Alcatel-Lucent OpenTouch is ranked 7th in Unified Communications as a Service while Kamailio SIP Server is ranked 2nd in Unified Communications. Alcatel-Lucent OpenTouch is rated 0.0, while Kamailio SIP Server is rated 10.0. On the other hand, the top reviewer of Kamailio SIP Server writes "The server itself does load balancing however building a fail-over for it is difficult". Alcatel-Lucent OpenTouch is most compared with Alcatel-Lucent Rainbow, 3CX Live Chat and Digium Asterisk, whereas Kamailio SIP Server is most compared with Digium Asterisk, 3CX Live Chat, Cisco Jabber, Skype for Business and Genesys PureConnect.
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