How much does AssemblyAI's speech-to-text service cost?

AssemblyAI uses a usage-based pricing model, costing $0.0004 per second. This allows users to pay only for the transcription they need, making it a scalable solution for developers and businesses of all sizes.

Who is AssemblyAI best suited for?

AssemblyAI is ideal for developers building voice applications, customer service teams analyzing call recordings for insights, and content creators looking to automate transcription at scale. Its features cater to a wide range of use cases requiring advanced audio analysis.

AssemblyAI

Speech-to-text API with speaker diarization and sentiment analysis

VerifiedUsage_basedEngineering

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Shyft Score

Directory quality rating

Verified

83/100

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Our take

The verdict on AssemblyAI

AI-generated

AssemblyAI provides speech-to-text and audio intelligence with sentiment analysis, but its usage-based pricing may be costly for high-volume users.

Strengths

Real-time transcription
Speaker diarization
Sentiment analysis
Usage-based pricing starts at $0.0004 per second

Limitations

Usage-based pricing
Limited to audio data
No AI agent support

Best for: Engineering teams needing speech-to-text and audio intelligence for transcription and analysis.

Try AssemblyAI's free tier to see if it fits your workflow.

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Benefits

Why teams choose AssemblyAI

Accurate, real-time transcription for faster content processing

Improved customer insights through sentiment analysis of calls

Enhanced content moderation for safer audio platforms

Customizable vocabulary for industry-specific accuracy

Scalable API for high-volume audio processing needs

About

What is AssemblyAI?

AssemblyAI is a speech-to-text API that converts audio files, live streams, and video to text with AI-powered accuracy. Features include speaker diarization to identify who spoke when, sentiment analysis to understand emotional tone, and content moderation for automated filtering. Developers use it to build transcription apps, customer service solutions, and content analytics platforms.

Key capabilities

Real-time transcription

Speaker diarization for multi-speaker audio

Sentiment analysis on spoken content

Content moderation for inappropriate audio

Custom vocabulary support for industry-specific terms

At a glance

Capabilities

API

Use cases

What you can do with AssemblyAI

Transcribe customer support calls and interviews with speaker identification

Analyze customer sentiment from audio interactions automatically

Generate subtitles and captions for video content in minutes

Best for

Developers building voice apps, customer service teams analyzing call recordings, and content creators automating transcription at scale.

Pricing

AssemblyAI pricing

AssemblyAI starts at $0.0004 per second

Starting at $0.0004 per second

Ecosystem

Connected ecosystem

MCP servers, AI skills, and integrations that work with AssemblyAI

MCP servers

Use AssemblyAI with AI agents via these MCP servers

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A Go implementation of the Model Context Protocol for seamless LLM integration.

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Integrations

ZapierSlackGoogle CloudAWS LambdaMicrosoft TeamsTwilioNotionWebflowAirtable

AI & automation capabilities

REST API

MCP ServerN/A

WebhooksN/A

Free TierN/A

FAQs

Frequently asked questions

Common questions about AssemblyAI and its capabilities

AssemblyAI offers real-time transcription, speaker diarization for multi-speaker audio, sentiment analysis on spoken content, and content moderation. It also includes custom vocabulary support for industry-specific terms, making it versatile for various applications.