AssemblyAI
by AssemblyAI •Voice & Speech Platforms
Speech AI API platform for batch and real-time transcription, diarization, audio intelligence and LLM workflows.
What is AssemblyAI?
AI Orbit decision brief
A compact reading of the recorded evidence, editorial review signals and comparison data for AssemblyAI.
Recorded strengths
Verified profile evidence records API access for this tool.
Source-backed capability SourceVerified deployment evidence records self-hosting support.
Source-backed capability SourceVerified security evidence records SSO / SAML availability.
Source-backed capability SourceVerified security evidence records SOC 2 Type 2.
Source-backed capability SourceAlternatives are ranked from structured use-case, capability, pricing, platform and taxonomy overlap.
Built from AI Orbit's recorded profile data. Unknown product facts are not inferred.
Features & use cases
Core capabilities listed for AssemblyAI.
Audio Understanding
Analyzes speech, sound, music or other audio inputs.
API Access
Provides programmatic API access for application integration.
Real-time Streaming
Supports low-latency streaming text, audio or multimodal interactions.
Access, deployment & licensing
Structured product facts with evidence status. Unknown facts are never guessed.
Open source & license
Source check pendingProprietary
Commercial use
Source check pendingCommercial use allowed
Privacy, security & compliance
Provider policies and certifications are shown only when recorded with evidence.
Data training policy
Training use with opt-out / controls
Zero data retention can be enabled so processed audio and transcripts are not stored after processing; additional metadata may still be kept for logging and billing. Verified fact Privacy sourcePricing overview
Pricing stored in AI Orbit's pricing database. Always verify final rates on the provider website.
Pay as you go
Speech-to-text starts around $0.21/hour; model/features vary
Stale · verified 1 month ago
Universal-2 Pre-Recorded
$0.15/hour pay-as-you-go.
Review · verified 2 weeks ago
- Pre-recorded speech-to-text
- billed to actual duration.
Universal-3.5 Pro Pre-Recorded
$0.21/hour pay-as-you-go.
Review · verified 2 weeks ago
- Higher-accuracy async speech-to-text.
Universal-3.5 Pro Realtime
$0.45/hour pay-as-you-go.
Review · verified 2 weeks ago
- Realtime speech-to-text for voice-agent workloads.
Free
Stale · verified 1 month ago
- Free usage allowance applies.
Verified benchmarks & scores
AI Orbit keeps technical tests, product-experience evidence and independent research in separate semantic classes. Only comparable results may contribute to the same composite.
Evidence not yet safe to place in a comparable benchmark class; excluded from universal composites.
Coval/Openbenchmarks Live STT — Average WER
Evidence-based similar tools
Ranked by use-case, capability, pricing, platform, taxonomy and compatible benchmark overlap—not popularity alone.

Speechmatics
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Hume AI
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63% matchsimilar use cases · capability overlap · similar pricing model
Deepgram
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63% matchsimilar use cases · capability overlap · similar pricing model
ElevenLabs
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59% matchsimilar use cases · capability overlap · similar pricing modelIs AssemblyAI right for your workflow?
Compare features, pricing and alternatives before you decide.
AssemblyAI FAQ
Quick answers based on the information currently available in this AI Orbit profile.
What is AssemblyAI?
AssemblyAI is a developer-focused Speech AI platform for pre-recorded and real-time transcription, speaker diarization, language detection, keyterm prompting, audio intelligence and LLM workflows. It uses pay-as-you-go API pricing across multiple speech models and offers enterprise rate limits and deployment flexibility. AssemblyAI is provided by AssemblyAI and AI Orbit categorizes it under Voice & Audio. Its structured capability profile includes Audio Understanding, Speech to Text, API Access and Real-time Streaming; field-level verification may still be pending for some capability mappings.
Who makes AssemblyAI?
AssemblyAI is provided by AssemblyAI. AI company providing speech-to-text, audio intelligence and voice understanding APIs for developers. Within AI Orbit, the product is cataloged in Voice & Audio, which describes its primary product category rather than the provider itself.
What is AssemblyAI best for?
AI Orbit currently maps AssemblyAI to structured use cases including Voiceovers and Transcription. These are reviewed taxonomy mappings used for discovery and fit; field-level evidence may still be pending, so they are not presented as independently verified claims. Supporting cataloged capabilities include Audio Understanding, Speech to Text, API Access and Real-time Streaming.
Does AssemblyAI have an API?
Yes. AI Orbit has verified official evidence that AssemblyAI provides API access. The profile also records official API documentation, so developers can check supported endpoints, authentication and current implementation details at the provider source. API availability can change independently from the consumer product, so production implementations should still be checked against the provider documentation.
Can AssemblyAI be self-hosted?
Yes. Verified deployment evidence shows that AssemblyAI supports self-hosting. Documented deployment modes include API, Cloud and Self-hosted. Deployment rights, infrastructure requirements and enterprise restrictions should be checked against the provider documentation before production use.
How does AssemblyAI handle privacy and security?
AssemblyAI allows customers to opt out of model training and provides zero-data-retention controls. Training use does not apply to opted-out data, European-server data or data covered by a BAA under its published rules. AI Orbit records the data-training policy as: Training use with opt-out / controls. AssemblyAI maintains SOC 2 Type 2 controls, TLS 1.2+ and AES-256 encryption, role-based access and SSO, annual penetration tests and self-hosted deployment options. Verified security certifications listed on the profile include SOC 2 Type 2.
How much does AssemblyAI cost?
AI Orbit currently has verified plan-level pricing data for AssemblyAI, including Pay as you go, Universal-2 Pre-Recorded, Universal-3.5 Pro Pre-Recorded and Universal-3.5 Pro Realtime. Exact rates, billing units, limits and verification dates are shown in the pricing section of this profile rather than compressed into a single potentially misleading price. Because providers can change prices and plan limits, check the linked official pricing source before making a purchase or production decision.