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Voice AI · Tool
AssemblyAI
ResearchedAssemblyAI provides AI models to transcribe and understand speech, with its flagship Universal-3.5 Pro handling real-time and pre-recorded audio across 99 languages. It offers Speech-to-Text, Speech Understanding, Guardrails, LLM Gateway, and Voice Agent APIs via cloud or self-hosted deployments.
Official site snapshots
Visit live site See the official site at a glance
Read-only public captures of AssemblyAI’s homepage. Screenshots are dated, never live embeds, and open full-screen.
In one minute
Start here for the decision-making essentials: what AssemblyAI does, who it is for, how it is accessed, and the first-party sources behind this profile.
Pricing4 options
Pay-as-you-go pricing by product, with a free API trial and custom plans available via sal
Pay-as-you-go pricing with no contracts, minimums, or monthly subscriptions
Failed transcripts are not charged
Free tier and credits available
Platforms
Available on AWS Marketplace
API accessNot public
FoundedNot disclosed by source
AvailabilityWeb / remote
LicenseProprietary
Best suited to
Source-backed fit Startups to Fortune 500s building voice-enabled products Developers needing speech-to-text and speech understanding APIs Organizations requiring Cloud or Self-Hosted Voice AI infrastructure Security-conscious enterprises needing AES-256 at rest and TLS 1.3 in transit Startups to Fortune 500s Used by startups and Fortune 500 companies building Voice AI, with named…
Decision support
6 sourced answersCommon questions and adoption checks
Short answers to the questions buyers and builders commonly ask about AssemblyAI. Each answer cites the shared ledger below, where every source is listed once.
01What does AssemblyAI say it can do?
Provides Speech-to-Text (Pre-recorded, Realtime, Sync) and Speech Understanding APIs, plus · Pre-recorded Speech-to-Text (STT) · Real-time Speech-to-Text (STT) · Offers Pre-recorded, Realtime, and Sync Speech-to-Text APIs.
transcribe Pre-recorded Speech-to-Text API Realtime Speech-to-Text API Sync Speech-to-Text API understand Speech Understanding API Guardrails and Safety LLM Gateway build Voice Agents
02Who is AssemblyAI intended for?
Startups to Fortune 500s · Used by startups and Fortune 500 companies building Voice AI, with named customers includi · Customers range from startups to Fortune 500 companies building voice AI products
From startups to Fortune 500s, leading organizations are unlocking the power of voice data and launching best-in-class products and experiences.
03What use cases does AssemblyAI describe?
Targeted use cases include Voice Agents, AI Notetakers, Call Analytics, Medical Transcript · Voice AI Infrastructure · Targets use cases including Voice Agents, AI Notetakers, Call Analytics, Medical Transcrip · Conversation Intelligence, Medical Transcription, Contact Centers, Voice Agents, and AI No
Voice Agents AI Notetakers Call Analytics Medical Transcription Dictation Agent Assist AI Scribes
04What pricing information is available for AssemblyAI?
Pay-as-you-go pricing by product, with a free API trial and custom plans available via sal · Pay-as-you-go pricing with no contracts, minimums, or monthly subscriptions · Failed transcripts are not charged · Free tier and credits available
Explore pay-as-you-go pricing by product. Try our API for free or contact sales about a custom plan.
05Does AssemblyAI document API access?
Provides Pre-recorded, Realtime, and Sync Speech-to-Text APIs, a Speech Understanding API, · Multiple APIs offered: Pre-recorded Speech-to-Text API, Realtime Speech-to-Text API, Sync · AssemblyAI offers Pre-recorded Speech-to-Text API, Realtime Speech-to-Text API, and Sync S · Offers Pre-recorded Speech-to-Text API, Realtime Speech-to-Text API, Sync Speech-to-Text A
Pre-recorded Speech-to-Text API Realtime Speech-to-Text API Sync Speech-to-Text API understand Speech Understanding API Guardrails and Safety LLM Gateway build Voice Agents
06How can AssemblyAI be deployed or accessed?
Available as Cloud and Self Hosted Voice AI deployments. · Offers both Self Hosted and Cloud Voice AI deployment options. · Provides Self Hosted Voice AI and Cloud deployment options. · Offers both Self-Hosted Voice AI and Cloud deployment options
Self Hosted Voice AI Cloud
Decision guide
Voice AICapabilities and operating fit
This profile connects the jobs AssemblyAI is described as handling with its delivery model, access options and the subjects used to match it to related products in this directory.
Common use cases
- Voice Agents
- AI Notetakers
- Call Analytics
- Medical Transcription
- Dictation
- Agent Assist
Topics mapped
Verified capabilities
- Provides Speech-to-Text (Pre-recorded, Realtime, Sync) and Speech Understanding APIs, plus
- Pre-recorded Speech-to-Text (STT)
- Real-time Speech-to-Text (STT)
- Offers Pre-recorded, Realtime, and Sync Speech-to-Text APIs.
- Provides a Speech Understanding API and a Guardrails and Safety LLM Gateway.
- Voice Agent API for building voice agents
- Industry-leading speech-to-text and speech understanding for building Voice AI products
- AssemblyAI provides Speech Understanding capabilities, Guardrails and Safety, an LLM Gatew
Intended audiences
Access signals
- Pricing model
- Pay-as-you-go pricing by product, with a free API trial and custom plans available via sal · Pay-as-you-go pricing with no contracts, minimums, or monthly subscriptions · Failed transcripts are not charged · Free tier and credits available
- API
- Not publicly listed
- Source links
- 16 recorded
Source-backed
Updated July 22, 2026Verified facts
Each fact points to a recorded source, making it easy to distinguish verified product information from claims that need checking.
AssemblyAI | AI models to transcribe and understand speech
AssemblyAI provides AI models to transcribe and understand speech · Universal-3.5 Pro is the flagship speech-to-text model available for real-time and pre-rec · Provides Pre-recorded, Realtime, and Sync Speech-to-Text APIs
AssemblyAI provides AI models to transcribe and understand speech.
Universal-3.5 Pro is the flagship speech-to-text model, available for real-time and pre-recorded audio.
Provides Speech-to-Text (Pre-recorded, Realtime, Sync) and Speech Understanding APIs, plus Guardrails/Safety, LLM Gateway, and Voice Agents.
Targeted use cases include Voice Agents, AI Notetakers, Call Analytics, Medical Transcription, Dictation, Agent Assist, and AI Scribes.
Supports 99 languages including English, Spanish, Portuguese, French, German, Russian, Hindi, Dutch, Japanese, and Italian.
View 32 more verified facts
Available as Cloud and Self Hosted Voice AI deployments.
Pay-as-you-go pricing by product, with a free API trial and custom plans available via sales contact.
Universal 3.5 Pro is AssemblyAI's flagship speech-to-text model, available for real-time and pre-recorded audio.
Provides Pre-recorded, Realtime, and Sync Speech-to-Text APIs, a Speech Understanding API, Guardrails and Safety LLM Gateway, and Voice Agents.
Targeted use cases include Voice Agents, AI Notetakers, Call Analytics, Medical Transcription, Dictation Agent, and Assist AI Scribes.
Supports 99 languages, including English, Spanish, Portuguese, French, German, Russian, Hindi, Dutch, Japanese, and Italian.
Offers both Self Hosted and Cloud Voice AI deployment options.
Voice AI Infrastructure
Universal-3.5 Pro
Pre-recorded Speech-to-Text (STT)
Real-time Speech-to-Text (STT)
Universal-3.5 Pro is the flagship speech-to-text model, available for real-time and pre-recorded audio.
Offers Pre-recorded, Realtime, and Sync Speech-to-Text APIs.
Provides a Speech Understanding API and a Guardrails and Safety LLM Gateway.
Targets use cases including Voice Agents, AI Notetakers, Call Analytics, Medical Transcription, Dictation, Agent Assist, and AI Scribes.
Provides Self Hosted Voice AI and Cloud deployment options.
Supports 99 languages, including English, Spanish, Portuguese, French, German, Russian, Hindi, Dutch, Japanese, and Italian.
Uses AES-256 encryption at rest and TLS 1.3 in transit
Conducts annual internal and external audits
Penetration tests are conducted at least annually by industry-leading firms on internal and customer-facing assets
Employs network security and role-based access controls
Follows secure SDLC with auditable change management procedures including DPIAs and TIAs
Offers both Self-Hosted Voice AI and Cloud deployment options
Voice Agent API for building voice agents
Conversation Intelligence, Medical Transcription, Contact Centers, Voice Agents, and AI Notetakers
Self-Hosted Voice AI and Cloud deployment options
Universal-3 Pro Streaming with prompting, disfluency control, code-switching, and real-time diarization
99+ language support
Startups to Fortune 500s
Models, APIs, and infrastructure in one place for building voice into any product on any stack.
Voice Agents, AI Notetakers, Call Analytics, Medical Transcription, Dictation, Agent Assist, and AI Scribes.
Supports 99 languages including English, Spanish, Portuguese, French, German, Russian, Hindi, Dutch, Japanese, and Italian.
Practical capabilities
8 documented areasWhat it helps with
A concise view of the jobs, capabilities and integrations described in the recorded product sources.
Voice Agents
AI Notetakers
Call Analytics
Medical Transcription
Dictation
Agent Assist
AI Scribes
Conversation Intelligence
Availability
Source checkedWhere it runs and where to get it
Documented product formats, platforms and official distribution destinations. Availability can vary by region and plan.
Cost / license
Pay-as-you-go pricing by product, with a free API trial and custom plans available via sal · Pay-as-you-go pricing with no contracts, minimums, or monthly subscriptions · Failed transcripts are not charged · Free tier and credits available
Platforms
Models, APIs, and infrastructure in one place for building voice into any product on any sOffers Speech-to-text, Streaming Speech-to-Text, Speech Understanding, and Voice Agent APIAvailable on AWS Marketplace
Adoption notes
DeploymentAvailable as Cloud and Self Hosted Voice AI deployments. · Offers both Self Hosted and Cloud Voice AI deployment options. · Provides Self Hosted Voice AI and Cloud deployment options. · Offers both Self-Hosted Voice AI and Cloud deployment options
LicenseNot disclosed by source
Model supportUniversal-3.5 Pro is the flagship speech-to-text model, available for real-time and pre-re · Universal 3.5 Pro is AssemblyAI's flagship speech-to-text model, available for real-time a · Universal-3.5 Pro · Universal-3 Pro Streaming with prompting, disfluency control, code-switching, and real-tim · Universal 3.5 Pro is the flagship speech-to-text model, available for both real-time and p
Data controlUses AES-256 encryption at rest and TLS 1.3 in transit · Conducts annual internal and external audits · Penetration tests are conducted at least annually by industry-leading firms on internal an · Employs network security and role-based access controls · Follows secure SDLC with auditable change management procedures including DPIAs and TIAs
Learning curveIntermediate
Primary use casesVoice Agents, AI Notetakers, Call Analytics, Medical Transcription, Dictation, Agent Assist, AI Scribes, Conversation Intelligence, Contact Centers, Targeted use cases include Voice Agents, AI Notetakers, Call Analytics, Medical Transcript, Voice AI Infrastructure, Targets use cases including Voice Agents, AI Notetakers, Call Analytics, Medical Transcrip, Conversation Intelligence, Medical Transcription, Contact Centers, Voice Agents, and AI No, Voice Agents, AI Notetakers, Call Analytics, Medical Transcription, Dictation, Agent Assis, AssemblyAI targets use cases including Voice Agents, AI Notetakers, Call Analytics, Medica, Transcribing voice data from calls, virtual meetings, and podcasts
What to verify before adopting
Evolution and major updates
Research in progressAssemblyAI timeline
A concise history of software releases and material product changes. Events appear only when a dated source supports what changed.
Scheduled for research
Building a reliable release history.
This profile is being checked for dated releases and material product changes. Nothing appears here until the exact date and event can be verified from a recorded source.
Dated event Short explanation Original source
Citation ledger
16 unique pagesRecorded sources
Facts, answers, structured details, milestones and primary resource links cite this shared ledger. Each external page appears once; release tags from the same GitHub project are grouped under one release history.
- 1assemblyai.com 10 facts · 3 answers · Official site
- 2assemblyai.com/pricing 6 facts · 4 answers · Pricing
- 3assemblyai.com/careers 8 facts · 1 answer · Official site
- 4assemblyai.com/help 6 facts · 3 answers · Official site
- 5assemblyai.com/blog/the-race-to-ai-integration 6 facts · 2 answers · Official site
- 6assemblyai.com/customers 6 facts · 2 answers · Official site
- 7assemblyai.com/explore/benchmarks-pricing 6 facts · 2 answers · Pricing
- 8assemblyai.com/blog/lower-latency-new-pricing 6 facts · 1 answer · Pricing
- 9assemblyai.com/blog/speech-to-text-api-pricing 6 facts · 1 answer · Pricing
- 10assemblyai.com/docs/billing-and-pricing 6 facts · 1 answer · Pricing
- 11assemblyai.com/security 6 facts · 1 answer · Security
- 12assemblyai.com/blog 6 facts · Official site
- 13assemblyai.com/docs 4 facts · 2 answers · Documentation
- 14assemblyai.com/changelog 5 facts · Official site
- 15assemblyai.com/topic/product 5 facts · Official site
- 16assemblyai.com/docs/faq/please-describe-the-incident-response-plan 3 facts · Documentation
Research status94 substantive facts · 16 source pages · quality score 95/100
Connected directory
Semantic matchesExplore related solutions
These tools share a workflow, capability or audience with AssemblyAI. They may complement it rather than replace it, and are not presented as integrations or endorsements.
