Voice AI Development
Voice & Automation

Voice AI Development

Voice agents that customers don't hang up on.

Voice is the highest-bar surface in AI. Half a second of latency or a single off-script reply and the customer is gone. We've shipped voice agents at fleet scale that hold the line — across regulated healthcare, B2B sales, and white-label automotive service.

210ms
P95 turn latency
3–8 wk
Typical timeline
20+
Voice agents live
99.3%
Production uptime
Client outcome
210ms p95 turn latency, in production, on real telephony.
Get a proposal
StackTwilioLiveKitVapiDeepgramOpenAI TTSElevenLabsAnthropicRedis

What we build

01
Sub-second turn pipelines

Streaming STT → policy → LLM → TTS, co-located in a single region with end-to-end token streaming for sub-200ms perceived latency.

02
Real telephony depth

Twilio Voice, LiveKit, direct SIP. Inbound, outbound, transfer, voicemail, hold, DTMF — the full telephony protocol, not just a demo call.

03
Function calling that hits production systems

CRMs, EHRs, scheduling systems, billing. Mid-call, with idempotency and rollback built into every tool.

04
Compliance & redaction at every hop

PII redaction in STT output, HIPAA-grade recording controls, per-jurisdiction policy switches, and immutable audit logs.

05
Eval harnesses for voice

Golden conversations, voice-specific regression tests, synthetic stress tests, and A/B harnesses to ship voice changes safely.

06
Observability built in

Per-turn p95 latency, hand-off rate, intent confidence, and cost-per-call dashboards from day one — not bolted on after the first incident.

How we deliver

Week 1
Discovery & call sampling
We listen to 200–1,000 of your real calls. Hand-label intents. Build the eval set before we build the agent.
Week 2–3
Prototype on real telephony
An agent picks up a real phone number and runs against your real CRM in staging. Engineers and ops review daily.
Week 3–4
Compliance review
Legal, security, and clinical (where relevant) sign off on policy controls, redaction rules, and recording configuration.
Week 4+
Pilot → fleet
Limited rollout with shadow mode. Measure. Tune. Scale to fleet — typically within 6–8 weeks of kickoff.
Evolve Edge team

From Evolve Edge

“Voice AI is deceptively easy to demo and brutally hard to ship reliably. We focus on production fidelity — latency, error handling, compliance — not demo polish.”

FAQ

What latency is realistic?
200–280ms p95 turn latency on streaming pipelines co-located with telephony. Anything advertised below 150ms is, in our experience, a benchmark number, not a production number.
Twilio or LiveKit?
Twilio for compliance-heavy and PSTN-first. LiveKit for in-app voice with rich UX. We've shipped both, often together on the same platform.
Can you handle HIPAA / PCI?
Yes. PII redaction, BAAs, encryption at rest and in transit, immutable audit logs. Our healthcare voice deployments pass clinical review.
How fast can a voice agent go live?
Voice Pilot accelerator: 21 days from kickoff to a live agent on a real number. Fleet rollout typically 6–10 weeks total.

Related services

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A senior engineer will review your project and reply within one business day with a clear next step.