Web design and development

Web design for Philadelphia businesses

We design and build custom websites for Philadelphia businesses from Malvern, about 25 miles west of Center City, with scope and price in writing first.

Website design in Philadelphia, from Malvern

Website design for city businesses runs from our Malvern office, with most work remote and in-person sessions when the project calls for them.

Why it matters: A city site rarely stands alone; it books, quotes or sells through systems that must keep working after launch.

Go deeper: how a remote build with in-person sessions works

Most of a build runs remotely. You review the designs and then the working site in your own browser, on your own phone, as each part takes shape, so nobody waits for a big reveal at the end.

In-person sessions happen when the project calls for them and are easiest across the region. On a larger project, a kickoff, a launch review or a training session can be planned in person as part of the schedule.

Either way you deal with the people doing the work, not an account manager relaying questions. Feedback goes straight to the person who will make the change.

See how a custom website build runs.

  1. Sites that talk to your systems

    Bookings, a CRM, inventory or payments, wired in and tested so a change on one side does not break the other.

  2. Findable and fast

    Titles, headings and schema go in while the site is built, and Search Console is connected at launch.

  3. Yours to keep

    Source in your repository, domain in your account, hosting you control; no builder subscription keeps it online.

Websites we built

These six sites are ours, and each one opens right here, full size, in a preview window without leaving this page.

Why it matters: A working site shows how a build loads, reads and takes an enquiry, which no mock-up can.

Go deeper: how the previews work

Preview opens the live site inside a sandboxed frame on this page. Atlas Peptides blocks framing, so its preview is a dated screenshot instead.

The domain under each card opens the real site in a new tab. Each one is a business we built for; none is presented as a local storefront.

Between them they cover the usual jobs a small business site has to do: a configurator that prices as you build, online scheduling, booking with reviews pulled in, a shared stock count for a shop and a market stall, a quote form that reaches the office, and a checkout.

The Phantom Arcades website, built by OneAlgorithm

Phantom Arcades

Custom home arcade cabinets

A configurator that prices the cabinet as you build it, and a page for every machine he has made.

The Inspect This Home Inspections website, built by OneAlgorithm

Inspect This Home Inspections

Home inspection

Service pages by area, online scheduling, and reports the owner updates himself.

The The Boards Professor website, built by OneAlgorithm

The Boards Professor

Medical exam tutoring

Booking, tutor profiles and reviews pulled from two platforms into one page.

The The Gorband website, built by OneAlgorithm

The Gorband

Hand block-printed cotton clothing

Moved off Shopify onto Square: one catalogue and stock count for the website and the market stall.

The Starzi Brothers website, built by OneAlgorithm

Starzi Brothers

Excavation and concrete contractors

Moved off Squarespace: a page for each service and town, and a quote form that lands in the office inbox.

The Atlas Peptides website, built by OneAlgorithm

Atlas Peptides

Research peptides

A shop with Stripe checkout and a lab certificate for every lot.

Rebuilding a WordPress or Joomla site

Yes, we take over sites built on WordPress or Joomla and rebuild them as custom code on the same domain, every old address redirected.

What we do: Every existing URL is mapped to its new home before design begins, so earned rankings and inbound links carry over.

Go deeper: what a rebuild keeps and what support covers

A rebuild starts with an inventory of the old site: every page, image and form, and every address that search engines or other sites link to. Content that still earns its place moves across; the rest is retired on purpose, with a redirect, rather than lost by accident.

Plugins and extensions that did a real job, such as a booking widget or a contact form, are replaced by code that does the same job without the update treadmill.

Support after launch is scoped in the written proposal, because every site needs something different. The full method is on the build page: website development.

  1. Website redesign in Philadelphia

    The design and code are replaced while your domain, content and search history stay in place.

  2. Website management after launch

    After launch the site runs on hosting and a domain in your name, and we stay on for support.

How a Philadelphia web project runs

A project here runs in the same five stages as every build of ours, from agreeing what the site is for to launch.

What you get: the scope, price and schedule in writing at stage two, before anything is designed or built.

Diagram of the five stages of a Philadelphia web project, stacked for phones01Agree the purposeaudience · job · connections02Scope in writingpages · price · dates03Design in the browserreal content · real widths04Build and wire it upcode · forms · CRM · analytics05Launch and hand overyour repo · domain · hostingDiagram of the five stages of a Philadelphia web projectA rail runs through five stations: agree what the site is for; scope, price and schedule in writing; design in the browser; build and wire it up; launch, hand over and stay on.01Agree the purposeaudience · job · connections02Scope in writingpages · price · dates03Design in the browserreal content · real widths04Build and wire it upcode · forms · CRM · analytics05Launch and hand overyour repo · domain · hosting
The five stages in order; the written scope, price and schedule come at stage two.
  1. Agree what the site is for

    Who the site talks to, what it must get them to do, and what it connects to.

  2. Scope, price and schedule in writing

    Pages, integrations, price and dates on paper before any design starts.

  3. Design in the browser

    Real content at real widths, reviewed on your own phone as it takes shape.

  4. Build and wire it up

    Code, forms, CRM, analytics and accessibility checks, in one pass.

  5. Launch, hand over, stay on

    The site goes live in your accounts, and we stay on for support.

Philadelphia's businesses, in public numbers

The metro area had 153,791 business establishments in 2023, per County Business Patterns, and 19,805 of them employed 20 to 99 people.

By the numbers: 3,624 establishments worked in computer systems design (NAICS 5415), and 6,330,422 people lived in the metro in 2024.

153,791

Business establishments in the metro

Census CBP 2023 · +3.4% since 2018

19,805

Establishments with 20 to 99 employees

Census CBP 2023

3,624

Computer systems design establishments (NAICS 5415)

Census CBP 2023 ·

Go deeper: the metro's largest employer groups

Health care and social assistance had the most establishments in the metro in 2023 at 19,759, then professional, scientific and technical services at 19,559, retail trade at 18,474, construction at 14,143 and accommodation and food services at 14,064.

What changes between those groups is what the site has to connect to. A practice needs booking and an accessible path for every patient; a contractor needs quote requests that land in the office inbox; a shop needs stock that agrees with the till; a restaurant needs hours and a menu that read on a phone in a hurry.

County Business Patterns counts employer establishments: locations with paid staff, so a sole owner with no employees is not in these totals. The metro grew from 148,772 establishments in 2018.

Our Malvern office, 25 miles from Center City

Our office is at 625 Swedesford Rd, Unit B, Malvern, PA 19355, about 25 miles west of Center City.

The bottom line: most work is remote, and in-person sessions are easiest across the Philadelphia region when the project calls for them.

OneAlgorithm625 Swedesford Rd, Unit B, Malvern, PA 19355(610) 890-9711Mon–Fri 9–5Google Business Profile: 5.0 from 6 reviews, read 23 Oct 2026 Updated 24 October 2026

Do you have an office in Philadelphia?

We work from one office, in Malvern, and come to you in the city when the project calls for it.

Go deeper: visits, calls and where the work happens

Calls and screen-shares cover most of a build, and you review the work in your own browser between them. When a decision is easier in a room, such as a kickoff with several people or a content workshop, we plan the session into the schedule.

The office is open Monday to Friday, 9 to 5, and the phone rings there. One address and one number: calls are answered in that office, during those hours.

Schematic of the counties OneAlgorithm works in, with the office markedSix labelled tiles, one per county, and a crosshair marking the office at 625 Swedesford Rd, Unit B, Malvern, PA 19355. Not to scale.Chester CountyPADelaware CountyPAMontgomery CountyPABucks CountyPAPhiladelphia CountyPANew Castle CountyDE625 Swedesford Rd, Unit BMalvern, PA 19355ABOUT 25 MILES WEST OF CENTER CITY
Schematic of the six counties in our Business Profile, office marked; the street address is in the contact band.

Web design questions from Philadelphia businesses

Not answered here? Call the office: (610) 890-9711

Yes. Most of a build runs remotely, with every stage reviewed in your own browser, and in-person sessions are easiest across the region when the project calls for them. You work directly with the people designing and coding the site.

The scope sets the price, not the ZIP code: page layouts, content, integrations and whether the site sells, books or logs people in. You get the price and the schedule in writing before anything is built.

Yes. A restaurant site is scoped like any other build: menus, hours, bookings or online ordering, and pages that read well on a phone, each part priced in writing before work starts.

You do. The source code sits in your repository, the domain in your account and the hosting somewhere you control, so another developer can pick it up without us.

Web design services for Philadelphia companies

The site is usually the first piece; these pages cover the work that tends to come next.

Start your Philadelphia website project

Tell us what the site has to do and you get the scope, price and schedule in writing before anything is built.

What to have ready

  • What the site has to do: sell, book, explain or log people in
  • Two or three sites you like, and why
  • What you already have: domain, hosting, content, logins

What happens next

  1. 01Send it on the contact page, or call the office.
  2. 02A person at OneAlgorithm reads it and replies.
  3. 03If it fits, the written scope, price and schedule follow.

Start a project

Topic · Website · Philadelphia

What does the site have to do? Tell us on the contact page; the topic is already filled in.

Start a project

Prefer to talk it through?

(610) 890-9711

OneAlgorithm · 625 Swedesford Rd, Unit B, Malvern, PA 19355 · Mon–Fri 9–5

Where these figures come from

Every figure in the numbers section covers the Philadelphia-Camden-Wilmington, PA-NJ-DE-MD metro area (Census code 37980), names its source and gives the date a person at OneAlgorithm read it. Nothing on the page links to a data endpoint.

  • U.S. Census Bureau, County Business Patterns

    Employer establishments by size and by industry (NAICS), 2018 and 2023

    read 21 October 2026 · www.census.gov/programs-surveys/cbp.html
  • U.S. Census Bureau, American Community Survey (1-year)

    Total population, table B01003, 2024

    read 21 October 2026 · www.census.gov/programs-surveys/acs

Our Google Business Profile figures

What our Google listing showed when a person at OneAlgorithm read it. We quote the figures; the reviews are not marked up as ratings on this page.

ListingOneAlgorithm Consulting
Rating5.0 from 6 reviews
Place idChIJnQw01SfzxokRJhcvpzCljCE
Read on23 October 2026
Map linkmaps.app.goo.gl/kVEeTz9dCyB64CGk6