Corestack Agency
Web design & SEO · St. Charles, MO

Websites that make St. Charles businesses look big.

It works like a 24/7 sales rep, not a business card.

St. Charles blends history with one of the fastest growing markets in the St. Louis metro. We build websites, iOS apps, and AI tools that help St. Charles businesses stand out in a crowded, competitive area.

How good is your website, really?
Drop your address below and find out. Free, 60 seconds.

Free AI audit. 60 seconds. No sign-up walls.

Sample report·yourbusiness.com
4.3
out of 10
Overall
Design quality
6/10
Mobile
3/10
Page speed
2/10
Copy clarity
5/10
CTA strength
3/10
SEO basics
6/10
Contact access
8/10
Professionalism
5/10
SquarespaceWordPress
Fully custom
$599
Sites start here
3 days
First page live
Trusted by St. Charles businesses
M&W Mobile DetailM&W Mobile DetailSB Car RentalEncompass Property GroupCasey Buckman PhotographyPreme FootballPreme FootballBreadStackBreadStack
Real results

St. Charles businesses.
Numbers you can check.

0
from 61
Google speed grade
Before: 61+34 points
M&W Mobile Detail logoAuto detailing

Google grades every website on speed. M&W was failing at 61. Now it scores a 95.

A faster site ranks higher on Google, and a higher spot means more calls.

Result 1 of 3: M&W Mobile Detail
0
pages
rebuilt, approved once
Encompass Property Group logoProperty management

Every page of their site rebuilt, and approved on the first review.

Written the way property owners actually talk, not in tech speak.

Result 2 of 3: Encompass Property Group
Days
not months
from zero to live
SB Car Rental logoCar rental

A brand-new business with no website went live in days, not months.

Name on Google, full site, online booking. All of it built from scratch.

Result 3 of 3: SB Car Rental
Verified Google review · 5.0
“He delivered everything he promised within 7 days, communicated throughout the process, and paid attention to every detail. The website looks clean, professional, modern, and represents my business exactly the way I envisioned it.”
Sam · SB Car Rental, Columbia MORead it on Google →
My own shop runs on this exact stack.

M&W Mobile Detailing is my company too. Same website build, same call tracking, same ads. I eat my own cooking.

  • 95/100 Google speed score
  • Call tracking live
  • Ads running today

Detailers, rentals, property managers, photographers, sports media.

See where your site stands
The work

Real sites. Live right now.

See who we help
mwmobiledetail.com
M&W Mobile Detailing website
M&W Mobile Detailing website on mobile
Mobile Detailing · Columbia95/100 PageSpeed, from 61
sbcarrentalsmo.com
SB Car Rentals website
SB Car Rentals website on mobile
Car Rental · KC, Columbia, STLLive in days, booking built in
encompasspropertygroup.com
Encompass Property Group website
Encompass Property Group website on mobile
Property Management · Mid-Missouri22 pages, approved on first review
breadstackapp.com
BreadStack website
BreadStack website on mobile
iOS App · In-houseOur own App Store app
95/100
best PageSpeed
3 years
building websites, before AI and after
108
five-star reviews on a client's Google profile
3 days
fastest page live
Built fast.
Found on Google.
Working 24/7.

Here is what happens without it

They search. They find someone else.

When your business isn't on page one of Google, customers call whoever is. They never even know you exist.

Your site is slow. They give up.

6 out of 10 people close a website that takes more than a few seconds to open on their phone.

They visit. Then leave without calling.

If someone can't figure out how to call or book you within seconds, they hit back and try the next business.

Is your site doing this? Find out in 60 seconds
What we build

Your whole online foundation.
One place.

Websites

Get found. Get calls.

The first thing a new customer does is look you up. If your site loads slow, breaks on mobile, or buries your phone number, they're calling your competitor. We fix that. SEO, design, and local search included. Three tiers. One fixed quote. Live in days.

From $599Book a call
AI Receptionist

Never miss another call.

Missed calls are missed jobs. An AI receptionist answers your business line 24/7, sounds human, books the appointment, and texts you the details. 250 minutes included every month. Live within days.

Quoted to your volumeBook a call
Video Ads

Scroll-stoppers without a film crew.

AI-produced video ads for Facebook and Instagram, built from your real work and real reviews. Scripted with proven ad frameworks, delivered ready to run.

By consultationBook a call
iOS Apps

Your brand in their pocket.

Not a web wrapper. A real native app that looks like it belongs on the App Store. Accounts, payments, push notifications. Give your customers a reason to keep coming back.

By consultationBook a call
AI Integrations

Stop doing manually what a machine does in seconds.

Custom AI built around your actual workflows. Not a generic chatbot. Saves hours of repetitive work every week. Powered by Claude, wired into your existing tools.

Custom scopeBook a call
Platforms

Squarespace, WordPress, or fully custom.

Already on a platform? We work inside it. Want something no template can do? We build it from scratch to your liking.

Payments, bookings, analytics, email, your Google listing. We wire it all together so it works as one system, not five logins.

Corestack
One connected system.Not five separate logins.
SquarespaceWordPressShopifyStripeResendGoogle AnalyticsBusiness ProfileCal.com
How we work

How we work. No surprises.

One kickoff call. Then a private client portal, built for you, where you see every update as it lands. You stay in control without living in meetings.

  1. 01

    Free AI Audit

    Enter your URL. The AI scores your site across 8 dimensions in 60 seconds. A real report, free, no strings.

  2. 02

    Brief & Contract

    We scope the exact work, sign a clear contract, and collect 50% upfront. No ambiguity, no scope creep.

  3. 03

    Build

    Pages live in 3 days. Full sites in about 2 weeks. You watch progress in your own client portal as it happens.

  4. 04

    Maintain

    Flat monthly care, quoted to your site. Hosting, security, updates, new features. Pause or cancel anytime.

Wesam Sabri, founder of Corestack Agency
3 yrs
building websites
95/100
best PageSpeed
Days
not months
Wesam Sabri
Founder · Columbia, MO
Who am I?

A Columbia owner,
on your side of the table.

I'm Wesam. I live in Columbia and co-own M&W Mobile Detailing, so I know exactly how a local business gets found and what makes the phone ring. Most developers have never run a business. I have, and I built Corestack to give owners big-agency output at a price one owner can actually charge.

Read my full storyor call (573) 639-0322
Business owner myself

I co-own a service business in Columbia. I know what it feels like when the phone doesn't ring, and what changes when it does.

A full team's output

AI systems handle the heavy lifting like a twenty person crew. No payroll, no overhead. The savings land in your price.

Corestack Scan

See your website the way a senior strategist does.

Scans your site across 8 dimensions. A scored breakdown of every gap costing you calls.

Free AI audit. 60 seconds. No sign-up walls.

Corestack Scan · Report
4.3
out of 10
Overall
Design quality
6/10
Mobile
3/10
Page speed
2/10
Copy clarity
5/10
CTA strength
3/10
SEO basics
6/10
Contact access
8/10
Professionalism
5/10

Built from real audits of Missouri businesses.

Areas we serve around St. Charles

St. Charles and the surrounding area.

We work with businesses across Eastern Missouri, from Historic Main Street, New Town, Frenchtown, and out to the nearby towns. If you are near Historic Main Street, you are in our area.

Neighborhoods and districts
Historic Main StreetNew TownFrenchtownFrontier Park
Nearby towns
St. PetersO'FallonCottlevilleWentzville
Industries we work with
healthcareretailmanufacturingprofessional servicestourismrestaurants and cafesretail and local shopsmedical and dentalauto repair and detailingreal estate and propertyhome servicesconstruction and tradesgyms and fitnesssalons and spaslaw and professional serviceshospitality and lodgingcar rentale-commerce
Common questions

Web development in St. Charles, answered.

Do you build websites for St. Charles businesses?
Yes. Corestack builds custom websites, iOS apps, and AI integrations for businesses in St. Charles and across Eastern Missouri. We are a Missouri agency based in Columbia, so working with a St. Charles client is straightforward, remote or in person.
I already have a website. Why would I need you?
Having a website is not the same as having one that works. Most St. Charles sites we look at load slow, bury the phone number, and never rank on Google for the searches that matter. If yours is quietly losing customers, we find it and fix it. Run the free audit and see for yourself, no pressure to switch.
Can you fix my current site, or only build new ones?
Both. If the bones are solid, we tune what is costing you leads and speed. If the platform is holding you back, a clean rebuild pays for itself fast. The audit tells us which one you are, and we tell you the honest answer either way.
How much does a website cost in St. Charles?
Pricing is fixed and transparent. Websites start at $599, and every project gets an exact quote from a short questionnaire before any work begins. No hourly surprises and no padded estimates.
How fast can you launch a site for my St. Charles business?
A single page site can go live in days once we have your content and access. Larger multi-page builds take longer, and we lock the timeline before we start so you always know the date.
Do I own the website when it is done?
Yes. You own the site, the code, and the domain from day one. No lock-in, no holding your project hostage. That is true for every St. Charles client.
Can you help if I already have a site near Historic Main Street?
Absolutely. Start with the free AI audit. It scores your current site in about 60 seconds and shows exactly what is costing you customers, then we fix what matters.

Rather just talk? Me too.

No forms, no funnels. Call me and tell me what you're working with.

Call (573) 639-0322

Or email me directly: hello@corestackagency.com