Methods, systems, and apparatuses, including computer programs encoded on computer-readable media, for receiving a first communication request, from a web browser of a first user. A request for information is sent, using a first active communication protocol, to the web browser. A first communication as part of the first conversation is received from the first user. A responder sends a communication to the first user. A first conversation identifier is identified and used to store the conversation of the first user. The responder sends a communication to a second user. A second active communication protocol is determined and used to send the communication. A second conversation identifier is identified and used to store the conversation of the second user.