What is AssemblyAI?
AssemblyAI provides advanced Speech AI models that transform raw voice data into accurate text and actionable insights, empowering developers and enterprises to build world-class, voice-powered applications. It addresses the critical need for reliable, high-quality speech processing to unlock the full potential of audio content, whether live or pre-recorded.
Key Features
🔬 Universal Speech-to-Text: Achieve unmatched accuracy in converting spoken language to text across over 99 languages. Leveraging a state-of-the-art multilingual model, it ensures precise transcription of alphanumerics, proper nouns, and complex terminology, delivering the industry's lowest Word Error Rate (WER) for reliable source data.
⚡ Streaming Speech-to-Text: Power real-time voice experiences with ultra-low latency (300ms P50) and exceptional accuracy. This capability includes intelligent turn detection for smoother conversational flows, ensuring agents respond with precise timing and without awkward interruptions.
🧠 Speech Understanding (Audio Intelligence & LeMUR): Move beyond transcription to extract deep meaning from voice data.
Audio Intelligence offers AI models for summarization, sentiment analysis, entity detection, PII redaction, content moderation, and topic detection.
LeMUR (Large Language Models Unified with Retrieval) integrates LLMs with your audio transcripts, enabling you to ask questions, generate summaries, extract data, and create content directly from spoken information through a single API.
🛠️ Developer-First API & Scalability: Designed for seamless integration, AssemblyAI offers robust SDKs, comprehensive documentation, and a scalable API that handles over 600 million inference calls and 3.5 million audio files daily. This ensures your applications can grow effortlessly from initial development to enterprise-level deployment.
Use Cases
Enhance Voice Agents: Implement real-time, highly accurate streaming speech-to-text to power human-like voice agents, enabling smoother conversations, improved task completion, and instantaneous responsiveness for customer service or virtual assistants.
Drive Conversational Intelligence: Analyze customer interactions and sales calls with deep audio intelligence. Automatically summarize key points, detect sentiment, identify entities, and redact sensitive information to gain unmatched insights, streamline workflows, and accelerate market strategies.
Automate Content Analysis & Generation: Transform audio and video content into valuable assets. Automatically generate summaries of meetings, extract key phrases, categorize topics, or even use LeMUR to generate long-form written content directly from spoken input, significantly reducing manual effort.
Unique Advantages
AssemblyAI stands apart by delivering superior performance and tangible outcomes, as evidenced by:
Industry-Leading Accuracy: Our Universal model boasts over 93.3% accuracy and up to 30% fewer hallucinations than other providers, preferred by 73% of end-users in unbiased evaluations. This precision is critical for reliable data.
Unrivaled Streaming Performance: The Universal-Streaming model achieves almost 2x faster P99 latencies compared to competitors like Deepgram Nova-3, alongside significant accuracy improvements (12% overall, 21% fewer alphanumeric errors, 5% better proper noun recognition).
Deep Insight Extraction: Beyond transcription, AssemblyAI's Audio Intelligence and LeMUR capabilities enable comprehensive understanding, allowing you to extract nuanced insights, generate summaries, and leverage LLMs directly from voice data without chaining multiple technologies.
Proven Business Impact: Customers report substantial gains, including a 3x increase in closed enterprise deals, 15% higher customer win rates, and a 90% reduction in customer complaints and support tickets after implementing AssemblyAI solutions.
Conclusion
AssemblyAI provides a robust and continuously evolving Speech AI foundation, empowering you to convert voice data into unparalleled product experiences and actionable intelligence. By building on our industry-leading models, you gain the accuracy, speed, and depth needed to innovate confidently and scale effortlessly.
Explore how AssemblyAI can transform your voice data into powerful outcomes.
More information on AssemblyAI
Top 5 Countries
27.13%
9.3%
8.29%
3.63%
3.41%
Brazil
United States
India
France
Italy
Traffic Sources
1.9%
0.47%
0.08%
6.28%
40.57%
50.71%
social
paidReferrals
mail
referrals
search
direct
Source: Similarweb (Sep 24, 2025)
AssemblyAI was manually vetted by our editorial team and was first featured on 2023-03-07.
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