AssemblyAI

Key facts: AssemblyAI provides developer APIs that turn audio and video into text with speaker diarisation, timestamps, summaries, sentiment and topic detection, plus content moderation and redaction. It powers transcription features inside other apps rather than being a consumer recorder.

Plans: AssemblyAI is pay-as-you-go, with free credits for new developers to try the APIs. Check the official pricing page for current per-minute rates.

Best for: developers adding accurate transcription to a product. Watch out: accuracy drops on heavy accents, crosstalk and noisy audio — test on your real recordings, not the demo files.

Pros

• Developer APIs turn audio and video into text with speaker diarisation, timestamps and summaries.
• Audio intelligence adds sentiment and topic detection, plus content moderation and redaction.
• Built to power transcription features inside other apps.
• Free credits let new developers try the APIs.

Watch out for

• Accuracy drops on heavy accents, crosstalk and noisy audio, so test on your real recordings rather than demo files.
• It is a developer API, not a consumer recorder app.
• Pay-as-you-go costs scale with audio volume, so high-throughput products need a budget.

Best for

Developers adding accurate transcription to a product. Who should skip it: anyone who just wants to record and transcribe a single meeting by hand.

Pricing

AssemblyAI is pay-as-you-go, with free credits for new developers to try the APIs. Check the official pricing page for current per-minute rates.

FAQs

What does AssemblyAI do? It provides APIs for transcription, speaker labels, summaries and audio intelligence.

Does it handle speaker separation? Yes, speaker diarisation labels who said what, with timestamps.

What else can it detect? Sentiment, topics, and content for moderation or redaction.

How accurate is it on noisy audio? Less accurate on heavy accents, crosstalk and noise, so test on real recordings.