Gladia is a speech-to-text and audio intelligence API for building voice products. It offers two transcription modes: an asynchronous endpoint for recordings and long-form audio or video, and a real-time WebSocket endpoint for live voice applications with sub-300 ms latency.

The underlying models are the Solaria family. Solaria-1 is positioned as a multilingual model covering a broad set of languages, and Solaria-3 improves accuracy on real English audio and on French, German, Spanish, and Italian, reporting 9.6% word error rate on English recordings.

On top of transcription, an audio intelligence layer enriches transcripts with LLM-powered analysis without calling a separate service. It plugs into the common voice-agent and telephony stacks and into no-code automation tools, and a desktop dictation app, GladiaFlow, uses the same real-time engine.

Features

Async transcription: REST endpoint for pre-recorded audio and video files
Real-time transcription: WebSocket streaming with sub-300 ms latency
Solaria models: Solaria-1 for broad multilingual coverage, Solaria-3 for English and major European languages
Diarization and language handling: speaker separation, automatic language detection, and code switching
Translation: translated transcripts alongside the source language
Audio intelligence: summarisation, chapterisation, sentiment and emotion analysis, named entity recognition, and PII redaction
Custom vocabulary and spelling: domain terms and preferred spellings applied at transcription time
Integrations: Pipecat, LiveKit, Vapi, Recall, Twilio, VideoSDK, Composio, Zapier, Make, and n8n
Developer tooling: official SDK, API reference, and an interactive playground

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