i think there is a huge market for the following :

1. contact sync so we can use them from phone app , whatsupp etc..
2. similar to google keep
3. calendar
4. cloud storage for photos , files etc..

The possibility to use the protonmail contact database on iphone and therefore to be able to simply make calls will be a sine qua non condition for me to remain a customer

Contacts syncing (and as a bonus calendar management and sync) is what is making me stick to my current provider.

Please allow contacts to be synced between phones, tablets, and pcs.

I really want to be able to use my ProtonMail contacts as the canonical source. Many solutions here would be acceptable, such as a bidirectional (or unidirectional PM->Contacts.app) sync, or some (I know nothing about this) contacts API (which I don't know if exists).

Most everyday non techie users want their contacts to sync between their phones and ProtonMail. Just like how eteSync works.

Contact syncing is a must for practical reasons.

I do NOT want to sync any contacts and also be able to choose to block certain contacts and emails...that would be AWESOME!!

I would already be happy with just syncing names and phone numbers with my local address book. Data minimalism!

I understand why ProtonMail Devs are not for this and it is because they want to ensure our data is encrypted and secure weather its on their servers, in transit, and on our devices. Now if they allowed this features our contacts will not be encrypted on our phone making them vulnerable to other apps reading our contacts and if some customer used this feature and third party app got some contact info from their device which was also sycned with their protonmail account they may blame protonmail for failing to secure their contacts.

I think this feature still can be added it will be disabled by default and when enabled a warning message can appear warning the users that their contacts will sync to the phone address book but not be encrypted.

And for most people without this feature it kinda makes contacts useless. If I cannot sync my contacts to my phone so I know who is calling then I better stick with Etesync.

this would be nice indeed to have caldav and carddav

Annon just why have u been contacting my wife Cindy

Extremely important to be able to use the PM contact manager phone-wide or else sync it.

Please find a way to sync contacts with mobile devices. As said, this will break the Google link completely.

Perhaps ProtonMail could work together with the developer of EteSync (https://www.etesync.com/)? He already has achieved end-to-end encrypted synchronisation of _both_ contacts _and_ calendar data.

Synchronisation with Thunderbird is done via a similar idea to ProtonMail's IMAP bridge: a locally installed proxy (https://github.com/etesync/etesync-dav). It uses a locally installed CardDAV and CalDAV server (Radicale) with an EteSync storage plugin (https://github.com/etesync/radicale_storage_etesync).

Contacts are accessed in Thunderbird via the CardBook addon, a CardDAV based replacement for Thunderbird's own address book. Calendar data is accessed via CalDAV.

And for those using both ProtonMail and Gmail, CardBook can also synchronise with Google’s address book.

EteSync/EteSync-DAV, Radicale and CardBook are all open source.

Seems like all the hard work has already been done, so maybe the two sides should talk?

I've been using it for a few weeks and so far it works beautifully. It doesn't solve the problem of synced contacts in ProtonMail's web interface, but on Android and the desktop (Linux, macOS and Windows) it does. An iOS version is planned.

good to see that this is planned, im planning to become a paid user soon!

+1

I was going to switch to proton mail until I learned they don't have contact syncing. Import/export is not a practical solution at all. If I add a new contact on my phone, I want that information available in my email client.

This is a great idea. If protonmail had this, I'd switch over to it (the paid version) today.

> I suspect that the encryption on the contacts would prevent a normal CardDAV implementation from being possible.

Protonmail clearly doesn't use passwords to derive encryption keys for contacts (as they allow for password recovery), so they have the ability to encrypt/decrypt contacts on disk. A Carddav server would be technically feasible, and the spec is pretty straightforward.

JohnyD, protonmail users don't have friends or they use gmail for contact sync :))

seriously now, cardDAV is basic stuff these days, make it happen pls...
and for the 'encrypt everything' dudes, don't enable!