FreeSWITCH

Input—per 1M tokens

Output—per 1M tokens

Context—tokens

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About

FreeSWITCH is ranked #3 of 20 in interactive voice response software on Inferse. It runs on API, Linux, macOS, Self-hosted, Windows. There is a free plan.

Compared on interactive voice response software

Free plan: Yessignalwire.com

Facts

Purpose: FreeSWITCH is an open-source framework for real-time voice and video that can route calls, bridge video, transcode media, and connect protocols.signalwire.com · 3 Oct 2026
Use cases: The maker describes FreeSWITCH as powering carriers, contact centers, and communication products.signalwire.com · 3 Oct 2026
License: FreeSWITCH is open source under the MPL license and can be run in production at no cost.signalwire.com · 3 Oct 2026
Downloads: A free SignalWire account is required to access FreeSWITCH packages and downloads.signalwire.com · 3 Oct 2026
Linux support: The getting-started guide documents installation on Debian and Ubuntu using SignalWire packages or a source build.developer.signalwire.com · 3 Oct 2026
Call control: The Event Socket exposes call control, channel management, and the internal event system over TCP to external processes.developer.signalwire.com · 3 Oct 2026
Integrations: FreeSWITCH documents integrations through HTTP backends, embedded Lua, Perl, Python, JavaScript and Java, and SignalWire connectivity.developer.signalwire.com · 3 Oct 2026
SignalWire connectivity: The mod_signalwire module connects FreeSWITCH to SignalWire for inbound and outbound PSTN calling over a persistent WebSocket session.developer.signalwire.com · 3 Oct 2026
Commercial modules: The commercial modules include answering machine detection and licensed G.729 Annex A encoding and decoding for transcoding.developer.signalwire.com · 3 Oct 2026
Support: The open-source edition has community support, while SignalWire offers commercial support, hardened builds, and priority patches through FreeSWITCH Pro.signalwire.com · 3 Oct 2026
Operational requirement: For self-hosting, the maker says teams should have dedicated resources to maintain on-premises infrastructure.signalwire.com · 3 Oct 2026
Security controls: FreeSWITCH supports named IP allow and deny network lists that can be used by SIP profiles and the Event Socket.developer.signalwire.com · 3 Oct 2026
Maintainer: SignalWire says it was founded by the original FreeSWITCH creators and is the project's primary maintainer.signalwire.com · 3 Oct 2026