NLP & Text Utilities
AssemblyAI
Production speech to text and voice intelligence API
Freemium - from $0.15/hourRuns in the cloud
Pricing
Freemium - from $0.15/hour
$0.15/hour
Platforms
Web
Hosted app
Category
NLP & Text Utilities
66 tools
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Last updated
Nov 6
Listing updated
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Industry-leading accuracy with specialized Universal-1 and Conformer architectures
AssemblyAI provides production-grade speech-to-text, speaker diarization, audio summarization, and sentiment analysis APIs powered by the Conformer-2 and Universal-1 speech models.
Pricing checked Nov 2026
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About AssemblyAI
AssemblyAI builds AI models that accurately transcribe and understand speech. Beyond basic speech-to-text, their API includes advanced audio intelligence capabilities such as speaker identification (diarization), automated topic detection, PII redaction, chapter creation, and sentiment analysis for podcasts, customer support calls, and video archives.
- Industry-leading accuracy with specialized Universal-1 and Conformer architectures
- Comprehensive suite of audio intelligence features like PII redaction and chapters
- Robust streaming real-time transcription with low-latency WebSockets
- Niche dialect and multi-speaker overlapping accuracy still requires clean audio
- Advanced LLM audio intelligence features incur additional per-request costs
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