SailFin allows web developers to add click-to-dial buttons and build web conferencing, presence, and instant messaging applications. It also enables 3GPP and IMS network services developers to create services for call management, push-to-talk over cellular, interactive IPTV, and more. Additionally, SailFin can be used to create private SIP registration servers for call centers and customer service solutions to enable voice and video calls, presence, and instant messaging.