Voice & Speech
AssemblyAI
AI speech-to-text API for transcription and audio intelligence
Website checked and live 2 days ago · how we check
speech-to-text API
transcription
audio intelligence
NLP
About AssemblyAI
AssemblyAI is a speech AI platform for developers. Its API turns audio and video into accurate text with speaker labels, timestamps and punctuation, in batch or real-time streaming, across many languages.
On top of transcription, AssemblyAI provides audio intelligence features: summarisation, topic and entity detection, PII redaction, content moderation and sentiment analysis. LeMUR lets you apply large language models to your audio, for example to ask questions about a call, extract action items or generate custom summaries. Companies use it to build meeting tools, call analytics, podcast and media products, and voice agents.
Good fit if you: are building a product that needs reliable speech-to-text plus AI analysis of conversations.
Less ideal if you: want a ready-made transcription app with a user interface; AssemblyAI is an API for developers.
Pricing: pay-as-you-go with free starting credits; volume and enterprise pricing are available.
On top of transcription, AssemblyAI provides audio intelligence features: summarisation, topic and entity detection, PII redaction, content moderation and sentiment analysis. LeMUR lets you apply large language models to your audio, for example to ask questions about a call, extract action items or generate custom summaries. Companies use it to build meeting tools, call analytics, podcast and media products, and voice agents.
Good fit if you: are building a product that needs reliable speech-to-text plus AI analysis of conversations.
Less ideal if you: want a ready-made transcription app with a user interface; AssemblyAI is an API for developers.
Pricing: pay-as-you-go with free starting credits; volume and enterprise pricing are available.
Frequently Asked Questions
What is AssemblyAI?
AssemblyAI is an API for speech-to-text and audio intelligence, such as summaries, speaker labels and PII redaction.
What is LeMUR?
LeMUR is AssemblyAI's framework for applying large language models to audio, for example to ask questions about a recording.
Is AssemblyAI free?
AssemblyAI gives free starting credits, then charges pay-as-you-go.
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Alternatives
Best AssemblyAI Alternatives
Looking for something like AssemblyAI? These are the highest-scored Voice & Speech tools in our directory, ranked by score, never by who paid: Auphonic, Maestra, Hedy AI, TTSMaker, Picovoice and more.
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