Built to convert
Every page, layout, and call-to-action designed around one goal: guiding visitors toward becoming customers.
Custom Web Development Agency
Custom websites that turn clicks into customers
Your website is the first thing customers judge, and the last thing most agencies get right. MDX is a custom web development agency: we design and build custom websites and web apps from scratch on Astro, Next.js, or React, so every visitor has a reason to stay, trust you, and buy.
Trusted by brands that take their website seriously 
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About your goals
What's the biggest win you want from your new site?
What to build
What do you most need built?
Where you're at
Where are you with your site today?
Timeline
When do you want it live?
Investment
What budget range are you working with?
About you
What best describes you?
Last step
Where do we send your project plan?
Phone
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Your result
Nice work, there. here's your fit
Custom Website Build
Perfect, there, your full proposal is on its way to your inbox. We'll follow up within 24 hours.
View our work 35 case studies published
$6k custom builds from
24h reply after you enquire
The Solution
We build custom websites your competitors will envy
MDX designs custom websites that do two jobs at once: they make your brand unforgettable, and they turn more of your visitors into paying customers. Our custom website development starts from a blank page, with no templates. For deeper builds, see our React and Next.js development and web app development services.
Every website we build is engineered for one outcome: turning the visitors you already get into customers who buy.
Built to scale
Add pages and features without a costly rebuild.
Fast and reliable
Built for Core Web Vitals: fast loads, rock-solid uptime, smooth on every device.
Slow Load Times High Bounce Rate Lost Customers Outdated Design Low Conversions Generic Templates
The Problem
Your website is losing customers you already paid for
Every day, visitors land on your site and leave. Slow, confusing, forgettable: traffic you paid for, walking straight out the door. We build for startups, established small businesses, e-commerce brands, and larger organizations that have outgrown a template: new brand sites, redesigns, online stores, and web apps with logins and dashboards.
GET STARTED Our Process
From Idea to Launched, Without the Headache
A great website doesn't just look good. It changes how your business grows.
We map your goals
A quick deep-dive into your brand, audience, and goals. We map what your site must do to win. No 40-page questionnaires.
We design and build
We design every page and build it on Astro, Next.js, or React, with reviews and previews at each stage so nothing surprises you. A focused marketing site goes live in a few weeks, and the most popular timeline in our planner is 4 to 6 weeks.
We launch and support
It goes live, tested end to end, and we stay on. You get a site that performs; we keep it fast and growing.
The Outcome
Your website isn't a brochure. It's your best salesperson
Turn the traffic you already get into customers, and make every marketing dollar work harder for you. Recent builds include the M Chocolate online store for The Marmara Hospitality Group (Astro, React, GSAP) and the marketing website plus client trading dashboard for Genesis FX Markets.
Why Us?
Anyone can build a website. Few can make one grow your business.
Most agencies hand you a pretty page.
We build the site that sells for you.
Templates: Guesswork
Conversion-first design
Conversion-first design
that turns heads
Built from scratch
for your brand
Built for speed,
and for SEO
We stay. We
tune.
Every choice backed
by data
Our Craft, Your Expression.
Your site should be selling for you right now. Let's make sure it does.
Book a free strategy call and we'll show you exactly where your site is losing customers and what a fast, custom-built website could add to your bottom line. No pressure, no jargon.
GET STARTED
Impact & Scale 01 35 Case studies published 02 $6k Custom builds start from 03 24h Reply after you enquire 04 Weeks To launch a focused site
BY THE NUMBERS
Metrics that matter. We measure success by the customers we help our partners win and the growth their sites unlock.
Testimonials 
LEAVE A REVIEW 
Don't take our word for it
4.9 /5
We've delivered +100 projects that helps companies generate real results.
Trusted by clients worldwide
MDX understood our brand before we even finished explaining it. They turned EATnaked into a site that feels as clean and honest as the product itself: fast, beautiful, and effortless to navigate. Working with them felt less like hiring an agency and more like adding a team that actually cared.
We needed a site that made us look as solid as the work we do, and MDX delivered exactly that. The whole process was smooth, professional, and on time. Our new website finally matches the quality of our service, and clients notice the difference the moment they land on it.
The level of craft MDX brought to Prevvi was on another level. They didn't just build what we asked for. They pushed the design further than we imagined and made it feel premium end to end. Genuinely impressed with the attention to detail and how easy they were to work with.
MDX took a complex product and made it feel simple and trustworthy for our users. The design is sharp, the experience is seamless, and they hit every deadline along the way. They became a real extension of our team, exactly the kind of partner you want when the details matter.
FAQs
What You're Probably Wondering
01 How much does custom web development cost?
Every site is scoped to your goals and complexity, so pricing is custom. Custom builds start at $6k. You get an exact quote after a quick call.
02 How long does it take to build a custom website?
A focused marketing site goes live in a few weeks. Larger sites and web apps with custom functionality take longer. We work in stages with previews along the way, so you see progress early and there are no surprises at launch.
03 What technologies do you build with?
Modern, fast, SEO-friendly stacks: Astro, Next.js, React, and headless CMS setups like WordPress or Sanity. We pick the tools that fit your goals, not whatever's trendy, so the site stays fast and easy to maintain.
04 Do I own the website and code?
Yes. Everything we build is yours: full code, design files, and accounts. There's no lock-in and no proprietary platform holding your site hostage. You can host it anywhere and bring in any developer later.
05 What is custom web development?
Custom web development means building a website from scratch around your brand, goals, and users, instead of forcing a generic template to fit. You get a faster, better-converting, fully tailored site that does exactly what your business needs.
06 Will my site be fast and good for SEO?
Yes. We build for Core Web Vitals from the start, with clean code, optimized images, and proper structure, so your site loads fast and gives Google every reason to rank it. Performance and SEO aren't add-ons; they're baked in.
07 Do you offer support after launch?
Yes. We don't disappear at launch. We offer ongoing support, maintenance, and improvements so your site keeps performing, stays secure, and evolves as your business grows.
08 Do you build e-commerce websites?
Yes. Online stores are part of what we build, on Shopify or as a custom build, designed around how people shop in your category. We designed and developed the M Chocolate e-commerce site for The Marmara Hospitality Group on Astro and React. We confirm the right platform for your catalog on the first call.
09 Do you build web apps as well as websites?
Yes. Alongside marketing sites we build web apps with logins, dashboards, and custom functionality. For Genesis FX Markets we created the marketing website and the client-facing trading dashboard as one visual system.
10 Can you redesign my current website?
Yes. We start with the same goals session as a new build: what the site must do, what holds it back, and what stays. Design and build then run in stages, with previews at each one.
11 Is MDX related to the MODX CMS?
No. MDX is a design and development studio, not related to the MODX CMS.
Articles
Ideas that
Ideas that
move brands
forward.
Actionable insights on web design, development, performance, and the details that help brands grow online.
GO TO OUR BLOG
Software Development Agency for High-Impact Projects: What to Verify Early (Technical Due Diligence Checklist)
Software development agency due diligence checklist: verify architecture, security, testing, DevOps, and handover ear...
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Startup Web Development: What Sets High-Impact Teams Apart in React and Next.js Projects
Startup web development is fundamentally different from typical software builds. See our portfolio →
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What Sets a Luxury Web Design Agency Apart in 3D Website Projects
Commissioning a luxury web design agency for a 3D interactive site is a business-critical decision for premium brands...
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Ready to build the site that sells for you?
Book a free strategy call and we'll show you exactly where your site is losing customers. No pressure, no jargon.
GET STARTED"At our core, we craft products that blend art direction, modern interfaces, and seamless technology into meaningful digital experiences."
Trusted by ambitious founders and brands
