In buildEst. Q4 2026voicereference-implementationuk

receptionist-uk

UK-flavoured AI receptionist. Fork Sophie. Deploy for £5/mo. Answer the phone at 3am.

§ 01 · What it is

An open-source, UK-tuned reference implementation of the same voice receptionist running the demo on this site. Twilio UK numbers, sub-1.3s response latency, natural Welsh/British accent handling, GDPR-compliant call logging, and templates for hospitality and professional-services use cases. Fork the repo, add your business logic, deploy in a weekend.

§ 02 · Money it saves

£18,000-£35,000/yr vs a human receptionist part-time

for UK small businesses currently paying for reception cover, using answering services, or losing bookings to missed calls

The math: Part-time UK receptionist ~£12/hr × 30 hrs/week × 52 = £18,720/yr. AI receptionist infra: ~£25/mo Twilio + £10/mo compute + ~£0.14/call variable = <£1,000/yr for a typical SME. Recovered bookings from 24/7 coverage add another £5,000-£15,000/yr for hospitality businesses.

§ 03 · How it works

01
Twilio Media Streams for the UK phone leg. Groq (Whisper Large v3 Turbo) for speech-to-text at ~200ms latency. Claude Haiku for intent classification and response generation. Gemini TTS for natural British voice output. Postgres for booking store and audit log.
02
Static-phrase caching for the 80% of things receptionists say every day ('Hello, [business], how can I help?') — zero latency on those. Dynamic TTS only for the variable bits (names, times, custom confirmations).
03
Human escalation baked in: below-threshold confidence or explicit request for a person triggers a Slack alert or SMS to the on-call phone with the caller's number and the transcript so far. Nobody gets left hanging.
04
Comes with `hitl-review` and `audit-log-llm` pre-wired. GDPR-safe out of the box: UK-region hosting, 30-day retention, right-to-erasure per caller number.

Stack

Node/TypeScriptTwilioGroq (STT)Claude HaikuGemini TTSPostgresRailway / Fly for deploy

§ 04 · Why it beats what's out there

Most open-source voice agent projects assume US phone numbers, US pricing, and American English. Deploying them for a UK business is a week of adaptation work. receptionist-uk is turnkey for the UK market.

What's out there	The gap it leaves
Open-source voice-agent frameworks	Framework-level, not turnkey. You still need to wire up UK phone numbers, GDPR-compliant retention, British-accent voice tuning, and hospitality/professional-services templates yourself — this ships all of those built-in.
Commercial voice-bot SaaS platforms	£200-£800/mo minimum. Vendor lock-in. No self-host option, no source access — a hard no for legal, healthcare, finance and any compliance-conscious industry.
Traditional UK answering services	£300-£800/mo for human cover. Still human-limited: queues at peak times, wait times, inconsistent answers, no availability at 3am. AI answers in under two seconds, 24/7, consistently.

Want this in your business?

I'm building this now. If it fits your problem, let's talk before it ships.

Book a reality-check call →Try the live version

Follow along

Build notes and progress on this system will be posted in the Notes. Or check GitHub when the repo goes public.