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Fonoster

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Open-source voice AI infrastructure for self-hosting phone numbers, IVRs and AI-driven calls.

Fonoster builds open-source voice AI infrastructure positioned as an alternative to Twilio. Its self-hosted VoIP stack handles outbound calls, including AI-agent-driven calls through Autopilot, inbound IVRs, phone numbers, trunks and recordings, all manageable via SDK and API. Developers build programmable voice applications with verbs like answer, gather, dial and record, using the NodeJS SDK. The project is led by Pedro Sanders and maintains an active open-source community.

STACK COVERAGE

Telephony & Transport

Open-source CPaaS

DETAILS

HQ COUNTRY

United States

FOUNDED

2018

LANGUAGES

English, Spanish

DEPLOYMENT

Self-hosted, Cloud, API

PRICING MODEL

Open source

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Fonoster

Telephony & Transport

Open-source voice AI infrastructure for self-hosting phone numbers, IVRs and AI-driven calls.

Open-sourceCPaaS

Layer: Telephony & Transport
Market: Global
HQ: United States
Founded: 2018
Deployment: Self-hosted, Cloud, API
Pricing: Open source
Languages: English, Spanish

Fonoster

Fonoster

ABOUT

STACK COVERAGE

DETAILS

Fonoster

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