Kayako a customer service platform that helps businesses connect with their customers and deliver a better customer support experience over the web, email, live chat and phone. Kayako is available in the cloud and on-premise.
It builds a multi-channel helpdesk integrated with e-commerce merchants' back-office. It allows merchants to manage all their support from one place. It connects all business apps and all communication channels to provide support agents a unified view of their customers.
elevio is a proactive support widget you embed on your site in minutes, that provides your users with contextual support where and when it's needed most. It can integrate with third party support systems like Zendesk, Freshdesk, Olark, etc
Desk.com lets you see all your customers in one place and engage them across all your support channels (Twitter, Facebook, phone, email, chat and discussion boards) in one easy-to-use desktop. Be there for your customers — anytime, anywhere.
It claims to be a modern multichannel customer support platform. Core features include live chat tool and cobrowsing that adds a personal touch to your service. It’s easy to install and use and has useful features like proactive chat invitations, real-time visitor list, typing insights, saved replies and more. The design can be customized as per your business needs.