BusyContacts is described as 'The most powerful contact manager for macOS' and is an app in the Office & Productivity category. There are more than 10 alternatives to BusyContacts for a variety of platforms, including Mac, Online / Web-based, iPhone, iPad and Android. The best alternative is Google Contacts, which is free. Other great apps like BusyContacts are EteSync (Paid, Open Source), Contacts+ (Freemium), Monica (Freemium, Open Source) and Contacts (Paid).
Google Contacts is Google's contact management tool that is available in its free email service Gmail, as a standalone service, and as a part of Google's business-oriented suite of web apps Google Apps.
Contacts is a flexible and convenient place to store information for everyone you know. It’s easy to import names, numbers, addresses, and photos from Facebook, LinkedIn, Google, and even Microsoft Exchange.
Dex is a personal CRM designed to be much easier than a sales CRM. Dex reminds you to keep in touch with the people you care about. Easily visualize, understand, and manage all your relationships for free.
Cisdem ContactsMate can analyze, report, fix dozens of problems with OS X Contacts and export Mac Address Book to some formats for backup or sync. It also can make groups for contacts, batch fixes similar problematic contacts, manually set suffix.
Contact is a free and low size app for contacts sharing. It simplifies sharing and receiving contact information, helps to easily merge contacts, allows to call directly from app, has user friendly interface, and does not need internet connection to work.
ContactBase is a visual address book app that manages and organises your business contacts. It helps you to understand hierarchies and navigate the politics of complicated negotiations to gain the upper hand.