Consequently, I had the chance to conduct interviews with numerous CTOs from global companies and engage in discussions with various investors intrigued by the concept of an open-source Programmable Telecommunications stack.

Through these interviews, it became evident that we needed an innovative approach to developing a cloud-based stack for Programmable Telecommunications.

The question arises: Why did we need CPaaS in the first place? Crafting an application that leverages the existing Telecom network has always been challenging, particularly compared to building web-based applications. This difficulty stems from requiring a specific skill set that is both scarce and expensive to acquire. Let's be honest; delving into numerous RFCs to program a phone call is something nobody desires.

With the advent of the API era, along with UCaaS and CPaaS providers, it became a logical choice to use these providers. They allowed for deploying solutions within weeks instead of spending months on a simple use case.

However, traditional CPaaS solutions have their drawbacks. While they offer a quick go-to-market solution, they can be expensive and lack customization options. Some companies find themselves paying for features they don't need, while others face limitations due to privacy concerns and local regulations, especially in industries like healthcare.

Fonoster's primary innovation lies in developing a highly portable, cloud-based Programmable Telecommunications stack. This stack enables businesses to utilize APIs for tasks such as dialing, answering calls, establishing video sessions, and sending SMS, without concerns about what happens in the background.

The approach taken by Fonoster involves leveraging existing open-source solutions whenever possible and building proprietary solutions when necessary. These are integrated into a cohesive set of APIs resembling a traditional CPaaS.

For instance, initiating a Voice Application can be as simple as writing a JavaScript code, and making a call to the telephone network can be achieved using the SDK with a straightforward script.

To address diverse use cases, Fonoster offers Cloud Functions integration with OpenFaaS. This allows users to easily create and deploy applications, such as a reminders application, through simple steps and code.

Looking forward, it's recommended to explore "The essentials of building Voice Applications with Fonoster" to understand the available Programmable Voice features within Project Fonoster.