Leasey
Solution

Voice AI & Realtime Agents

Realtime voice agents that listen, understand, and respond — grounded in your data and integrated with your systems.

Natural voice interfaces with sub-second latency

Voice changes the UX shape of AI. We build realtime voice experiences — intake flows, coaching conversations, support agents, drive-through ordering — that combine ASR, LLM reasoning, and TTS into a pipeline tuned for latency, interruption handling, and grounded responses.

Outcomes

<800ms
end-to-end voice latency target
>95%
transcription accuracy on domain vocab
24/7
always-on voice availability
How we build it

Our approach.

01

Pick the transport

Twilio for phone, LiveKit or WebRTC for in-app, kiosk SDKs for physical. Transport decides the latency floor.

02

ASR + LLM + TTS pipeline

Streaming ASR, realtime LLM with barge-in, low-latency TTS. Every stage measured in ms, tuned together.

03

Ground the conversation

Same retrieval and tool-call patterns as text chat — just with tighter latency budgets and audio-aware state.

04

Observability & QA

Every call recorded, transcribed, scored. Failure modes (missed intents, silence, interruptions) surface as first-class metrics.

Capabilities

What you get.

Realtime ASR with streaming partial transcripts
Barge-in and interruption handling
Sub-second end-to-end response latency
Tool calls mid-conversation (lookup, booking, updates)
TTS voice selection and emotion control
Telephony integration (Twilio, Vonage) and in-browser WebRTC
Call recording, transcripts, and session analytics
What it looks like

Production-shaped, from day one.

voice.ts
// Realtime voice agent with tool calls + grounding
const agent = voice.create({
  asr: "deepgram-nova-3",
  llm: "gpt-realtime",
  tts: "elevenlabs:rachel",
  tools: [ehr.lookup, scheduling.book],
  retrievers: ["patient_notes"],
  latencyBudgetMs: 800,
  bargeIn: true,
})

agent.on("turn", (turn) => trace.log(turn))
await agent.connect(twilioStream)
Architecture

A proven shape for this solution.

We adapt it to your cloud, data, and compliance requirements. Nothing here is boilerplate — every layer is justified by the numbers.

01
Audio transport (WebRTC / Twilio Media Streams)
02
Streaming ASR (Deepgram, Whisper, Azure Speech)
03
Realtime LLM (OpenAI Realtime, Gemini Live, Claude streaming)
04
TTS (ElevenLabs, Cartesia, Azure, OpenAI)
05
State & memory store for in-flight calls
06
Observability: turn traces, latency per stage, transcript search
Use cases

Where this shows up.

  • Healthcare voice intake with structured capture
  • Voice-based coaching check-ins and session notes
  • Outbound and inbound support voice agents
  • Drive-through, kiosk, and in-store voice ordering
Stack

What we use.

We’re not religious about tools. We pick what fits your constraints and team.

OpenAI Realtime API
Deepgram
ElevenLabs
Cartesia
Twilio
LiveKit
Azure Speech
Whisper
In production

Shipped examples.

Healthcare

Healthcare patient data mapping & health information chat

Mapped and normalized patient data to power a grounded chat experience where patients can ask questions about their own health information — safely.

AWS BedrockAnthropic ClaudepgvectorLangGraphLangfuse
Coaching & Wellness

Coach session intelligence & program updates

Turned coaching session notes and history into structured program updates, progress summaries, and next-action recommendations.

OpenAIAnthropicLangGraphPostgrespgvector
Common questions

What teams usually ask.

How low can latency go?

+

Well-tuned pipelines hit 500–800ms end-to-end on realtime APIs. We measure each stage — network, ASR, LLM, TTS — and optimize the bottleneck.

Can voice agents do tool calls mid-conversation?

+

Yes — lookup, booking, updates, handoff. The hard part is doing them without breaking the flow, which means streaming partial responses while tools execute.

What about accents, noise, and domain vocabulary?

+

Pick ASR per domain, add custom vocabulary / keyword boosting, and validate on your users' real audio — not clean benchmarks.

Ready to accelerate your tech growth?

Schedule your free consultation today and let's discuss how we can help your business scale efficiently.

Tech growth illustration
Ready when you are

Let’s ship your AI system.

Whether you’re scoping a new LLM product, hardening an existing one, or standing up the infra behind it — we’ll map the shortest path to production.

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