Soniox

Soniox is a real-time voice AI platform that provides speech-to-text, text-to-speech, and speech translation capabilities across 60+ languages. Built for developers and enterprises, the platform powers both a consumer app for individuals and teams, and production-ready APIs for building voice-enabled applications. Soniox is trusted by leading companies including Perplexity, Samsung, LG, Krisp, Fireflies, and TrueCaller for handling mission-critical voice workloads.

Core Features

The Speech-to-Text API delivers native-speaker accuracy across 60+ languages with sub-200ms latency, enabling real-time transcription without waiting for sentence completion. It excels at handling real-world speech challenges: multiple speakers, mixed languages, overlapping conversations, alphanumerics, foreign names, and high-noise environments. The platform automatically detects speaker changes, allowing transcripts to clearly attribute who said what, even in fast-paced discussions.

The Text-to-Speech API generates high-fidelity, hallucination-free speech in 60+ languages with precise handling of alphanumerics, borrowed words, foreign names, and mid-sentence language switching. Ultra-low-latency streaming enables audio generation to start from the first few words, before sentences complete—critical for responsive voice agent interactions.

The Speech Translation API translates spoken content in real-time across 3,600 language pairs with context-aware accuracy. It handles code-switching environments where speakers naturally switch languages mid-sentence, making it ideal for global conversations and multilingual communication scenarios.

Key Technical Capabilities

Soniox is engineered specifically for multilingual complexity rather than English-first with add-ons. It supports seamless language switching without manual language selection, speaker separation for multi-speaker conversations, and domain-specific vocabulary handling. All processing happens in real-time with data residency options for regions requiring local data processing and regulatory compliance.

Use Cases

For voice agents and conversational AI, the platform powers responsive, human-like interactions with accurate speech recognition and natural speech generation. Wearable devices benefit from streaming recognition with minimal delay and low bandwidth requirements. Meeting and call center applications use real-time transcription and translation to enable live captions and multilingual customer interactions. Medical and legal transcription leverage high accuracy for specialized terminology and compliance requirements. Dictation and voice typing tools turn speech into clean, formatted text for messages and documents. Speech translation products enable real-time voice-to-voice translation across languages.

Privacy and Compliance

Soniox prioritizes privacy with audio never stored to disk—everything processes in real-time memory. The platform maintains SOC 2 Type 2, ISO/IEC 27001:2022, HIPAA, and GDPR compliance, making it suitable for healthcare, financial services, and regulated industries where speech data sensitivity is critical.

Deployment Options

Available as both a standalone app and developer API, Soniox serves individuals needing transcription and translation tools, and enterprises building custom voice-powered applications requiring enterprise-grade infrastructure and support.