Systems + AI, built for how you actually run your business

Your business works
because you never stop.
Let's fix that.

We find where leads, time, and money are slipping through the cracks, then build the systems that catch them. AI only shows up where it earns its keep.

Start Your AI Integration Roadmap → Meet Hilary & Denise

What makes us different

40 years running businesses.
AI is just the newest tool in the kit.

Plenty of people will sell you AI. We actually run businesses, so we know where it helps, where it doesn't, and how to make it work inside the systems you're already using.

40years combined experience

100+clients served

Real experience, not theory

We were solving business problems long before AI was part of the conversation. That doesn't change now that it is.

We find the actual gap first

Every business is leaking time, leads, or money somewhere. We find it, then match the right fix: technology, process, or just a better system.

AI for people who like people

AI isn't the solution to everything. We'd rather look at your whole system and make a real impact than bolt on a chatbot because it's trendy. When AI is the right call, we explain it like people, not like a manual.

The problems we solve

You've probably lived at least one of these

A call you can't get to becomes the job your competitor got.

You said "I'll send that quote tonight." Tonight became tomorrow. Tomorrow became never.

Your follow-up system is your memory, your inbox, and a few sticky notes.

You bought a tool once. Nobody used it. Now you're careful about trying again.

Leads land in five different places, email, DMs, a form, a voicemail, with no single list that catches them all.

Every bit of growth adds to your plate instead of taking something off.

Who we help

For owners who are great at the work and terrible at clocking out

Revenue is slipping

Leads wait. Proposals stall. Follow-up falls through the cracks. Small breakdowns quietly cost you sales every week.

Time keeps disappearing

Manual work, disconnected tools, and repeated tasks steal hours that should be spent growing the business.

Everything comes back to you

The business depends on your memory, your decisions, and your availability, making it hard to step away or scale.

Whatever the work is, none of it moves without you.

Who Castro Klein is

Two operators, one team

Hilary Engelhart Castro and Denise Klein

We believe business should be easier, not more complicated. Technology, AI especially, has a bad habit of overcomplicating things that should be simple. We build the opposite: systems that actually make your day easier to run.

Sales & marketing systems
Lead follow-up that doesn't rely on memory
Day-to-day operations
AI, layered in only where it helps

Between us, we've been building systems for a long time. Long enough to know AI was going to become part of every system, not a separate thing bolted on the side. So we went all-in on figuring out how our clients can actually use it to make a real difference. Not by building 300 autonomous agents that run without you and definitely aren't plotting anything. By using AI to quietly handle the boring parts so you don't have to.

Hilary Engelhart Castro

Almost 20 years making businesses run better, from the Colorado Women's Chamber of Commerce to hands-on CRM, sales, and workflow design for growing companies.

Denise Klein

Over 20 years building sales and marketing systems across the real estate, mortgage, and construction industries, and putting AI to work inside them in practical, plain-language ways.

We're not just the two of us, either. Behind Castro Klein is an excellent team of developers, systems builders, and project managers who make sure the work gets delivered right.

How we help

We start by finding out what's actually going on

Every engagement starts with an honest look at where your business is losing time, leads, or money. No guessing, no pitch. From there, we build only what you need.

AI Integration Roadmap Consultation

A clear read on how your business runs today, what it's costing you, and the fixes ranked by what matters most.

See how the consultation works →

AI Integration RoadmapRanked by impact

Three real gaps, and what to fix first.

Fix first

Revenue gap. Leads that waited, quotes that never went out, follow-up that stopped short.

Fix second

Time gap. Hours going into work that should not need you.

Later

Friction point. Tools that do not talk to each other, steps nobody owns.

A straight answer on AI, and a 4-day quick-start on the highest-impact item.

The Daily AI Operating System Sprint

Two live Tuesdays in Claude, two hours each, with Denise on screen. You leave with it running, not with notes.

See the Sprint →

Two Tuesdays, two hours each, 1:00 PM Eastern
Ten seats, so everyone gets screen time
A working system pulling from your own calendar and email
Connected to the tools you already use

AI Concierge

One to one AI coaching with Denise, two working sessions a month. You share your screen, we fix the process, then we build it. You keep everything.

See AI Concierge →

Two 45-minute working sessions, every month
Access between the sessions
Month one is setup and the Audit, nothing automated yet
Everything built, in your own account

Systems Builds

From a single automation to a full workflow rebuild, with the tools you already use, with AI layered on top, not bolted on.

Book a Consult →

HighLevel and Zoho builds
Sales & marketing systems
Lead follow-up that doesn't rely on memory
Day-to-day operations
AI, layered in only where it helps

You don't have to know which one you need. That's what the first conversation is for.

See How the Roadmap Consultation Works →

Your business works because you never stop. Let's fix that.

40 years running businesses.AI is just the newest tool in the kit.