Asterisk, FreeSWITCH, and jambonz vs Managed CPaaS: The 2026 Decision
Open-source voice stacks hand you the media server, the dialplan, the SIP trunk contracts, the STT/TTS plumbing, the PCI scope, and the on-call rota. Managed CPaaS hands you a bill. This post works the ownership list, the 2026 AI-voice inflection, the TCO math on both sides, and the middle path that keeps jambonz or FreeSWITCH as the media layer while a managed platform carries channels and agents.
- Asterisk
- FreeSWITCH
- jambonz
- open source
- CPaaS
- SIP trunking
- AI voice agents
- TCO
- 2026