Messaging companies

Facebook is a company providing an online social networking service.

Slack Technologies is a company developing collaboration software.

Twitter is a company that provides a social networking platform.

Zoom Video Communications is a company operating a video conferencing platform that unifies cloud video conferencing, online meetings, and group messaging.

RingCentral is a provider of cloud computing based phone systems to help small businesses manage mobile, fax, and email communications.

Pinterest is a company that develops a social networking site for saving and discovering creative ideas.

Mail.ru Group is a company that offers a variety of online communication products, entertainment, and e-commerce services.

Avaya is a company providing contact center, unified communications, and networking products and services.

Mitel (also known as Mitel Networks) is a company providing business communications and collaboration products.

Sprout Social is a company developing social media management solutions.

Vonage is a cloud communications provider.

LivePerson is a technology company that develops products for online messaging, marketing, and analytics.