Speech-to-Text API
Highest-accuracy batch transcription for regulatory audit trails, post-call QA scoring, and bulk content moderation workflows.
Transcribe and analyze customer conversations and content to regulate, score, and monitor compliance at scale.
2x
increase in free-to-paid conversion rate
“We needed a provider that could scale with us — offering unlimited concurrent streams, fair pricing, and responsive support.”
80%
increase in customer satisfaction
“Assembly has saved us countless hours managing models, and provided exceptional accuracy.”
2x
increase in free-to-paid conversion rate
“We needed a provider that could scale with us — offering unlimited concurrent streams, fair pricing, and responsive support.”
80%
increase in customer satisfaction
“Assembly has saved us countless hours managing models, and provided exceptional accuracy.”
Monitor, score, and enforce quality and safety standards across customer interactions and user-generated content.
Achieve 94.1% word accuracy for compliance audit trails
Reflect exactly what was said in audit-grade records
Deliver regulatory precision for QA review
Stream in sub-300ms for real-time policy flagging
Moderate harmful speech and compliance breaches live
Detect violations instantly as they happen
Pay as you go with no minimum commitment
Unlock volume discounts as you scale
Count on 99.9% uptime SLA at a fraction of legacy pricing
Accuracy that catches what matters — from regulatory phrases to policy violations — across any audio source.
Highest-accuracy batch transcription for regulatory audit trails, post-call QA scoring, and bulk content moderation workflows.
Sub-300ms real-time accuracy for live compliance monitoring, real-time content moderation, and in-call policy violation detection.
The crucial details captured more accurately than ever — powering reliable downstream workflows.
| AssemblyAI Universal-3 Pro | Speechmatics Enhanced Model | Deepgram Nova-3 | AWS Transcribe | OpenAI GPT-4o Transcribe | |
|---|---|---|---|---|---|
| MER | 7.5% | 17.33% | 18.69% | 20.76% | 12.29% |
| WER | 4.5% | 6.1% | 6.66% | 12.9% | 5.34% |
Put our Voice AI models to the test in our no-code playground.
Try it now