Vapi and Speechmatics: Build agents that understand every voice

Speechmatics is now natively available on Vapi, the developer platform for building production-ready voice AI agents. 

With Vapi, you can orchestrate everything your agent needs through its easy-to-use visual interface, or drop into developer tools and a command-line interface when you want more control. 

Pair that orchestration with Speechmatics’ industry-leading speech recognition and your agents gain the strongest possible input layer, the ears they rely on to make sense of the world.

Why builders choose Speechmatics on Vapi

Voice agents that work in the wild rely on three main components: precision in noise, languages that scale, and domain awareness.

Here is how we deliver each.

Precision built for the real world

Accents, fast talkers, background noise. Real conversations are messy. Most ASR systems shine on clean lab audio, then fall short when deployed. 

Speechmatics is different. Our models are engineered for robustness in everyday conditions, delivering transcripts you can trust, no matter the environment, use case, or language. 

With Speechmatics as the transcriber inside Vapi, your agents gain a real-time input layer that is accurate, low latency, and built to handle the messy reality of human conversations. 

From accents and fast talkers to background noise, Speechmatics ensures your agents do not just hear, they truly understand.

Languages that scale with you

Voice AI cannot scale on English alone.

The real growth lies in markets across Asia, the Middle East, Europe, and Latin America, where most systems still struggle. 

Limited labeled training data means other ASR providers mishear accents, skip words, or fail entirely. 

Speechmatics has solved this differently by developing high-quality language models even in low-resource conditions. It is all part of our mission to understand every voice. 

Today, we deliver consistently high accuracy across 55+ languages, setting the benchmark for truly global voice AI.

The best ears in AI and beyond

Every business speaks its own language, from product names and acronyms to customer details and technical jargon. If your agent misses them, the experience breaks. That is why Speechmatics offers:

• Custom Dictionary: teach up to 1,000 terms with sounds-like hints so critical words land

• Speaker Diarization: separate who said what in multi-party conversations so downstream tools keep context.

Together, these capabilities give the Vapi community a sharper, more adaptable foundation, because smarter agents start with smart listening.

Meet us at VapiCon 2025

Speechmatics will be demoing the new Vapi integration live at VapiCon, their first-ever Voice AI Summit. 

As a Platinum Sponsor, you’ll find us on Floor 5 at Booth #2, where we will run live demos, host head-to-head challenges, and give every booth visitor $200 in free Speechmatics credits.

Our CSO, Ricardo Herreros-Symons, will also be on stage for the panel talk: “Frontier Speech Models: Breakthroughs in the Speech Model Training World.” He’ll be joining founders and experts pushing the boundaries of how speech models are trained, scaled, and deployed.

It is the perfect chance to see what is possible when Vapi orchestration meets Speechmatics accuracy.