Fonoster
An open-source programmable telecommunications stack for building voice applications and PBX functionalities.
What is Fonoster?
Fonoster is an open-source programmable telecommunications stack that allows developers to build and deploy voice applications and PBX functionalities. It connects telephony services with the Internet, providing an API-first platform for creating call flows, handling DTMF, speech recognition, and call routing. It solves the problem of vendor lock-in and high costs associated with proprietary cloud telephony services.
Developers and businesses needing programmable voice features, such as building IVR systems, call centers, automated voice assistants, or custom PBX solutions without relying on closed commercial platforms.
Fonoster offers a self-hosted, open-source alternative to Twilio, giving full control over telephony infrastructure, reduced costs, and flexibility to customize voice applications. Its API-first design and modern security features make it ideal for integrating telephony into existing applications.
Overview
🚀 The open-source alternative to Twilio.
Use Cases
Best For
- Building interactive voice response (IVR) systems
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