I use Contacts+ (formerly FullContact): https://www.contactsplus.com/ https://www.contactsplus.com/ You can sign up for free and sync it with things like Twitt

I use Contacts+ (formerly FullContact): https://www.contactsplus.com/ https://www.contactsplus.com/ You can sign up for free and sync it with things like Twitter, GMail, Outlook, LinkedIn, etc. It's really nice and I've been using it happily for years. It helps with things like deduplication, keeping your contact info updated (it'll update contact records if people change their Twitter handle, etc.), and just all sorts of stuff.