AssemblyAI
Speech AI API for developers — transcription, speaker diarization, sentiment analysis, and summarization
About AssemblyAI
AssemblyAI is an AI speech-to-text API platform used by thousands of developers to add transcription and audio intelligence to their applications. Beyond basic transcription, it provides speaker diarization (who said what), sentiment analysis, topic detection, content moderation, auto-chapters, and entity detection. Best-in-class accuracy on noisy audio makes it a preferred choice for call center analytics, podcast transcription, and voice note apps.
Key Features of AssemblyAI
- ✦Best-in-class speech transcription
- ✦Speaker diarization
- ✦Sentiment and topic analysis
- ✦Auto-chapter generation
- ✦Real-time streaming API
- ✦Content safety detection
Frequently Asked Questions about AssemblyAI
What is AssemblyAI?
AssemblyAI is a freemium audio AI tool by AssemblyAI. AssemblyAI is an AI speech-to-text API platform used by thousands of developers to add transcription and audio intelligence to their applications. Beyond basic transcription, it provides speaker diarization (who said what), sentiment analysis, topic detection, content moderation, auto-chapters, and entity detection. Best-in-class accuracy on noisy audio makes it a preferred choice for call center analytics, podcast transcription, and voice note apps.
Is AssemblyAI free?
AssemblyAI offers a free plan with limited features. Paid plans unlock advanced capabilities.
What can you do with AssemblyAI?
AssemblyAI is used for audio tasks including: best-in-class speech transcription, speaker diarization, sentiment and topic analysis.
Who made AssemblyAI?
AssemblyAI was created by AssemblyAI and launched in 2017.
What are the best alternatives to AssemblyAI?
Top alternatives to AssemblyAI include ElevenLabs, Descript, Suno, FineVoice — all available on aitoolcity.