OpenAI Realtime API alternatives
14 other voice agent platforms listed here. OpenAI Realtime API is paid.
Featured
Vapi
Voice agent platforms
Developer platform for building voice agents
Bland AI
Voice agent platforms
AI agents that place and answer phone calls
Cognigy
Voice agent platforms
Enterprise platform for voice and chat AI agents
Dasha
Voice agent platforms
Conversational AI platform for phone agents
Deepgram Voice Agent API
Voice agent platforms
Speech, language model and voice behind one API
ElevenLabs Agents
Voice agent platforms
Conversational voice agents from ElevenLabs
Hume AI
Voice agent platforms
Voice models that read emotional tone
Parloa
Voice agent platforms
AI agents for customer service conversations
PolyAI
Voice agent platforms
Voice assistants for customer service calls
Retell AI
Voice agent platforms
AI phone agents with a dashboard and API
Synthflow
Voice agent platforms
No-code voice AI agents for calls
Thoughtly
Voice agent platforms
Voice and phone agents for sales and support
Ultravox
Voice agent platforms
Speech-native model and platform for voice agents
Voiceflow
Voice agent platforms
Visual builder for chat and voice agents