Power best-in-class voice agents
Sub-250ms latency, predictive endpointing, and industry-leading accuracy.
Hello! This is an AI voice agent using our newest streaming speech-to-text model. It is trained on AssemblyAI documentation and information. Ask it anything about AssemblyAI to see how fast and accurate our speech-to-text model is.
It all starts by what your agent hears
From first hello to final answer, conversations just flow—fast, accurate, and natural.
Build voice agents that
solve problems, not create them
Accurate transcription at unprecedented speed keeps voice agents responsive and reliable
Ultra-fast transcription keeps conversations flowing naturally
Lightning fast transcriptions allows your agent to start thinking while the user is still talking.
41% faster median latency than Deepgram Nova-3 (307 ms vs 516 ms) and nearly 2× faster on P99 latency (1,012 ms vs 1,907 ms).- Delivers reliable, unchanging transcripts from the beginning so your system can act with confidence—even before the speaker finishes.
- Adjustable speed↔post‑processing dial to fit every use case.
Knows when to listen and when to answer
Combine acoustic and semantic features with traditional silence detection for faster, more accurate end-of-turn detection.
- Intelligent endpointing decreases end‑of‑turn delay versus traditional silence detection.
- Handles natural pauses without premature interruptions.
- Configurable parameters for everything from voice IVR to chat‑style agents.
Catch names, numbers, and nuance the first time
From addresses to account numbers, Universal-Streaming captures mission-critical tokens with unmatched precision—even in noisy or mobile environments.
- 21% fewer alphanumeric errors on email addresses, confirmation codes, phone numbers, and ID numbers.
- 28% improvement on consecutive numbers for accurately capturing phone numbers, confirmation codes, and account IDs without frustrating repetition.
- 5% improvement in proper noun recognition for names of people, products, and businesses.
Premium performance at a fraction of the cost
Go live with unlimited streams, enterprise-grade reliability, and pricing that stays flat—$0.15/hr, no concurrency caps or hidden fees
- Session-duration pricing starts at just $0.15/hr — charging for total session duration, not audio duration or pre-purchased capacity.
- Unlimited concurrent streams with no hard caps or over-stream surcharges.
- Consistent performance from 5 to 50,000+ streams without performance degradation or usage commitments.
Designed for voice-first experiences
Intelligent Endpointing
Customize End of Turn Detection to more accurately detect when one speaker finishes an utterance in Streaming Speech-to-Text.
Automatic Concurrency Scaling
Handle thousands of concurrent connections without manual intervention, eliminating the need for complex connection management.
Developer Toggles
Fine-tune the balance between speed and post-processing with configurable API options for timestamps, formatting, and punctuation.
Enhanced Visibility
Monitor streaming performance metrics in real-time with comprehensive analytics and usage insights.
Auto Punctuation and Casing
Automatically add casing and punctuation of proper nouns to the transcription text.
The speed difference is immediately noticeable - our users see their conversations transcribed almost instantaneously. It feels so much more responsive than what we were using before.
Ready to plug into your voice‑agent stack
Pre-built integrations with step‑by‑step docs enabling quick implementation without disrupting existing workflows.
Turn voice data into unparalleled product experiences
Partner with the leader in Speech AI to build powerful products with breakthrough industry impact.
