Strongest fit
Who it is built for
- Developers building voice-enabled applications
- Teams analyzing recorded customer calls
- Product teams building voice agents or AI notetakers
AssemblyAI
APIs for speech transcription, understanding, and voice agents
AssemblyAI provides APIs for pre-recorded, real-time, and synchronous speech-to-text, plus models that analyze transcript content and power voice agents. Developers can add transcription, speaker identification, summaries, sentiment, safety controls, and other audio intelligence to product workflows.
ASAssemblyAIProduct screenshot pending
- Best for
- Developers building voice-enabled applications
- Pricing signal
- USD 0.15 / hour
- Primary category
- Developer tools
- Last verified
- Jul 31, 2026
The decision
Should AssemblyAI make your shortlist?
Start with the job, the team, and the constraints. Product fit becomes much clearer when those three line up.
Practical use cases
Jobs it can take on
- Transcribe recorded audio in 99 languages
- Stream live transcription for a voice application
- Extract speakers, sentiment, topics, and summaries from transcripts
Before you choose
Know the tradeoffs
- Universal-3.5 Pro supports 18 languages, while Universal-2 supports 99 languages.
- The Sync Speech-to-Text API accepts clips up to two minutes per request.
Inside the product
What you can actually do with it.
The core product capabilities, grouped around the work they enable.
Speech-to-text APIs
AssemblyAI offers pre-recorded, real-time, and synchronous APIs for generating transcripts.
Speech understanding
The Speech Understanding API can identify speakers, detect sentiment, label topics, and generate summaries from transcripts.
Voice Agent API
The Voice Agent API provides a voice AI stack with turn detection and interruption handling for production voice agents.
Typical workflow
Developers select an AssemblyAI API and send recorded audio, a live stream, or a short clip. The platform returns transcripts and, when selected, speech-understanding or safety results that applications can use in their workflows.
Plans and official links
Plans and accessUSD 0.15 / hour.
See the entry price, free access options, company details, and direct vendor destinations in one place.
Starting pointUSD 0.15 / hour
See plans- Provider
- AssemblyAI, Inc.
- Based in
- US
Official destinations
Choosing for a real workflow?
Make the tool work with the rest of your operation.
We map the workflow, connect existing systems, choose what to buy, and build what is missing.