Real-Time Voice Agents
Live phone and browser-voice agents with streaming and barge-in.
Full-duplex voice agents for phone calls and browser sessions: streaming STT/TTS, mid-call tool use, interruption-aware turn taking, and voicemail fallback.
What you get
4 pillarsStreaming speech loop
Low-latency STT + TTS with partial transcripts and turn control — feels like a phone call, not a turn-based bot.
Telephony bridge
Twilio / SIP integration for inbound and outbound calls, with routing, regional numbers, and call events.
Live tool calls + barge-in
Call tools mid-session without breaking the voice loop. Graceful interruption and cancellation.
Voicemail fallback
Missed-call capture, summaries, callbacks, and SMS handoff so nothing is lost when the agent can't answer live.
Tools we reach for
Not exhaustiveMore in AI Systems Building
Core overview →Personal AI Assistance
A principal-grade assistant across every channel you use.
Business Operations Manager
A multi-agent team that runs a business function 24/7.
AI Software Developer
Agent harnesses that write, review, and ship code.
RAG + Knowledge Systems
Retrieval-augmented chat over a real corpus, with citations.
Messaging Agents
WhatsApp, Telegram, Discord, Slack, iMessage, and web-chat bots.
Agent Orchestration Platform
A fleet of specialised agents, one bridge across your messaging apps.
Custom AI Workflows
Document understanding, autonomous loops, extraction, intelligence.
AI Evals + Observability
Test, trace, and keep agents honest in production.
Frequently asked
4 questionsWhat is a real-time voice agent?
An AI agent you talk to in natural speech, with sub-second response latency. It handles barge-in (interruption), tool calling, and multi-turn context. Use cases: phone-based support, voice-driven workflows, accessibility, and hands-free operations.
What is the typical latency?
End-to-end speech-to-speech runs 400–800ms on streaming providers (OpenAI Realtime, Deepgram + LLM + Eleven Labs). Good enough for natural conversation. Telephone-based agents add ~200ms of carrier latency on top.
How much does a voice agent cost per minute?
Roughly $0.05–$0.20 per minute on streaming providers depending on model and voice. Inbound phone calls add carrier fees. We design for the cheapest provider per task and surface usage dashboards so you see costs in real time.
Can it make outbound calls?
Yes — via Twilio or similar carriers. Outbound use cases include appointment reminders, lead follow-up, payment collection, and surveys. Compliance (TCPA in the US, DNC lists) is built into the dialing layer.
Sounds like the bucket you’re in?
Tell me what you’re trying to build. I’ll send a written proposal within 48 hours of our discovery call.