Audio Paid

AssemblyAI

Speech-to-text and voice AI APIs for production applications

Visit official website
PricingPaid
Starting price$0.15/hr
Free planNo
Free trialYes
APIYes
Open sourceNo
DeploymentCloud
Last verifiedAugust 3, 2026
Overview

Tool overview

AssemblyAI is listed under Audio AI tools.

Summary

What is AssemblyAI?

AssemblyAI provides APIs for prerecorded, realtime, and synchronous speech-to-text, speaker and language features, speech understanding, guardrails, an LLM gateway, and voice-agent development.

Best fit

Best for

Developers building production speech and voice applications

Audience

Who is it for?

Software developersVoice AI teamsContact-center platformsMedia technology teams
Recommendation

Decision note

Rebuilt from the original export under the complete V412/V411 factual-source-verification workflow. Preview only. Apply remains blocked until Failures = 0, Warnings = 0, Unmapped = 0, Missing = 0; explicit clears are reviewed; image import is disabled or V380 accepts the asset; a representative WordPress edit screen is compared with the export and proposed row; and a post-Apply zero-change Preview succeeds.

Capabilities

Key features

Prerecorded and realtime speech-to-text

Universal and specialized speech models

Speaker, language, and prompting features

Voice Agent and speech-understanding APIs

Workflows

Use cases

Call and meeting transcription

Voice agents

Media captioning and search

Speech analytics

Strengths

Pros

  • Pay-as-you-go with no commitment
  • 99-language lower-cost model
  • Official SDKs and clear API docs
  • Free limited trial
Considerations

Limitations

Speech accuracy varies by language, audio, speakers, and domain.

Production users should test representative audio and review consequential transcripts.

Cost

Pricing details

Pricing modelPaid
Starting price$0.15/hr
Free planNo
Free trialYes
Pricing context

Billing options

Pay as you goCustom volume rates
Pricing context

Pricing note

Universal-2 prerecorded and Universal-Streaming begin at $0.15/hour. Universal-3.5 Pro is $0.21/hour. Add-ons and other APIs have separate rates.

View official pricing
Compatibility

Supported languages

  • 99 languages on Universal-2
Connectivity

Integrations

Python SDK

JavaScript SDK

Go SDK

Java SDK

Ruby SDK

C# SDK

Specs

Technical details

PlatformsWeb, API
Multilingual supportYes
Login requiredYes
Open sourceNo
DeploymentCloud
CompanyAssemblyAI
Editions / plansFree, Basic, Professional, Organization, and Custom plans
Data confidenceHigh
Last verifiedAugust 3, 2026
Documentation → Data source →
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Answers

Frequently asked questions

AssemblyAI provides APIs for prerecorded, realtime, and synchronous speech-to-text, speaker and language features, speech understanding, guardrails, an LLM gateway, and voice-agent development.
Developers building production speech and voice applications
The listed pricing model for AssemblyAI is paid. Pricing can change, so users should verify the latest plan details on the official website.
Yes. The current profile indicates that a free trial is available.
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