What is FreeSWITCH and how is it different from Asterisk?

Both FreeSWITCH and Asterisk are open-source telephony frameworks for SIP calling, IVR, call routing, and media processing. Asterisk uses a thread-per-call model, while FreeSWITCH Solutions use an event-driven architecture that efficiently handles thousands of concurrent sessions. For smaller deployments, either platform works well, but businesses needing high scalability often choose a FreeSWITCH Telecom Solution.