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Quality score 81Bassemblyai.com#audio#business#coding#data#no-code

AssemblyAI: Speech AI and Audio Intelligence API

AssemblyAI provides speech recognition (ASR) and audio intelligence models for building voice AI applications. It supports multilingual transcription, voice agents, speaker diarization, and offers API and self-hosted options.

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About this tool

AssemblyAI is a voice AI platform for developers and enterprises, offering leading Speech AI models including ASR and Audio Intelligence to unlock insights from voice data and build new products.

Key Capabilities

  • Speech Recognition (ASR): High-accuracy transcription supporting 18 languages with the same accuracy across all of them.
  • Audio Intelligence: Extract insights from audio, including speaker diarization and other analysis capabilities.
  • Voice Agent API: Provides realtime transcription and speech foundation for voice agents.
  • Multilingual Support: Supports English, Spanish, French, German, Italian, Portuguese, and 18 languages total, with mid-sentence code-switching for bilingual conversations.

How to Use

  • Public API available for direct integration into existing products.
  • Self-hosted deployment supported.
  • No-code Playground available to test Voice AI models.
  • Freemium pricing model with a free starting point.

Use Cases

  • Transcribing audio
  • Multilingual transcription
  • Building voice agents
  • Audio intelligence insights
  • Speaker diarization AssemblyAI is suited for enterprises, developers, and voice AI teams that need high-accuracy transcription, multilingual support, and voice agent capabilities.
Best for
  • Enterprises needing high-accuracy transcription
  • Developers building voice AI applications
  • Voice AI teams requiring realtime transcription
  • Recruiting platforms where transcription accuracy is foundational
Use cases
  • Transcribing audio recordings
  • Multilingual transcription for global content
  • Building voice agents for customer interactions
  • Extracting audio intelligence insights
  • Speaker diarization for meetings and interviews
Strengths
  • High-accuracy ASR with 18 languages at full accuracy
  • Mid-sentence code-switching for bilingual conversations
  • Public API and self-hosted deployment options
  • Freemium pricing model with free starting point
  • No-code Playground for testing models
  • Voice Agent API for realtime transcription
Limitations
  • Freemium model may have usage limits or caps on free tier (specific caps not disclosed)
  • Self-hosting requires setup and infrastructure (details not provided)
  • API integration requires API key and developer effort (learning curve medium)

Features & use cases

Speech recognition (ASR) with high accuracyAudio intelligence for insightsVoice Agent API for realtime transcription18 languages supported with same accuracyMid-sentence code-switching for bilingual conversationsPublic API for integrationSelf-hosted deployment optionNo-code Playground for testing models

Quick facts

Public API available
Self-hosting supported

At a glance

Monetization
  • Freemium
Maturity signals
  • Public API
  • Model family
  • Self-hostable
Learning curve
  • Medium

Pricing

Pricing

Freemium

from

$4.50

Free plan included

Pricing verified Oct 21, 2026Official pricing page

Resources

Learn moredevelopers Documentation Everything you need to integrate, build, and ship with AssemblyAI — from API reference to step-by-step guides.

Sources

Every profile keeps its sources and latest verification date.
01https://www.assemblyai.com/products/voice-agent-api

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