Accurate, secure, and scalable AI-powered speech-to-text and text-to-speech APIs for global voice AI applications.
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4 Speech-to-Text API tools
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A speech-to-text application programming interface turns spoken audio into written words inside another product or workflow. It can create meeting notes or live captions. This saves you from typing everything by hand and makes recordings easier to search and use.
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Industry-leading AI models to transcribe and understand speech with unmatched accuracy and scalability.
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Enterprise-grade Voice AI APIs for real-time speech-to-text, text-to-speech, and conversational voice agents.
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The speech-to-text backbone for voice platforms with real-time, multilingual transcription and unbeatable accuracy.
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Which Speech-to-Text API tool do you use, and why?
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2 decisions
How to choose Speech-to-Text API tools
Start with the kind of audio you need to handle. Live conversations, recorded meetings, and customer calls can lead to different choices, especially when you need extra details beyond a basic transcript.
- 01 of 02
Live meetings and captions
Live captioning helps people follow speech as it happens, while meeting transcription keeps a written record for later.
- Speechmatics is a strong pick for live captions that also need speaker diarization.
- Gladia suits meeting transcription that can connect with Google Meet, Microsoft Teams, or Zoom.
- Speechmaticspaid
- Gladiapaid
- 02 of 02
Calls and conversation details
For customer conversations, speech analytics can reveal more from a transcript, while audio transcript enrichment adds useful context.
- AssemblyAI is useful when you want action items pulled from conversations.
- Deepgram fits call automation that combines transcription with speech recognition.
- AssemblyAIpaid
- Deepgrampaid
4 questions
Common questions
Can these tools transcribe more than one language?
Yes.
All four support multilingual transcription.
Can they tell different speakers apart?
Speechmatics, AssemblyAI, and Deepgram support speaker diarization, which separates speakers in a transcript.
Which tools can create live captions?
Speechmatics and Gladia support live captioning.
Can I run a tool on my own infrastructure?
Speechmatics, AssemblyAI, and Deepgram offer self-hosting.
Deepgram also offers a private cloud option.