AssemblyAI

High-accuracy Speech-to-Text (streaming & batch)

Transcribe calls, meetings, podcasts, and media with models trained on massive multilingual datasets. Use real-time streaming for live captioning and voice features, or asynchronous jobs for long files. The API handles accents, noise, and domain shifts while returning timestamps and confidence scores. Universal-2 and future releases raise accuracy out of the box, so teams ship reliable transcripts without maintaining decoders, lexicons, or bespoke pipelines.

Audio Intelligence: structure & insight

Go beyond raw text with speaker diarization, summarization, sentiment, topics, entities, chapter detection, and content moderation. Automatically label who said what, extract key moments, and flag sensitive content. PII redaction helps protect privacy by masking names, emails, and numbers in transcripts and audio. These models transform hours of recordings into compact summaries and searchable metadata that drive workflows, discovery, and downstream analytics across teams.

Simple API, SDKs, and docs

Start fast with a clean REST API, WebSocket streaming, and SDKs for popular languages. Upload via URL or direct file, poll for results or use webhooks, and compose multiple models in one request. Clear examples, quickstarts, and troubleshooting guides shorten integration time for teams building voice features into apps, backends, or data pipelines. From prototypes to high-volume workloads, the developer experience stays approachable, predictable, and well supported.

Production-grade security and reliability

Operate with confidence on a platform designed for privacy and uptime. Data is encrypted in transit and at rest, with optional PII redaction, retention controls, and auditability. SLAs, a public status page, and enterprise support help teams meet compliance needs across regulated industries. The service scales to large volumes and long files, with regional hosting options, and the roadmap delivers steady accuracy and latency improvements without disruptive API changes.

Ecosystem integrations and flexibility

Use AssemblyAI where you work—call the API directly, run through cloud marketplaces, or connect via partner integrations and connectors. Combine Speech-to-Text with Audio Intelligence in one pass, or feed transcripts to downstream LLMs for retrieval, training data, and generation. The modular approach lets teams mix models per use case while avoiding lock-in, so upgrades to newer releases improve results without rearchitecting pipelines or rewriting code across services.