Automatically detect languages

Build powerful multilingual speech applications with our advanced Automatic Language Detection capabilities.

Use our API Contact sales

Ultra-fast transcription understands users as they speak

300 ms (P50) latency on immutable finals gives downstream services a head-start without mid-stream revisions.

Delivers reliable, unchanging transcripts from the beginning.
Adjustable speed↔post‑processing dial to fit every use case.
Almost 2x faster on P99 latencies compared to Deepgram Nova-3.

Intelligent endpointing for smoother turn detection

Conversations flow naturally—your agent replies with precise timing, reducing awkward pauses and itteruptions.

Maintain full control with configurable silence thresholds and confidence parameters to fine-tune the experience for your specific use case.
Decreases end‑of‑turn delay versus traditional silence detection.
Handle natural pauses without premature interruptions.

Superior accuracy where it matters

Accuratly capture names, numbers, and business terms—so LLM logic stays on track.

12% overall recognition improvements, ensuring superior accuracy across the board.
21% fewer alphanumeric errors on email addresses, confirmation codes, phone numbers, and ID numbers.
5% improvement in proper noun recognition for names of people, products, and businesses.

Pricing starts at $0.15/hr with unlimited streams

Premium performance comes at a fraction of the cost without capacity planning or surprise fees.

Transparent pricing starting 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.

Fewer correction loops and smoother conversations

Universal-Streaming delivers substantial accuracy improvements where it matters most to prevent "silent transcription errors."

The industry’s highest Word Accuracy Rate
Model	Overall	Alphanumerics	Proper Nouns
AssemblyAI Universal-Streaming	91.1%	94.6%	91.8%
Deepgram Nova-3	89.9%	93.3%	91.4%

Capturing speech is where it starts. Creating outcomes is where it counts.

Learn why today’s most innovative companies choose us.

15% improvement

Jiminny scored 15% higher customer win rates after implementing AssemblyAI.

Assembly is instrumental in our transcription process, providing crucial input for our LLM API to process further. It's become an integral part of our workflow.

Krish Ramineni, CEO and co-founder