<60sFirst response
AI replies the moment a new lead lands — Zillow, open house, or Facebook.
Case study · Real Estate AI
WarmChats: turn new real estate leads into booked appointments — automatically.
An always-on AI assistant for real estate agents. WarmChats instantly answers every new lead from Zillow, open houses, and Facebook, qualifies buyers and sellers, follows up 24/7 on email and SMS, and books showings straight into the calendar — so no lead ever goes cold.
Next.js · NestJS · Django · PostgreSQL · Claude · GPT-4.1 · event-driven microservices
Executive summary
For real estate agents, speed-to-lead decides who gets the showing and wins the listing. WarmChats removes the human delay entirely: Claude reads and qualifies every new lead — buyer or seller — GPT-4.1 holds a natural, on-brand conversation across email and SMS, and the system books the appointment straight into the calendar, 24/7, with every message tracked. We delivered it as an event-driven microservice platform built to scale from a solo agent's first pilot to a brokerage running thousands of concurrent conversations.
By the numbers
Built for speed-to-lead.
3×More replies
Instant, conversational follow-up keeps buyers and sellers engaged.
24/7Autonomous
Qualifies, nurtures, and books showings with no agent in the loop.
100%Tracked
Every lead, message, and booking logged across email and SMS.
Figures reflect the WarmChats product's automation targets.
How it works
Qualify → Engage → Book, fully automated.
Each new lead flows through three AI stages. The model handles the conversation end-to-end and only escalates to the agent when it genuinely matters.
01Qualify
Lead intake & buyer/seller routing
Claude reads every new lead, works out whether they're a buyer or a seller and how ready they are, and routes them into the right flow automatically.
- Claude classifies intent — buyer, seller, urgency, and fit
- Leads self-route: Buyer → Nurture, Seller → Nurture, Appointment → Booking
- Spam and tyre-kickers filtered before they reach the agent
AI lead routing
02Engage
Instant replies on email & SMS
GPT-4.1 answers within 60 seconds in the agent's voice, asks the right qualifying questions, and keeps the conversation warm around the clock.
- GPT-4.1 replies in under 60s, tuned to the agent's brand voice
- Context carried across the whole thread and both channels
- Hands off to the agent the moment a human is genuinely needed
Conversational AI
03Book
Showings booked automatically
The assistant detects intent to meet, offers real availability, and writes the showing or call straight into the calendar.
- Detects booking intent and proposes open slots
- Confirms and writes appointments automatically
- Reminders and re-engagement close the no-show gap
Zero-touch booking
The product
Inside WarmChats.
The agent-facing product — a live operator dashboard, self-routing AI workflows, and a two-minute setup — all running on the platform we built.
Architecture
Event-driven microservices.
Independent services communicate over events and webhooks, so the AI workload scales separately from the API and the web app — and a slow third-party never blocks a reply.
Web & dashboard
Next.js
- Marketing site, auth, and operator dashboard
- Live conversation view with full message history
API gateway
NestJS
- Typed gateway for web, webhooks, and integrations
- Auth, rate limiting, and event publishing
AI orchestration
Django + LLMs
- Claude lead scoring + GPT-4.1 reply generation
- Prompt templates, retries, and safety guardrails
Messaging & scheduling
Telephony · Calendar
- Inbound/outbound across SMS and chat channels
- Availability lookup and automated booking writes
Engineering patterns
- Event-driven
- Microservices
- Async workers
- Idempotent webhooks
- Audit log
- Horizontal scale
Technology
The full stack.
Frontend
- Next.js
- React
- TypeScript
- Tailwind CSS
Services
- NestJS
- Django
- REST + Webhooks
- Queue workers
Data
- PostgreSQL
- Redis
- Event log
- ORM / migrations
AI
- Claude (Opus)
- GPT-4.1
- Prompt orchestration
- Guardrails
Messaging & infra
- Telephony / SMS
- Webhooks
- Docker
- CI/CD
Outcome
What the business gets.
Every new lead — Zillow, open house, or Facebook — answered in seconds, day or night, with no extra staffing.
Agents freed from repetitive first-touch follow-up to focus on listings and closings.
A complete, searchable record of every conversation, qualification, and booking.
An architecture that scales from a solo agent to a brokerage running thousands of concurrent chats.
Want an AI that books appointments while you sleep?
We design and ship product-grade AI systems — from lead capture to booking — on architecture built to scale. Let's talk about yours.