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Listed in Audio & Music with 179 other toolsPart of 4388+ curated AI tools on AISO
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AssemblyAI

Speech AI API — transcription, diarization, and audio intelligence for developers

★★★★½
4.7(1,842 reviews)
freemiumDR 78Free tier ($50 credit). Pay-as-you-go from $0.37/hr. Enterprise custom pricingView full pricing →

Visit AssemblyAI

www.assemblyai.com
💰 View Detailed Pricing →Try AssemblyAI →

About AssemblyAI

AssemblyAI is the leading speech AI platform for developers, providing accurate speech-to-text transcription, speaker diarization, sentiment analysis, topic detection, and PII redaction via a simple API. Used by thousands of companies — from startups to Fortune 500s — to build voice-powered products, transcribe meetings, analyze calls, and extract insights from audio at scale. AssemblyAI's Universal-2 model achieves industry-leading accuracy across accents and audio conditions.

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Studio-grade AI voices and speech-to-text — the voice layer most teams pair with tools like this.

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Key Features

✓Universal-2 transcription model
✓Speaker diarization
✓Sentiment analysis
✓Topic detection
✓PII redaction
✓Auto chapters
✓Content moderation
✓Real-time streaming
✓100+ language support

AssemblyAI Pros & Cons

✅ Pros

  • +Industry-leading accuracy (outperforms Whisper on benchmarks)
  • +Rich audio intelligence beyond transcription
  • +Simple REST API — integrate in minutes
  • +Generous free tier for testing
  • +Real-time streaming for live applications

⚠️ Cons

  • −Pay-as-you-go can get expensive at high volume
  • −No free GUI — developer-focused tool
  • −Requires coding knowledge to integrate
  • −Some niche accents still less accurate than standard English

Who Is AssemblyAI Best For?

👤Developers building voice-powered apps
👤Call analytics and revenue intelligence platforms
👤Podcast and media companies automating transcription
👤Healthcare and legal companies needing accurate records

Tags

speech-to-textapitranscriptionaudiodeveloper-toolsainlp
💡

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Alternatives to AssemblyAI

View all AssemblyAI alternatives →

Deepgram

Enterprise speech-to-text API with audio intelligence

freemiumCompare AssemblyAI vs Deepgram →

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Developer & Agent Access

How AI agents and developers can connect to AssemblyAI. Verified 2026-06-21.

Public API

✓ Yes · View API docs →

MCP Server

✓ Community server

Auth

API key