VoiceRun raises $5.5M to build a voice agent factory

VoiceRun announced on Wednesday that it has raised a $5.5 million seed round led by Flybridge Capital. The funding will support the company’s platform, which allows developers to launch and scale voice agents using code. Founded last year by CEO Nicholas Leonard and CTO Derek Caneja, the startup aims to provide an alternative for developers and enterprises seeking more control over voice automation. Leonard stated that he and Caneja realized developers and enterprises needed an alternative, which inspired them to build the platform.

According to Leonard, VoiceRun positions itself between two distinct segments of the voice automation market:

• No-code voice builders: Platforms such as Bland and Retell AI that allow building software without writing code, which are often used to build quick demos.
• Developer infrastructure tools: Sophisticated tools like LiveKit and Pipecat that provide developers with maximum control.

Leonard and Caneja started the company after realizing that many existing voice agents suffered from design flaws. While visual interfaces allow users to build agents by clicking through conversation flows and writing prompts in boxes, they offer limited configuration options. Leonard noted that there is a long tail of millions of small tasks that visual interfaces do not support, whereas writing code makes these tasks simple to implement.

The platform provides global voice infrastructure and an evaluation-driven lifecycle, while keeping ownership of business logic code and data in the customers’ hands. VoiceRun is designed for developers to supervise coding agents—which are AI agents that write, validate, and optimize code. Leonard explained that coding agents will perform much better when operating in code rather than in a visual interface. The platform allows developers to supervise these agents as they write code, run tests, deploy, and propose improvements.

This approach aims to address widespread dissatisfaction with automated voice systems. A survey from customer service software company Five9 last year showed that three-fourths of respondents still prefer talking to a human for customer service. Leonard noted that customers often feel relief when a human answers because voice automation has historically been brittle and ineffective. However, he argued that human agents have their own limitations, such as language barriers or making customers feel judged.

Leonard compared the current state of the market to the automotive industry before the Model T, noting that while great cars existed, vehicles did not become ubiquitous until the assembly line was introduced. “There are great voice agents today, but they won’t be ubiquitous until the voice agent factory is built. VoiceRun is that factory,” said Leonard.

Why it matters

VoiceRun is positioning its platform as a middle-ground solution for developers, aiming to bridge the gap between simple no-code voice agent builders and complex, high-control infrastructure tools. By focusing on a code-first approach, the company aims to make voice automation more reliable and customizable for enterprise applications.