We build websites for businesses and real estate agents, and web applications for businesses that need a tool of their own. You see a working version before anything is final.
Website
A Philadelphia real estate practice with nine neighborhood market pages rebuilt every month, and the work of ranking a new site against the portals.
custom Flask · Google Cloud VM · interactive charts · local SEO
Web application
A web application that turns an address into a neighborhood map anyone can embed with a single line of code.
Flask · MapLibre GL · PostgreSQL · Stripe · Google Cloud Run
Online store
Shopify’s stock Dawn theme stripped to its frame and rebuilt as a bespoke liquid glass system, designed for phones first.
custom Shopify · liquid glass UI · custom sections · mobile-first
We build business websites, web applications and realtor websites. Every website also comes with Formed, our own form service.
A business site that’s built to be found when people search for what you do, and that reassures anyone who got your name from a friend and looked you up.
Web design in PhiladelphiaAn application that does one job for your business or your customers, with the accounts, data and billing it needs, and an embed when it has to work inside another site.
Web application developmentBuilt around what an agent’s site has to do, and often around neighborhood pages that show what each local market is doing.
Websites for realtorsIt saves every message sent through your site and sends the sender a confirmation email with your logo, styled to match the site.
Emails that match your siteEvery project goes through the same four steps, and the second one puts a working version in your hands.
You tell us what you need, and we work out the best approach together. Before anything gets built, we agree on a timeline, the deliverables and what maintenance after launch will look like.
We send an early working version you can open on your phone, scroll through and tap around in. Changes are quick to make at this stage, so this is the time to ask for them.
Once the layout is settled, you get a copy file that follows it section by section, and you write it in your own voice. We put your words on the site as you wrote them.
The site goes live, and if we agreed on maintenance in the first step, it starts here.
We use AI tools to move faster, and the person who builds your project still decides what to build and checks whether it’s working.
Read how we workThis is step two in practice. Before Endure Cool Patch’s new Shopify liquid glass tab bar went live, the store’s team could press it and drag it around. The bar on this page is a working copy of it, set to the values that shipped.
Press the bar at the bottom of the phone and drag.
How Endure’s Shopify liquid glass came together
For women who run hot
Instant cool, on your terms.
A drug-free cooling patch that works the moment you peel it.
Letter Box Digital builds bespoke websites and web applications in Philadelphia. Our founder spent years in real estate sales and operations and came away convinced that a website should be the hardest-working asset a business owns.
More about usMost of what we build is written in Flask, keeps its data in PostgreSQL and runs on Google Cloud. Those projects are written from scratch for the business, so there’s no theme or plugin code to work around.
Look under the hoodIt might be a new site, a web application or a problem you haven’t found the right tool for yet. Write a few lines about it and we’ll reply within one business day.
Or email [email protected].
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