via my browser, and when i whip out my phone updated information is reflected).

i'm not terribly tech savvy, but as SodaPhish mentioned this DOES seem like it would be a huge risk for compromise. i would have to integrate my pmail password with my android OS for it to access my contact list.

i'm spending one of my votes on this feature because i do think it would be extremely helpful, but i'm not holding my breath.

Contacts and calendar sync absence is what stops me from abandoning google's services. Adding these would be great and a big advantage.

any bleed-over to less secure platforms is how you erode the security of PM.

Gave 3 votes to this idea, which would almost complete the removal of dependency on Google (the final step is a calendaring solution).

For reference: Posteo already supports this (via CardDAV), as well as Calendar data too (CalDAV).

This. When it's comes to protecting privacy we often focus on the messages and ignore something as simple as our contacts list. It would be fantastic if ProtonMail could not only provide me access to my email on all my devices, but my contacts too. I would rather pay ProtonMail to sync my contacts between my Android Phone, Tablet and laptop than use other providers who wish to exploit my information.

client AND server would be most beneficial, allowing contacts to be either managed within protonmail or by a third service (owncloud/nextcloud, icloud, etc)

This can be done already. For instance, if you have gmail, you can go to https://contacts.google.com/
From there you can export an outlook contacts file. Then, ProtonMail has an option to import such a file. This is better than connecting to your account because it is more anonymous this way.

Please add the ability to sync with mobile contacts on mobile devices. This way we can use ProtonMail as our primary place to store and sync contacts with phone numbers as well as email address.

Yes, please add this feature! I would like to move all my stuff from Gmail to ProtonMail!

Please add this :-)

Having access to cardDAV (and calDAV) are my practical show-stoppers from switching to ProtonMail. I use google to manage my contacts, and then use cardDAV on all my devices. I live in two countries, and have two phones, multiple other devices, and I need some way of syncing all my contacts....

Would be perfect for Owncloud or Synology NAS completion.

Good sugestion, will be a very good enhancement.