Transcription Services

Build best-in-class transcription services with Voice AI

Deliver accurate, timestamped transcripts at scale with industry-leading speech-to-text that handles any audio quality, accent, or domain.

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increase in free-to-paid conversion rate

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“We needed a provider that could scale with us — offering unlimited concurrent streams, fair pricing, and responsive support.”

80%

increase in customer satisfaction

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“Assembly has saved us countless hours managing models, and provided exceptional accuracy.”

increase in free-to-paid conversion rate

See case study

“We needed a provider that could scale with us — offering unlimited concurrent streams, fair pricing, and responsive support.”

80%

increase in customer satisfaction

See case study

“Assembly has saved us countless hours managing models, and provided exceptional accuracy.”

Capabilities

Built for every transcription workflow

Accurate, reliable transcription your users can depend on across any audio source or format.

99+ languages with automatic detection

Handle code-switching in multilingual audio

Eliminate manual language selection

Detect languages automatically across global content

Flexible deployment and enterprise scale

Deploy via cloud API or self-hosted infrastructure

Scale with zero rate limits and unlimited concurrency

Maintain consistent low latency at any volume

Price-performance and scalability that grows with you

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

Platform

One API, every transcription workflow

Industry-leading accuracy across any audio type, with the flexibility to handle every transcription use case.

Speech-to-Text API

Highest-accuracy batch transcription for file-based audio/video conversion, timestamped transcripts, and general-purpose speech-to-text workflows.

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Streaming Speech-to-Text API

Sub-300ms real-time accuracy for live transcription services, real-time captioning, and synchronized audio-to-text delivery.

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Benchmarks

Lowest error rate in the industry

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%

Playground

We're not playing around, but you can

Put our Voice AI models to the test in our no-code playground.

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