Accurate voice data that powers agentic AI workflows at scale

AssemblyAI’s speech-to-text and speech understanding models are the market leader in accuracy, reliability, and performance — providing the outputs you need to accelerate growth and build enterprise-grade product experiences.

Trusted by top companies, backed by top investors

Accuracy that unlocks outcomes

We lead the industry not just in overall accuracy but in capturing the critical details needed to make speech data reliable, meaningful, and actionable—making us the preferred choice for end users.

More than accurate - it’s the industry preference

AssemblyAI

80%

Other

20%

Metric	AssemblyAI Universal	OpenAI Whisper	Microsoft Azure Batch v3.1	Deepgram Nova 2	Amazon Amazon Transcribe	Google Latest-long
Word accuracy rate	93.32%	91.67%	91.18%	90.76%	89.66%	85.16%
Proper nouns (Jaro-Winkler Error Rate)	13.87%	15.41%	26.84%	21.14%	37.57%	47.64%
Text formatting (Word Error Rate)	10.06%	12.01%	12.14%	12.39%	14.47%	25.45%
Alphanumerics (Word Error Rate)	4.00%	3.84%	5.19%	4.97%	6.24%	8.43%
Hallucinations	147.07%	404.59%	492.21%	523.13%	491.62%	328.97%

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Standout performance that drives tangible results

3x increase

in closed enterprise deals after launching Conversation Intelligence with AssemblyAI

15% higher

customer win rates after implementing AssesmblyAI

23% improvement

in call transcription accuracy and 2X increase in customer conversion rate

90% reduction

in customer complaints and support tickets

Comprehensive Speech AI capabilities with enterprise-grade infrastructure

Scale globally without hesitation

With low latency and fast turnaround times, you can feel confident that our models will scale to fit your needs.

Serving over 600M inference calls per month
Over 840M API calls per month
Over 40 terabytes of audio processed daily
99.9% uptime SLO and 24/7 coverage SLAs

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Keep security and compliance at the forefront

Our team is dedicated to supporting your security and compliance needs, including:

Uptime monitoring and vulnerability scans
Encryption in transit and at rest
SOC 2, ISO 27001, Business Associate Agreement for HIPPA, and PCI-DSS compliance
GDPR compliance and EU Data Residency

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Deploy flexibly and customize to fit your needs

From public cloud to multi-region to on-prem deployments, our team will work with you to find a solution that suits your organization’s specific needs.

The preferred Speech AI provider for customers across industries

AssemblyAI’s models enable clearer insights, faster workflows, and improved business outcomes for thousands of organizations across use cases and industries.

Conversation Intelligence

Capture the essence of every conversation with precision to power AI notetakers, revenue intelligence, customer insights workflows, and more.

Voice Agents

Convert live audio streams into text with high accuracy and low latency to enable agentic workflows and natural, high-quality customer interactions.

AssemblyAI Contact Center feature illustration

Contact Centers

Improve agent performance, and create better customer experiences by accurately capturing and surfacing insights from millions of conversations.

Medical

Manage post-visit followups, automate notes, and accurately capture doctor-paitent conversations with industry-leading accuracy.

Synthetic Training

Use AssemblyAI’s best-in-class models as a training source for your own AI models and capabilities to unlock faster innovation and breakthroughs.

Captioning

Automatically generate captions from video or audio in seconds, and redact sensitive, personal, or profane language to suit your specific needs.

Built with Enterprise needs in mind

Reduced rates and purchasing options through partners like AWS

Seamless integration with key partners including AWS, Twilio, Cloudflare, and Recall

Opt out of model training without incurring penalties or fees

Comprehensive data classification, retention, and deletion to ensure sensitive info stays secure

Faster processing, uncapped concurrency, and autoscaling

Early access to model improvements and new capabilities

24/7 support and dedicated solution architects

Go live in as little as 24 hours and scale to 100% in weeks

Industry-leading models to unlock breakthrough impact

Power stand-out experiences with the leader in Speech AI to elevate business insights, streamline tasks, and generate real revenue.

import assemblyai as aai

transcriber = aai.Transcriber()
transcript = transcriber.transcribe(URL, config)

print(transcript)

{
  "id": "6rlr37h8f4-e310-4e23-bbf3-ea5f347dc684",
  "language_code": "en_us",
  "status": "completed",
  "text": "Runner's knee is a condition characterized by pain behind or around the kneecap...",
  "confidence": 0.98122,
  "audio_duration": 3200,
  "words": [
    { "text": "Runner's", "start": 0, "end": 550, "speaker": "A", "confidence": 0.98113 },
    { "text": "knee", "start": 580, "end": 1130, "speaker": "A", "confidence": 0.95417 }
  ]
}