Services: Custom systems in Raleigh, North Carolina
What If the Software Fit Your Business Instead?
Purple Triangle Website Systems builds custom business systems and integrations for organizations in Raleigh, North Carolina, across the United States, and in Nigeria. When off-the-shelf tools do not fit how you work, we build a custom WordPress plugin that does.
From $5,000 scoped per project
Custom business systems are software built for your exact process, usually as custom WordPress plugins connected to your website and other tools. Purple Triangle builds custom WordPress plugins commercially and for clients. Custom systems start at $5,000 and are scoped per project, with a written scope and fixed price before any work starts.
Last updated: October 2026. Written by Christian Egwuibe, founder and lead developer of Purple Triangle.
Why Workarounds Stop Working
Many businesses stitch together several plugins and spreadsheets to run one process. It works until it does not: plugins conflict, data gets out of sync, and the workaround becomes a job in itself.
What This Service Does
We design and build software around your process: booking engines, schedules, intake systems, member areas, dashboards, and integrations with other services. It runs inside your WordPress site, so your team uses one familiar admin and your data stays yours.
How the Pieces Connect
- 01Your ProcessWe map how the work happens today.
- 02Custom SoftwareBooking engines, schedules, intake, member areas, or dashboards.
- 03IntegrationsConnected to the other services you use.
- 04Your TeamWorks in one familiar WordPress dashboard.
Who it is for
Is This Service Right for You?
- Businesses with a process no off-the-shelf plugin handles well
- Logistics, property, and service businesses with unique booking or scheduling rules
- Organizations replacing spreadsheets with a real system
- Agencies that need a white-label plugin for their own clients
Three Results You Can Expect
Software That Fits
Your process drives the software, not the limits of a plugin.
One System, Not Five
Fewer plugins and fewer workarounds mean fewer things that break.
You Own It
The code is built for you and runs on your own site.
What Is Included
- Process mapping and requirements
- Written scope with features, screens, and rules
- Custom WordPress plugin development
- Integrations with third-party services where available
- Admin screens your team can use
- Testing with real scenarios
- Documentation and handover
- Optional ongoing support on a care plan
Pricing
Pricing for Custom Business Systems and Integrations
Clear starting prices, right here. Your exact fixed price is set in a written scope before any work starts. Compare everything on the pricing page.
Custom Business System
From$5,000
- Process mapping and requirements
- Custom WordPress plugin
- Admin screens for your team
- Testing, documentation, and handover
Systems Build
From$12,000
- Full website build
- Custom plugin or portal
- Integrations with your tools
- Phased delivery with fixed prices
Approach
How We Do the Work
We build in phases. Each phase is scoped, built, tested, and delivered before the next one starts, so you see working software early and often.
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Map the Process
We document how the work happens today and what the system must do.
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Scope in Phases
We split the system into phases, each with a fixed price.
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Build and Test
We build each phase and test it with real scenarios before delivery.
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Deliver and Support
We hand over documentation and support the system after launch.
Related work
Sites we have built
A few live examples. Each one opens a short write-up and links to the site itself.
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Client project
AdaBotanics
Handmade botanical tinctures, balms, teas and creams, with a HerbalMatch quiz and a product finder that point visitors to the right formula.
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Our own product
Site Prompt Builder
A WordPress plugin that gives every client project its own Design DNA, then writes the prompts an AI website builder needs.
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Our own product
PT Accessibility Suite
Accessibility tools and site health checks for WordPress and WooCommerce, explained with a live widget and a free page check.
FAQ
Questions About Custom Systems
Why build a custom plugin instead of using an existing one?
If an existing plugin does the job well, we will recommend it. Custom plugins make sense when your process has rules no plugin handles, when several plugins are fighting each other, or when you need something that becomes a real asset for your business.
Who owns the code?
You own the custom system built for your business after final payment, along with your data. Some projects reuse general building blocks we have developed in-house. Ownership terms are spelled out in your written scope so there is no question later.
How much does a custom system cost?
Custom business systems start at $5,000 and are scoped per project. Larger builds are often split into phases, each with its own fixed price, so you can start with the most important part and add more as the system proves itself.
Do you work with businesses outside North Carolina?
Yes. Purple Triangle is based in Raleigh, North Carolina and builds systems for clients across the United States and Nigeria, including the HerbalMatch product quiz for AdaBotanics. Projects run remotely with regular written updates and shared test sites.
Related services
Pair It With
Most clients connect two or three services. These fit naturally with custom systems. See all services.
Booking, Payments, and Customer Journeys
Online booking, deposits, and checkout connected to your site and your inbox.
Client Portals and Digital Service Delivery
A private login where clients see documents, messages, invoices, and progress.
AI and Business Automation
Reminders, follow-ups, and data entry that run on their own.
Next step
Have a Process That Needs Real Software?
Tell us how the work happens today. We will map it, propose a phased scope, and give you a fixed price for each phase.