Cero OS™

Your pipeline is bleeding leads while you're showing homes.

I recover 10+ hours a week and at least $10,000 in dead leads for real estate agents in 30 days. One AI system that acts on its own. You learn nothing. You hire nobody. If it doesn't work, you get a full refund and keep every system I built.

Built by an MD·Done in 30 days·Money back if it doesn't work
The Lead Problem
A Zillow lead comes in during a showing. By the time you see it, they've already talked to two other agents.
The Tool Problem
You're paying for kvCORE or Follow Up Boss. You log into it twice a month. The follow-up doesn't happen on its own.
The Time Problem
You answer the same questions 20 times a week. "What's the process?" "What do I need for closing?" That's not selling.

The money is already inside your pipeline. You just can't see where it's leaking.

01 · The problem

Four holes in your pipeline. Each one costs you money right now.

The Lead Bleed

You're in a showing. A lead comes in from Zillow. By the time you get back to your phone, they've already responded to two other agents. Leads don't wait. The window is minutes. Most agents miss it every day. One slow response is one missed transaction. The average commission on a typical deal is $10,000 or more.

The Tool Bleed

You're paying for kvCORE. Or Follow Up Boss. Or Sierra. You set it up, got overwhelmed, and now you log in twice a month. The automation is there. You just never told it what to do. Every CRM on the market requires you to manage it. That's not follow-up. That's intention. $500 to $1,500 a month in subscriptions. A CRM full of cold leads no one is calling.

The Client Bleed

You have 10 clients at different stages. Three of them haven't heard from you in two weeks. One of them is starting to wonder if you're still working on it. Clients don't always say something. Sometimes they just go quiet and use someone else next time. Most real estate business comes from past clients and referrals. One cold relationship is two or three future transactions gone.

The Reputation Bleed

You closed the deal. The client was thrilled. You meant to ask for a Google review. That was four months ago. The next buyer searched your name and saw six reviews. Your competitor had forty-three. You didn't get the listing appointment. Zillow and Google rank agents by review count. The agent with more reviews gets the call. Every call they take is a $10,000+ transaction you'll never know about.

Cero OS™ stops all four. One system. You learn nothing. It acts on its own.

What is Cero OS™

One AI system that runs your front office while you're showing homes.

Every CRM on the market (kvCORE, Follow Up Boss, Sierra, CINC) is software you have to manage. Cero OS™ is different. A single autonomous AI agent that acts on its own, on your behalf, using your voice and your rules. It answers leads, follows up with cold prospects, keeps mid-transaction clients warm, and asks for reviews at exactly the right moment.

You never log into a dashboard. You never configure a workflow. Every morning you get one short summary of what happened overnight: who was contacted, what needs your attention, and what can wait. That's the whole experience.

Runs on your stack

Cero OS™ connects to the tools you already have. Nothing new to learn. Nothing new to manage.

ZZillow
kkvCORE
GoogleGoogle
FFollow Up Boss
SlackSlack
StripeStripe
SSierra
GmailGmail
ZZillow
kkvCORE
GoogleGoogle
FFollow Up Boss
SlackSlack
StripeStripe
SSierra
GmailGmail
CCINC
InstagramInstagram
RRealtor.com
FacebookFacebook
ZapierZapier
CCal.com
OOutlook
WhatsAppWhatsApp
CCINC
InstagramInstagram
RRealtor.com
FacebookFacebook
ZapierZapier
CCal.com
OOutlook
WhatsAppWhatsApp
Inside Cero OS™

Four sub-agents. Each one stops a different bleed.

They share one brain, one contact log, and one rule: no person gets contacted by two modules in the same week.

Stops the Lead Bleed

Cero Front Desk™

Answers every inbound lead from Zillow, your website, or a referral text. In under 60 seconds, any time of day. Qualifies them. Answers their first questions. Books the call. You show up to a warm conversation, not a missed opportunity.

Stops the Tool Bleed

Lead Recovery Engine™

Your CRM is full of cold leads that went quiet. Buyers who stopped responding. Sellers who said "not yet." This module works through that list automatically, in your voice, until someone says yes or no. No manual follow-up. No "just checking in."

Stops the Client Bleed

Client Pulse™

Watches for clients going quiet mid-transaction. When someone hasn't heard from you in too long, the system sends a check-in in your voice before they start wondering where you are. You find out after it works, not after the relationship cools.

Stops the Reputation Bleed

Reputation Engine™

Asks for Google and Zillow reviews at exactly the right moment. Two to three weeks after closing, when the goodwill is still warm and the client isn't overwhelmed by paperwork. Timing is the whole game. The system knows when to ask. You stop forgetting.

02 · A morning with Cero OS™

While you slept, Cero OS™ handled the night.

You don't log in. You don't approve every message. You read one brief at 7am and go show homes.

# daily-brief
Auto-posted every morning by Cero OS™
Today
NEW
C
Cero OS™ APP 7:02 AM

Good morning, Sarah. Here's where things stand for Monday, June 2.

Handled overnight
  • Answered 8 inbound leads from Zillow and your website. Booked 2 buyer consultations
  • Re-engaged 14 cold contacts from your CRM. 3 replied and are ready to talk
  • Sent a check-in to 4 mid-transaction clients who went quiet. All 4 responded
  • Sent 5 review requests to recent closings. 2 new 5-star Google reviews
Needs you
  • Marcus T. asked to move Thursday's showing to Friday. Want me to confirm?
  • A seller sent a message about their listing price. I held it and flagged it for you. No auto-reply.
Recommended moves
  • Approve this week's re-engagement batch to 6 cold buyer leads
  • Approve the follow-up for the Henderson showing. It's ready to send at noon
👍 1 👀 2 +
Reply to Cero OS™…

This is the whole interface. One brief, every morning.

How It Works

Three steps. You're done after step one.

Step 01

Run the Bleed Map™

A 90-minute paid diagnostic. I find exactly where your pipeline is losing leads and time. You get a written MD-signed report with a named system recommendation and a fixed quote. $1,500 — credited in full toward the install if you sign within 14 days.

$1,500 diagnostic
Step 02

I install Cero OS™

I build and configure the system on your existing stack. No new software for you to learn. No assistant to hire. No workflow to manage. Done in 30 days or less.

30-day install
Step 03

It runs. You read.

Every morning you get one short summary. What the system did overnight. Who it contacted. What needs your attention. Everything else, it handles on its own. You learn nothing. You hire nobody.

Ongoing — Cero Care™
Built by a Doctor

In medicine, we call it a silent bleed. In real estate, it's a lead that goes cold while you're in a showing.

I'm a physician. I spent years diagnosing problems that don't announce themselves. The kind that cost you everything before you notice them. A real estate pipeline bleeds the same way. Leads go cold. Clients drift. Reviews never get asked for. The money leaves quietly.

I built Cero OS™ to find those leaks and stop them. Not with another dashboard. Not with another tool you have to manage. With a system that acts while you work.

Mauro Castillo

MD · MS · CSCS

Medical Doctor. Master of Science. Certified Strength & Conditioning Specialist.

I diagnose where businesses are losing money. The same way I diagnosed where patients were losing health. Precision over hype. Systems over guesswork.

  • Doctor of Medicine (MD)
  • Master of Science, Sports Training (MS)
  • Certified Strength & Conditioning Specialist (CSCS)
  • Builder · Cero OS™, Jupiter, Florida
30-Day Money-Back Guarantee

If it doesn't work, you pay nothing.

If Cero OS™ doesn't recover at least $10,000 in dead leads or 10 hours per week in the first 30 days, I refund every dollar. You keep every system I built. Every workflow. Every automation. The risk is mine, not yours.

Pricing

Diagnose first. Install second. It runs forever.

01 · The Bleed Map™
A 90-minute MD diagnostic. I find every revenue leak in your pipeline and give you a written report with a named system recommendation and a fixed quote. Credits in full toward the install if you sign within 14 days.
$1,500
02 · The Install
Cero OS™ built and configured on your existing stack. All four modules. Done in 30 days. You learn nothing. You hire nobody. Net price after Bleed Map credit: ~$2,000.
$3,500
03 · Cero Care™
Monthly monitoring, tuning, re-diagnosis, and a quarterly call. The system gets smarter over time. You stay informed. First 30 days included with every install.
$750/mo
Run the Bleed Map — $1,500

30-day money-back guarantee · You keep every system if it doesn't work

Cero Care™ — $750/mo

The system gets better every month.

Markets shift. Scripts go stale. What worked in January needs tuning by June. Cero Care™ is the ongoing layer: monthly monitoring, performance re-diagnosis, voice tuning, and a quarterly call to review what's working and what needs to change. Cancel any time. First 30 days included with every install.

Questions

Things agents ask before they book.

I'm already paying for kvCORE / Follow Up Boss / Sierra. Why do I need this? +
Those tools require you to manage them. You set up the automations, visit the dashboard, configure the sequences. Most agents pay for them and use 20% of the features. Cero OS™ is different. It acts on its own, in your voice, without you logging in. It's not a CRM. It replaces the thing you keep meaning to do but never have time for.
Do I have to change anything in my current setup? +
No. Cero OS™ sits on top of whatever you already run: kvCORE, Follow Up Boss, Sierra, or a spreadsheet. It connects through your existing stack. Nothing gets replaced. Nothing gets disrupted.
How long does the install take? +
30 days from the day we start. You show up for a kickoff call, tell me about your voice, your clients, and your offer. Then I build it. You're not involved in the build.
What if I'm not tech-savvy? +
That's exactly who this is built for. You don't configure workflows. You don't manage dashboards. You read one short summary every morning. Everything else happens on its own.
Is this compliant with NAR rules and my broker's requirements? +
Cero OS™ is a communication and follow-up tool. It does not make offers, negotiate terms, or represent you in any legally binding capacity. We review your brokerage's specific compliance requirements during the Bleed Map diagnostic before we build anything. Nothing goes live that your broker wouldn't approve.
What if it doesn't work? +
Full refund. 30 days. No questions. You also keep every system I built: the automations, the workflows, everything. The risk is mine, not yours.

Your next lead is coming in while you're reading this.

The Bleed Map™ is a 90-minute paid diagnostic. $1,500 upfront — credited in full toward the install if you move forward within 14 days. You leave with a written report, a named system, and a fixed quote. Whether or not you hire me, you'll know exactly where your pipeline is leaking.

30-day money-back guarantee · Built by an MD · Jupiter, Florida

Run the Bleed Map — $1,500