Do you have a problem with syncing your contacts?

I don't have this problem as I use Google/Android (which has built in sync) but I've seen many companies attempt this. The fatal flaw in all of their products is that contact sync is not something you use very frequently so people are not willing to pay for it on its own. You need to bundle it with something else to increase the frequency of utility. The other challenge is that it is likely Google et all will add this as free features to their apps. You need to be ready for commoditization.

A2A. I don't try to sync into a one common place. The way I communicate with anyone, their contact info is already available on that platform. Example: gmail, fb, li, quora, etc.. This is just me, I probably am not your ideal target.

I used to think this was a critical feature, but now the key mobile platforms (iOS and Android) do a merge of multiple contact lists on the client using phone numbers and email addresses as the unique keys, showing them as "linked" contacts. Occasionally this means there's a problem with duplicates, but not often enough that it's a real problem.

Contact management is a problem. Instead of working users find they are managing the CMS. Many companies are solving this problem. What will you do differently?

I don't have a major problem. Sometimes I used to get duplicates, but that seems to have stopped. A way of synching with gmail would be good though ;)

Yes, this would be very useful to me.  I was a user of a popular system that is no longer viable and used it from about 2002/3 time frame until a couple of years back.  It was nightmare when a technical glitch on their end would totally mess-up my contacts.  This was a big issue for me as back then I had close to 10,000 people in my files.  I'm not clear about the technical challenges of keeping contacts in sync but a poor-man's approach that seems to work for me is by using multiple accounts from within the contacts app on the device.  I have consolidated contacts apps on my Mac, my iOS and Android devices.  Yes, there is overlap and some duplication but I can manage. What is hard is determining which phone number or email is 'current' - particularly phone numbers! My opinion is that people such as me who have 10,000 contacts should be using a CRM system more so than a sync system for contacts.  Secondly, it's more important to me that my contacts are up-to-date which is a challenge that syncing doesn't solve - sync systems make it harder actually - with duplicate data elements an automated system will have difficulty deciding obsolescence.  Then there's the issue with legitimate duplicates - multiple Bob Smiths for example.

I have some minor frustrations with my contacts, but none that are so great to subscribe to any monthly/annual solutions that may be out there. What I want is a selective contact syncing between iCloud, Google, Facebook & LinkedIn. 1.  It needs to be selective because I don't need to have every person that I have ever emailed in my address book. 2.  The selective sync should be two ways - if I put a new user into a certain group in Gmail - it should automatically push to my iCloud account.  If I add someone to iCloud, it should automatically push to my Gmail account. 3.  I'd like selective supplemental information added from Facebook & LinkedIn.  I don't want Facebook or LinkedIn overwriting certain fields.  Nor do I want them adding a bunch of information that I don't care about.  But I'd like to be able to add certain fields if they happen to be available.

Definitely a problem worth solving. Especially if you implement zero-hassle account migration as part of it. So many people would love to abandon their AOL or Yahoo accounts but don't know how and afraid of becoming lost to their contacts. Your service could completely automate rerouting and notifications of senders.

Yes its a problem but it would take a lot for me or anyone to trust a third party and authenticate all those services for you.