Voice Agent API

Build responsive AI voice agents with sub-second, speaker-aware STT/TTS across 55+ languages.

by Speechmatics · Voice & Call Center

Executive Summary

Speechmatics' Voice Agent API, also known as Flow, is a powerful solution designed for developers and businesses to build highly responsive and intelligent AI voice agents. It offers sub-second, speaker-aware Speech-to-Text (STT) and high-quality Text-to-Speech (TTS) capabilities across more than 55 languages, enabling real-time, natural speech-to-speech interactions. The API provides flexible deployment options, including a managed SaaS platform or self-hosting, and integrates seamlessly via its robust API and SDKs. It is built with enterprise-grade security and compliance, adhering to standards like ISO/IEC 27001:2022, GDPR, SOC 2, and HIPAA, ensuring data privacy and secure operations for critical applications in sectors like contact centers and healthcare.

Use Cases

  • Medical & Healthcare
  • Contact Center Solutions
  • AI Assistants and Agents

Features

Intelligence

  • Real-time Speech-to-Text: Transcribes live audio into text with sub-second latency.
  • Speaker Diarization: Identifies and separates different speakers in a conversation.
  • High-Quality Text-to-Speech: Generates human-like voices from text across 55+ languages.
  • Multilingual Support: Supports 55+ languages for both STT and TTS.
  • Advanced Analytics: Provides detailed insights into speech interactions.

Visibility

  • Speech Analytics Dashboard: Provides a comprehensive view of speech interaction data, performance metrics, and compliance insights.

Technical Specifications

Deployment
Hybrid
Authentication
API Key
API Available
Yes

Integrations

  • Pipecat

Security & Compliance

Certifications: ISO/IEC 27001:2022, GDPR, SOC 2, HIPAA

Encryption: Bank-grade encryption, including encryption at rest and in transit.

Pricing

Model
Scalable pricing
Starting Price
Try Flow free for up to 50 hours per month
Target Customer
SMB,Mid-Market,Enterprise
Free Trial
Yes, 50 hours per month

About Speechmatics

Speechmatics is a Voice AI company that builds infrastructure to understand every voice. They provide multilingual speech-to-text, text-to-speech, and voice AI technology for enterprises, developers, and platform partners. Their products help organizations in various sectors to turn voice into actionable insights through transcription, translation, and summarization.

Founded: 2006 · Headquarters: Cambridge, United Kingdom · Employees: 51-200 · Private