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Builds sub-second latency voice bots for inbound support and outbound calling, managing telephony streams and real-time inference.
Voice Agent Developer
Each stage transforms your work — output of one feeds the next.
Input
A text-based LLM script and prompt instructions
AI process
Orchestrates low-latency streaming audio while handling human interruptions
Output
A functional, conversational voice API endpoint
Input
A functional, conversational voice API endpoint
AI process
Synthesizes emotional, conversational speech for the agent's dialogue
Output
A custom voice model ready for immediate agent use
Input
A custom voice model ready for immediate agent use
AI process
Traces real-time call transcripts to evaluate prompt adherence and metrics
Output
Dashboard views of call success rates and edge cases
Vapi for handles webrtc endpoints, turn-taking, and interruptions·Retell AI for provides a conversational voice api bridging llms to calls
Voice AI infrastructure to build incredibly fast, human-like voice agents.
Usage-based pricing priced per minute.
Conversational voice API infrastructure for building human-like AI agents.
Usage-based pricing starting around $0.05/minute.
ElevenLabs for generates expressive, realistic conversational voices·PlayHT for offers ultra-low latency voice models for real-time dialog
The most realistic AI text-to-speech and voice cloning software.
Free tier available, Paid from $5/mo
Ultra-realistic text-to-speech and AI voice cloning platform.
Free plan available, Paid from $39/mo
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Bland AI for scales programmable outbound phone calls with transcription·Langfuse for observes conversation latency, token usage, and drop-offs
Hyper-realistic autonomous AI phone calling agents built for enterprise scale.
Pay-as-you-go pricing per minute of talk time.
Open-source LLM engineering platform for traces, evals, and prompts.
Open-source/free tier available, cloud plans scale with usage
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