AssemblyAI is a leading Voice AI platform that provides state-of-the-art models for transcription, speech understanding, and audio intelligence. Designed for developers, enterprises, and startups, AssemblyAI offers powerful APIs and tools to build industry-leading voice applications such as conversation intelligence, voice agents, medical transcription, and AI notetakers.
Its technology not only delivers highly accurate speech-to-text capabilities but also enables deep audio analysis with features like speaker diarization, sentiment detection, PII redaction, and multilingual transcription. With an emphasis on ease of use, scalability, and low latency, AssemblyAI empowers innovators to unlock the full potential of voice data.
The platform processes over 40 terabytes of audio daily, serving hundreds of millions of API calls per month, and is trusted by top-tier companies including Zoom. Whether for real-time voice workflows or batch transcription, AssemblyAI ensures your product is built on reliable, high-performing models.
Key Features
1. Speech-to-Text
Industry-leading accuracy for transcribing pre-recorded audio and video.
Automatically formats text and numbers for readability.
Multilingual support with automatic language detection.
Lowest Word Error Rate (WER) in the market.
2. Streaming Speech-to-Text
Ultra-low latency for real-time transcription.
High accuracy and precise end-of-turn detection.
Ideal for building real-time voice agents and live transcription services.
3.
Traffic Statistics
-0.7%vs Last Month
Category:computers electronics and technology > computers electronics and technology
Category:computers electronics and technology > computers electronics and technology
Monthly Visits
565.00K
Global Rank
#86,338
Country Rank (Brazil)
#20,402
Avg. Duration
2:44
Pages/Visit
3.36
Bounce Rate
38.8%
Category Rank
#344
Monthly Visits Trend
Traffic Sources
Direct55.5%
Search36.9%
Referrals5.7%
Social1.4%
Paid0.5%
Top Countries
#
Country
Share
1
Brazil
41.3%
2
India
7.7%
3
United States
6.7%
4
Italy
4.6%
5
NG
1.9%
Data from SimilarWeb • 12/2025
Speech Understanding
Speaker diarization for identifying who spoke and when.
Sentiment analysis to gauge tone and mood.
Topic and chapter detection for structured content segmentation.
PII redaction for compliance and privacy.
4. LLM Gateway & Guardrails
Connect speech data to large language models.
Built-in guardrails to prevent AI hallucinations and ensure factual outputs.
5. Scalability & Deployment Options
No throttles or contracts — pay only for usage.
Supports millions of hours of audio processing.
Self-hosted or cloud deployment.
6. Playground & Developer Resources
No-code playground to test models instantly.
Comprehensive API documentation, cookbooks, and benchmarks.
Use Cases
Conversation Intelligence
Organizations can build advanced conversation analytics tools to improve customer support, identify sales opportunities, and monitor call center performance. Features like sentiment analysis, chapter detection, and speaker identification provide actionable insights from every conversation.
Voice Agents
Leverage real-time streaming transcription and low-latency AI models to build natural, responsive voice assistants. From customer support bots to in-car assistants, AssemblyAI powers voice interfaces that feel intuitive and human.
Medical Transcription
Healthcare providers can automate transcription of consultations, ensuring accurate, secure records. PII redaction and speaker diarization help maintain compliance while capturing detailed multi-speaker medical discussions.
AI Notetakers
Applications can summarize meetings, generate structured notes, and highlight key topics automatically. AssemblyAI’s speech understanding transforms raw audio into actionable summaries.
Multilingual Transcription
Global businesses can transcribe and analyze conversations in multiple languages with automatic detection, enabling expansion into international markets without additional workflow complexity.
FAQ
Q: Who uses AssemblyAI?
A: Startups, enterprises, and technology companies — including Fortune 500 brands. Use cases span conversation intelligence platforms, meeting transcription tools, voice assistants, and more.
Q: Is AssemblyAI suitable for real-time applications?
A: Yes. The Streaming Speech-to-Text API delivers ultra-low latency transcription, ideal for live events, voice agents, and real-time analytics.
Q: Can AssemblyAI handle multiple languages?
A: Absolutely. The platform supports multilingual transcription with automatic language detection, ensuring accurate outputs regardless of the input language.
Q: How does AssemblyAI ensure privacy?
A: The platform offers PII redaction, secure hosting options, and complies with industry standards. It supports both cloud and self-hosted deployments to meet regulatory requirements.
Q: What makes AssemblyAI’s models industry-leading?
A: Industry’s lowest Word Error Rate, reduced hallucinations, and unbiased evaluations showing preference from 73% of end users.
Q: How do developers get started?
A: Developers can sign up for free, access comprehensive documentation, and experiment with the no-code playground before integrating APIs into their products.
Q: Does AssemblyAI scale?
A: Yes. The infrastructure handles hundreds of millions of API calls per month and processes large-scale datasets, making it ready for production workloads without throttling.
