AssemblyAI
Speech-to-text API with diarisation, summarisation, and topic detection.
AssemblyAI is a developer-focused speech-to-text API. Best-in-class accuracy on streaming and batch ASR, with bonus features like speaker diarisation, summarisation, content moderation, and topic detection.
Pros
- ✅ High accuracy
- ✅ Strong streaming API
- ✅ Lots of post-processing features
Cons
- ⚠️ More expensive than Whisper for high volume
- ⚠️ Latency varies
Use cases
transcriptiondiarisationpodcast indexing
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ElevenLabs
FeaturedAudio
9.4
The gold standard for AI voice cloning and TTS.
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Suno
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9.2
Text-to-song AI — full vocal tracks from a prompt.
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Udio
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8.8
Suno's main rival for AI-generated full songs.
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Whisper
Audio · Whisper large-v3
8.6
OpenAI's open-source speech-to-text — the de-facto baseline.
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Resemble.ai
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8.0
Enterprise voice cloning with deepfake-detection layer.
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Murf
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7.8
TTS aimed at corporate voiceover and e-learning.
Freemium· Free preview; from $19/movoiceovere-learning