AssemblyAI

Rising

Voice & Audio

Visit

Heat Score

7-Day Change

+10

A.R.C. Grade

—

Pricing

freemium

AssemblyAI is a speech AI API that transcribes audio, identifies speakers, analyzes sentiment, and extracts intelligence from voice—built for developers shipping voice-first products.

Speech AI API for transcription, speaker diarization, sentiment analysis, and audio intelligence. Used by developers building voice-first applications.

What the signals say about AssemblyAI

AssemblyAI holds a HookFlow heat score of 39/100 in Voice & Audio, currently showing a clear upward trajectory in community and search signals. Over the last 7 days its score moved +10 points (up), -4 over 30 days. On the Lock-In Index it scores 0/100 (highly portable, with low switching cost).

Heat Score

0–100 viral momentum index combining social buzz, search trends & growth velocity

14-day trend

-3

24h

+10

-4

30d

Computed from 3 live sources in the latest pipeline run — more sources, higher confidence.

Heat Score Breakdown

Creator Buzz (30%)3

Search Interest (25%)69

Community Discussion (20%)6

Growth Momentum (25%)80

What does AssemblyAI transcription do?

AssemblyAI converts speech from audio files and streams into text using speech AI models. It supports multiple audio formats and languages for accurate transcription of voice content.

What is speaker diarization in AssemblyAI?

Speaker diarization identifies and separates different speakers in an audio file, labeling which person spoke at each point in the transcript. This is useful for meetings, interviews, and multi-speaker conversations.

How does AssemblyAI analyze sentiment?

AssemblyAI performs sentiment analysis on transcribed speech to detect emotional tone and attitude within audio content, providing insights into the sentiment of speakers throughout a recording.

Does AssemblyAI offer a free tier?

Yes, AssemblyAI operates on a freemium pricing model, offering free access to core features with paid plans available for higher usage and additional capabilities.

Who uses AssemblyAI?

Developers building voice-first applications use AssemblyAI to add speech recognition and audio intelligence features to their products without building speech models from scratch.

Forecast

Decelerating

low confidence

Now

→

+7 days

→

+14 days

A.R.C. Score

A.R.C. ratings are calculated for developer infrastructure and API-first tools. This tool hasn't been evaluated yet or falls outside the A.R.C. scope.

🔓Data Lock-In Index

0/ 100

Lower = more portable. 0 = fully open, 100 = maximum lock-in.

✓ Webhooks Out✓ Bulk Export✓ Open FormatsOpen-Data Compliant ✓

Pricing

freemium

Best For

Teams & Solo