New Universal-3.5 Pro is here. Learn more: Async Realtime

platform

Platform overview

Models, APIs, and infrastructure in one place. Build voice into any product, on any stack.

products

Pre-recorded Speech-to-Text API Realtime Speech-to-Text API Speech Understanding API Voice Agent API Guardrails LLM Gateway

deployments

Self-Hosted Voice AI Cloud

use cases

AI Scribes AI Notetakers Agent Assist Call Analytics Conversation Intelligence Medical Transcription Voice Agents

customers

All customer stories

Top Voice AI companies are building with Assembly.

See all stories

Zoom leverages AssemblyAI to help advance its AI research and development.

Siro achieves a 90% reduction in customer complaints and support tickets.

Watch the video

resources

Documentation API Reference Cookbooks Support Changelog Status

Latest Release

Universal 3.5 Pro

Our new flagship speech-to-text model handles real-world audio the way it actually happens. Available for real-time and pre-recorded audio.

Realtime Pre-recorded

resources

Blog Partners Research Benchmarks Security

platform

Platform overview

Models, APIs, and infrastructure in one place. Build voice into any product, on any stack.

products

Pre-recorded Speech-to-Text API Realtime Speech-to-Text API Speech Understanding API Voice Agent API Guardrails LLM Gateway

deployments

Self-Hosted Voice AI Cloud

use cases

AI Scribes AI Notetakers Agent Assist Call Analytics Conversation Intelligence Medical Transcription Voice Agents

customers

All customer stories

Top Voice AI companies are building with Assembly.

See all stories

Zoom leverages AssemblyAI to help advance its AI research and development.

Siro achieves a 90% reduction in customer complaints and support tickets.

Watch the video

resources

Documentation API Reference Cookbooks Support Changelog Status

Latest Release

Universal 3.5 Pro

Our new flagship speech-to-text model handles real-world audio the way it actually happens. Available for real-time and pre-recorded audio.

Realtime Pre-recorded

resources

Blog Partners Research Benchmarks Security

Chat with our support assistant

Ask Joey anything about AssemblyAI — API usage, error codes, pricing, or how to integrate. For account changes, please email support.

1B+

Audio files processed

99.9%

Uptime

400k+

Developers building

J

Joey

AssemblyAI Support

Hi! I'm Joey, AssemblyAI's support assistant. Ask me anything about our APIs, pricing, or how to integrate — I'll search our docs and get back to you. For account-specific changes I'll point you to the right place.

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Metaview

Dovetail

Calabrio

Cluely

Genio

Commure

Retell

LiveKit

Tolan

ClickUp

HeyGen