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

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
- Free, Pro, Enterprise
- 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.
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