AssemblyAI
Voice AI infrastructure for builders
By Daily AI Tools · Last updated · How we track tools
Last confirmed: against assemblyai.com. Information may have changed since then; check the vendor before you buy.
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AssemblyAI provides production-ready Voice AI infrastructure for developers, featuring speech-to-text, streaming transcription, guardrails, and voice agent APIs. The platform handles complex audio processing tasks such as language detection, formatting, speaker identification, and medical transcription. It operates on a pay-as-you-go usage pricing model alongside a free trial signup option, with enterprise custom configurations available. Users can integrate these capabilities across various applications through its comprehensive developer API.
- Works on:
- Web, API
What AssemblyAI costs
As printed on assemblyai.com on July 31, 2026
Figures are copied from the vendor's own pricing page, never calculated or converted, and a tier we could not confirm is left out rather than estimated. Pricing changes without notice. Check assemblyai.com before you buy ↗
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What AssemblyAI does well
- ✓ Building real-time voice agents
- ✓ Transcribing pre-recorded audio files with high accuracy
- ✓ Performing call analytics and medical transcription
Key features
- Pre-recorded and real-time streaming speech-to-text transcription
- Speaker diarization to segment utterances by speaker
- LLM-powered Speech Understanding and LLM Gateway
- Custom keyterms prompting and Medical Mode for specialized terminology
People also ask
What models does AssemblyAI offer for transcription? +
AssemblyAI offers flagship models such as Universal-3.5 Pro for both async and realtime audio, as well as Universal-2 supporting 99 languages.
What additional features are available for speech-to-text APIs? +
Available add-ons include keyterms prompting, plain language prompting, speaker diarization, and an optimized Medical Mode.
How can I deploy AssemblyAI models? +
AssemblyAI supports deployment options through its Voice AI Cloud as well as self-hosted infrastructure.
Is AssemblyAI free? +
No. AssemblyAI publishes no free plan. Paid plans start at $0.02 usage-based.
How much does AssemblyAI cost? +
AssemblyAI lists 6 plans: Speaker Diarization at $0.02 usage-based, Keyterms Prompting at $0.05 usage-based, Prompting at $0.05 usage-based, Universal-2 at $0.15 usage-based, Medical Mode at $0.15 usage-based, Universal-3.5 Pro at $0.21 usage-based.
What platforms does AssemblyAI run on? +
AssemblyAI runs on Web, API.
At a glance
- Pricing model
- freemium
- Category
- audio
- Website
- assemblyai.com ↗
- Featured on
- Capabilities
- speech-to-text transcription speaker-identification developer-api
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Pricing
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