Same $19 entry price, different contents. Zendesk's $19 Support Team plan is email ticketing only, where LiveAgent's $19 Small business plan carries chat buttons and the built-in call centre. Zendesk also meters AI at $1.50 per automated resolution; LiveAgent publishes no AI meter at all.
The closest like-for-like suite: seat-priced ticketing plus chat, social and voice from a low entry tier. Freshdesk caps its free plan at 10 agents where LiveAgent's free plan takes unlimited users and constrains history instead.
Suite competitor at a comparable price that does publish a cheaper non-full seat ($6/mo light agent). LiveAgent publishes no light, viewer or collaborator class, so occasional contributors cost a full agent seat here.
A simpler shared-inbox product rather than a channel-for-channel match, but it is the other vendor with a published light user ($10/mo). For a team with many occasional contributors that seat class is the deciding cost difference.
6 of 9 not published by LiveAgent, checked