FreeSWITCH

Facts

License MPL 1.1 (custom license) Not a standard license, so GitHub's license summaries don't cover it. Read the project's license text before relying on it.

Paid-feature tier C Tier CDaily-workflow features need a paid edition

Self-host Self-hostable: yesYou can run it on your own server.

Paid-feature limits2 noted

• Commercial mod_com_amd answering-machine detection requires per-channel licences; module is outside the public source tree.
• Commercial mod_com_g729 G.729A encoding/decoding requires per-channel licences; passthrough is distinct from transcoding.

Tier C: Core public source is OSI MPL-1.1 per current HEAD LICENSE, with additional component notices. Tier C reflects same-vendor paid ordinary voice functionality in separately distributed proprietary AMD and G.729 modules, not carrier/service charges. Advantage/Pro builds and support are commercial offerings. First-party SignalWire Platform adds private modules and managed APIs; hostedOffer does not imply application or source parity. Marketing license card differs from repository LICENSE; source evidence controls this record. License source. Repository: signalwire/freeswitch. Self-host: server; hosted offer from the project: yes.