real-time communication3 video chat2 webrtc2 audio call1 browser based1 chat automation1 click to call1 contact widget1 customer engagement1 customer support1 e2e1 group video call1 html51 instant query resolution1 live chat support1 live support1 lms integration1 no_plugin1 one-click call1 online meeting1 p2p call1 p2p video1 peer to peer1 screen sharing1 secure call1 secure video calls1 self hosted1 student interaction1 support system1 video call1