There is a 3rd alternative...
Atolia, the one and only workspace your team needs
Atolia is a power-packed all-in-one digital workplace: Chat, Video calls, Tasks & Projects, Calendars, Documents, Notes...
Accelerate your team's collaboration game.
Implement it in minutes and save money. Atolia is cheaper than most of the business instant messaging apps.
Why choose ChatWork or Webex App?
Webex App is a communication tool targeted towards large organizations with a G2 score of 4.2/5 and an entry-level price of $12/user/month. It offers a free version, but no free trial. It has features such as chat, file sharing, groups/channels, voice and group video calls, screen sharing, and recording. It also offers breakout rooms, participant permissions, and translations/subtitles. Webex App lacks features such as mentions, threads, and whiteboarding. It has a newsfeed, "Do not disturb" mode, and help resources such as customer service, email, FAQ, forum, knowledge base, and chat. Webex App has a mobile and web app, desktop app, and allows for SAML/SSO authentication and two-factor authentication. It also offers integrations and APIs, but does not have an on-premise solution.