AssemblyAI provides speech-to-text and speech understanding models for transcribing and extracting insights from voice data. The platform handles real-time streaming transcription via WebSocket API with support for 99+ languages, speaker identification, automatic language detection, and multilingual code-switching. Beyond transcription, it offers speech understanding capabilities including entity detection, topic detection, key phrase extraction, and sentiment analysis. The infrastructure processes over 600 million inference calls monthly and 40 terabytes of audio daily, with no rate limits or contracts. AssemblyAI positions itself on accuracyend developer experience through unified APIs that integrate with major LLMs.
99% accuracy noisy audio speakers.
Speaker diarization splits conversations.
PII redaction GDPR compliance.
Auto-detects 40+ languages multilingual.
Developer API docs clear fast setup.
Slow real-time processing delays.
Premium features add costs quickly.
Poor audio quality hurts accuracy.
*Price last updated on Feb 16, 2026. Visit assemblyai.com's pricing page for the latest pricing.
