Pricing

Universal-3 Pro

$0.21/hour

Most accurate speech-to-text model
Supports multiple languages

Universal-2

$0.15/hour

Highly accurate
Trained on over 12.5 million hours of audio data

Voice Agent API

$4.5/hour

Fastest path to working voice agents
Built on Realtime Speech-to-Text API

Realtime Speech-to-Text API

$0.45/hour

Transcribe live audio with ultra-low latency
Best-in-class accuracy

Pricing from the official site, verified Jun 2026. Always confirm current prices on the vendor site.

Pros & cons Listof.Best analysis

Pros

API with speaker labels and timestamps
Offers summarization, sentiment, and topic detection
Usage-based pricing fits small and large workloads
SDKs for Python, JavaScript, and more
Free tier covers development and testing volume

Cons

Accuracy strongest for English; other languages vary
No listed third-party integrations
Primarily developer-facing, not a consumer UI

What users say Editorial summary

AssemblyAI is commonly used by developers who need to add speech-to-text and audio analysis to their own products without building the underlying models. A frequently noted strength is the breadth of audio intelligence features — transcription, summarization, sentiment, and chapter detection — available through a single API call. A common limitation is that accuracy is most competitive for English content, and the service is entirely API-driven with no consumer-facing interface.

Editorial summary based on public information — Listof.Best does not yet have enough verified user reviews to show a rating.

Best for: Developers building transcription or audio-intelligence features into applications

AssemblyAI vs Otter.ai

	AssemblyAI	Otter.ai
Pricing	Freemium	Paid
Price from	$0.15/mo	$19.99/mo
Free tier	Yes	No
API	Yes	Waitlist
Open source	No	No
Platforms	Web	API
Models	Assemblyai	Otter
Context window	8k	8k
Launched	2017	2016
Languages	99 languages	—
Integrations	—	Slack, Zoom, Salesforce +8 more

Listof.Best analysis Compared with Otter.ai, AssemblyAI starts at $0.15/mo and offers a free tier.

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Tags: Ai Audio Chaptering Audio Data Management Audio Moderation Circle Create React App Deep Information Technology Deep Learning

FAQ

How much does AssemblyAI cost?

AssemblyAI uses a freemium pricing model, with paid plans from $0.15/mo, and it offers a free tier.

Does AssemblyAI have an API?

Yes — AssemblyAI offers an API for integration.

What are the best alternatives to AssemblyAI?

Popular alternatives include Otter.ai, AI Transcriptions by Riverside, Jammable.

Verified Jun 2026

Specs

Pricing	Freemium
Price from	$0.15/mo
Free tier	Yes
API	Yes
Open source	No
Platforms	Web
Models	Assemblyai
Languages	99 languages
Context window	8k
Launched	2017
Popularity rank	#93