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🎧

AssemblyAI

by AssemblyAI

1.8M / mo
100% Free
Try AssemblyAI (opens in a new tab)

AssemblyAI is a speech AI platform offering transcription, speaker diarisation, sentiment analysis, topic detection, and PII redaction through a single API. Its Universal-1 model delivers best-in-class accuracy across accents and noise conditions, and its async and real-time endpoints serve applications from video indexing to live captioning. Product and engineering teams choose AssemblyAI when they need audio intelligence beyond basic transcription.

AssemblyAI features and capabilities, including which plan they need and how they compare in the CanIUse matrix.

assemblyaiAdded 2025-01-01Catalog rank 9

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Compare AssemblyAI with:

🎵 Suno🎙️ ElevenLabs🎼 Udio🎧 Descript🎙️ Whisper🦦 Otter.ai🔥 Fireflies.ai🌊 Fathom🎵 Stable Audio📻 Adobe Podcast🎙️ Deepgram🤖 ChatGPT
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Directory alternatives

WhisperOpenAI's open-source speech-to-text modelAdded 2026-07-17transcriptionspeech_to_textaudiotext#9FreeMatrixDeepgramReal-time speech recognition API built for productionAdded 2025-01-01transcriptionspeech_to_textaudiotext#8PaidMatrixSonixFast, accurate automated transcription in 40+ languagesAdded 2025-09-21transcriptionspeech_to_textaudiotext#8PaidNottaAI transcription and meeting notes in 58 languagesAdded 2025-09-21transcriptionspeech_to_textaudiotext#8FreemiumSpeechmaticsAI speech recognition API with industry-leading accuracyAdded 2025-06-15transcriptionspeech_to_textaudiotext#5PaidGladiaAI audio transcription and speech intelligence APIAdded 2025-06-15transcriptionspeech_to_textaudiotext#5FreemiumRevAI transcription and subtitling serviceAdded 2025-09-21video_editingtranscriptionsubtitleaccessibility#8PaidRead AIAI meeting assistant with engagement scoringAdded 2025-01-01meetingproductivitytranscriptioncollaboration#8Freemium

✨ Modalities

💬
Text Input
Partial. Prompts steer Speech Understanding. Primary input is audio.
🖼️
Image Upload / Vision
No. Speech platform, not vision.
🎨
Image Generation
No. Does not generate images.
🎙️
Voice Mode
Yes, requires plus plan. Voice Agent WebSocket is a conversational speech product.
🎥
Video Understanding
No. Audio/speech focus.
🎬
Video Generation
No. Not a video generation product.
📁
File Upload (PDF, DOCX)
Partial. Upload audio/video files for async transcription.
💻
Code Execution
No. STT APIs, not a code sandbox.
🔊
Audio Input
Yes, requires plus plan. Realtime and batch STT are the core product.
🖌️
Canvas / Artifact Editor
No. Not a canvas product.
🖥️
Screen Sharing / Computer Use
No. No computer-use product.

🧠 Memory & Context

🧠
Persistent Memory
Partial. Voice Agent retains session context during a call.
📏
Large Context Window
Unknown. Agent context limits were not checked.
⚙️
Custom Instructions
Yes, requires plus plan. Configure Voice Agent prompts and guardrails.
📜
Conversation History
Partial. Transcripts stored per job. Realtime is per-session.

🔌 Integrations

🌐
Web Search / Browsing
Unknown. Web search in Voice Agent was not confirmed.
🔌
Plugins / Extensions
Partial. LLM Gateway and integrations connect upstream models.
🔧
API Access
Yes, requires plus plan. REST and WebSocket APIs for STT and Voice Agent.
⚡
Zapier Integration
Unknown. Zapier listing was not checked.
🤖
Custom GPTs / Bots
Yes, requires plus plan. Voice Agent is a deployable speech bot.
👥
Real-time Collaboration
No. No multiplayer product.
🐦
Live Social Data Integration
No. No social firehose.
📚
Live Citation Mapping
No. Not a cited-search product.

👨‍💻 Developer

🛠️
Function Calling
Partial. Voice Agent can call tools via LLM Gateway.
⚡
Streaming Responses
Yes, requires plus plan. Realtime STT streams partial transcripts over WebSocket.
🎛️
Fine-Tuning
Unknown. Custom STT was not confirmed on homepage.
📐
Embeddings API
No. Not an embeddings product.
📋
Structured Output (JSON)
Partial. Speech Understanding returns structured entities and summaries.
🧩
Reasoning / Thinking Mode
No. Not a reasoning LLM.
🏠
Local Execution
No. Cloud-only STT. Distinct from self-hosted Whisper.
🔓
Open Weights
No. Proprietary models and APIs.
🤖
Multi-Agent Orchestration
No. Single voice agent per session.

📱 Platforms

🌐
Web App
Partial. Dashboard for API keys and playground.
📱
iOS App
No. No iOS app.
🤖
Android App
No. No Android app.
🖥️
Desktop App
No. No desktop app.
🔵
Chrome Extension
No. No Chrome extension.

🔒 Privacy

🔒
GDPR Compliant
Unknown. Compliance docs were not re-read.
🚫
Opt Out of Data Training
Unknown. Training policy was not checked.
🏢
Enterprise Privacy Mode
Yes, requires enterprise plan. Guardrails, EU data residency options, and enterprise contracts.

💼 Workspaces

📂
Projects / Folders
Partial. Dashboard organizes API keys and usage.