AssemblyAI is a developer-focused API for speech recognition and audio intelligence. It offers pre-recorded transcription and real-time streaming, with add-on audio intelligence features such as speaker diarization, entity detection, sentiment analysis, topic detection, summarization, and content moderation. It targets developers building transcription into apps, call analytics, meeting intelligence, and voice AI systems. Key features: - Universal-2 and Universal-3 Pro transcription models - Real-time streaming and batch transcription modes - Speaker diarization (who said what) - Sentiment analysis, entity detection, and topic detection - Auto chapters and summarization - Content moderation and PII redaction
Free $50 credit on signup. Universal-2: $0.15/hr. Universal-3 Pro: $0.21/hr. Add-ons: diarization +$0.02/hr, topic detection +$0.15/hr, summarization +$0.03/hr. Note: 10% price increase effective July 1, 2026 for in-region models.