High-accuracy transcription API supporting 99+ languages and real-time processing.
AssemblyAI is purpose-built for developers who need robust, accurate, and scalable voice intelligence in their applications. As highlighted on its website, the platform addresses the critical “garbage in, garbage out” problem by delivering transcription models that outperform competitors in real-world conditions—especially in noisy environments, overlapping speech, or domain-specific jargon. This accuracy forms the foundation for higher-level features like Conversation Intelligence, which extracts topics, sentiment, and action items from meetings or support calls.
The platform’s architecture is designed for massive scale: it supports millions of hours of audio without contracts or usage caps, making it ideal for startups and Fortune 500 companies alike. Verified customer results include 2x higher customer conversion rates, reduced support tickets, and increased win rates in enterprise sales—all attributed to richer voice data insights. AssemblyAI also emphasizes developer experience: its APIs are simple to integrate, well-documented, and backed by a no-code Playground for rapid prototyping.
Critically, AssemblyAI operates as a pure infrastructure layer—not a vertical SaaS product—giving builders full control over data, UX, and logic. Whether you’re transcribing podcast episodes, analyzing sales calls, or powering real-time captioning, AssemblyAI ensures the underlying speech understanding is accurate, fast, and reliable. With continuous model innovation (e.g., the Universal-2 architecture) and a focus on real-world performance, AssemblyAI has become the backbone of many of today’s most innovative voice AI applications.
High-Accuracy Transcription: Achieves industry-leading accuracy with low word error rates.
Multilingual Support: Transcribes audio in over 99 languages and dialects.
Speaker Diarization: Identifies and labels different speakers in audio recordings.
Real-Time Streaming: Provides low-latency transcription for live audio feeds.
Automatic Language Detection: Automatically identifies the language of the audio for appropriate processing.
Audio Intelligence: Offers features like sentiment analysis, entity detection, and PII redaction.
Custom Vocabulary: Allows the inclusion of custom words and phrases to improve transcription accuracy.
Scalable Infrastructure: Supports high concurrency and large-scale deployments.
Developer-Friendly API: Provides a RESTful API with comprehensive documentation and SDKs.
Secure Data Handling: Ensures data privacy and compliance with industry standards.
Podcast Transcription: Convert podcast audio into searchable text for accessibility and SEO.
Meeting Notes: Automatically transcribe and summarize meeting discussions.
Customer Support: Analyze customer service calls for quality assurance and training.
Voice Assistants: Integrate speech recognition into virtual assistants and chatbots.
Content Moderation: Detect and filter inappropriate content in audio streams.
Legal Transcription: Transcribe legal proceedings and depositions accurately.
Medical Transcription: Convert medical dictations into structured text for records.
Media Subtitling: Generate subtitles for videos to enhance accessibility.
Market Research: Analyze focus group discussions for insights and trends.
Language Learning: Provide transcriptions for language learners to improve comprehension.
Nano Tier: $0.12 per hour – Ideal for applications requiring a balance between speed and accuracy.
Async Tier: $0.37 per hour – Suitable for batch processing of audio files.
Streaming Tier: $0.47 per hour – Designed for real-time transcription needs.
Custom Plans: Available upon request for enterprise-level requirements.
Free Trial: Offers a free trial with $50 in credits for new users.
Volume Discounts: Discounts available for high-volume usage.
Custom Vocabulary: Additional fees may apply for custom vocabulary integration.
Audio Intelligence Features: Additional charges for features like sentiment analysis and entity detection.
Support Plans: Premium support options available for enterprise customers.
Data Storage: Charges may apply for storing transcribed data.
Trusted by leading companies like Zoom, Siro, and Pfizer.
Achieves industry-leading accuracy with low word error rates.
Supports over 99 languages and dialects.
Provides real-time streaming with low latency.
Offers advanced audio intelligence features.
Ensures secure data handling and compliance.
Provides a developer-friendly API with comprehensive documentation.
Offers scalable infrastructure for high concurrency.
Provides customizable vocabulary integration.
Offers premium support options for enterprise customers.
Q: What languages does AssemblyAI support?
A: AssemblyAI supports transcription in over 99 languages and dialects.
Q: How accurate is AssemblyAI’s transcription?
A: AssemblyAI achieves industry-leading accuracy with low word error rates.
Q: Can I use AssemblyAI for real-time transcription?
A: Yes, AssemblyAI offers a Streaming Speech-to-Text API for real-time transcription needs.
Q: Does AssemblyAI provide speaker diarization?
A: Yes, AssemblyAI can identify and label different speakers in audio recordings.
Q: Is there a free trial available?
A: Yes, AssemblyAI offers a free trial with $50 in credits for new users.
Q: Can I customize the vocabulary for transcription?
A: Yes, AssemblyAI allows the inclusion of custom words and phrases to improve transcription accuracy.
Q: What is the pricing structure?
A: AssemblyAI offers a pay-as-you-go pricing model with rates starting at $0.12 per hour.
Q: Does AssemblyAI offer enterprise support?
A: Yes, AssemblyAI provides premium support options for enterprise customers.
Q: How do I get started with AssemblyAI?
A: You can sign up and start using AssemblyAI’s API by visiting their website.
Q: Is AssemblyAI compliant with data privacy regulations?
A: Yes, AssemblyAI ensures secure data handling and compliance with industry standards.
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