Slack, Discord, Rocket.Chat, Mattermost, Matrix.org, Threema, Cisco Jabber, Zulip, Keybase, Conversations, Milo, Pumble, Microsoft Kaizala, Kahla, Kandan, ChatWork, HeySpace, Hubgets, Alterdesk, Voiswave, FASTEE, Engagedots, articlebox, MainFrame, Vistasuite, ScudCloud, Shasper, collAnon, Minty Chat, Mazey, Zapty, Modular.im, 9mCollab are some alternatives to Zoho Cliq.