The OpenAI Realtime API is a developer interface for building voice agents that listen and speak in real time.
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Amazon Lex is a managed AWS service for adding conversational interfaces to applications through voice and text.
The Deepgram Voice Agent API is one real-time API that combines speech recognition, language model orchestration and speech synthesis, so developers do not have to stitch separate services together.
Developers building real-time communication features into apps get a complete solution that handles voice, video, chat, and live streaming through APIs and SDKs
Sub-second speech-to-text across 55+ languages with AI voice agents
Managing multiple speech API accounts
Fixie
Microsoft Azure AI Speech, now branded Azure Speech in Foundry Tools, is a cloud service for adding voice to applications and agents.