The #1 Rated Speech-to-Text API

Automatically transcribe audio and video files. Powered by Deep Learning. Trusted by thousands of developers and startups.

Trusted by thousands of developers, startups, and Fortune 500 companies in production.

CUSTOMERS

See what developers are building with AssemblyAI's speech recognition API

Code samples

Easily convert audio and video to text with our simple Speech-to-Text API. Powered by advanced Deep Learning.

Features

Speaker Diarization

Know who spoke when

PII Redaction

Detect and remove credit card numbers, SSNs, and more

Automatic Transcription Highlights

Surface the most common keywords and phrases

99.9%+ Uptime

Trusted in production to handle millions of transcriptions each day

Model Customization

On-the-fly add keywords and phrases unique to your application or customers

Entity Detection

Detect things like names, injuries, and places spoken in the text

Advanced Security and Data Privacy Protocols

We never store your data, and follow strict security protocols within our systems

Why AssemblyAI

Fastest-improving Speech Recognition accuracy

Our research team deploys weekly accuracy improvements to our Speech Recognition models, and is constantly pushing the State of the Art.

In-house research team

We conduct our own research, and publish leading papers and blogs about the state of Automatic Speech Recognition.

99.9+ uptime

Our Speech-to-Text API operates with 99.9%+ uptime, and processes millions of audio file every single day.

More than Speech-to-Text

Top-rated Speech Recognition accuracy along with sentiment analysis, PII redaction, topic detection, summarization, and more.