While things like Jabber have an obvious alternative (i.e. Slack), who can compete with Cisco in terms of their desk phones and meeting room equipment? I only ask because their hardware is so ingrained in the company I work for that even if I were somehow able to convince everyone that Slack was worth switching for, who the hell else am I gonna get video conferencing equipment like this[0] from?
[0]http://www.cisco.com/c/en/us/products/collateral/collaborati...