Custom WHMCS & Blesta development
New modules, integrations and adjustments to existing ones - built to order for your hosting business. We specialise in OpenStack, Proxmox, SolusVM, Vultr, DigitalOcean and Hetzner, and integrate anything with an API.
Platforms, clouds & gateways we integrate
What we build
From one-off integrations to complete automation suites - if your billing platform needs it, we can build it.
Provisioning and billing for OpenStack, Proxmox, SolusVM, Vultr, DigitalOcean and Hetzner - our core specialisation.
See our specialisations →Automated account creation, suspension, upgrades and termination for any control panel, virtualisation platform or in-house API.
Learn more →Any payment processor - cards, bank transfers, crypto or local methods - with refunds, callbacks and reconciliation handled.
Learn more →Domain registration, transfers, renewals, DNS and WHOIS management for any registrar or reseller API - fully automated.
Learn more →Client-area features, admin tooling, reporting dashboards and workflow automation built directly into your billing panel.
Learn more →We extend, fix and modernise modules you already use - new features, action hooks, bug fixes and compatibility upgrades.
Learn more →Pricing
Every project is quoted individually, but these starting points give you an idea. No hourly billing, no surprises - and launch discounts are active right now.
$99 from $59 -40%
$499 from $349 -30%
custom quote 10% off prepaid
Maintenance plans from $29/mo keep your modules compatible with new WHMCS and Blesta releases - monitoring, updates and priority fixes included.
Our specialisations
Selling cloud and VPS through WHMCS or Blesta is what we do best. We connect your billing panel directly to the platforms you run - from instance creation to usage invoicing.
$ openstack project create client-1042 --domain default
$ openstack quota set client-1042 --cores 16 --ram 65536
$ openstack server create web-01 --flavor m1.large \
--image ubuntu-24.04 --network client-net
$ openstack metric measures show cpu \
--resource-id 7f3ac2e1 --aggregation rate:mean
$ openstack usage show --project client-1042 \
--start 2026-05-01 --end 2026-06-01Platforms
We work with both major hosting billing platforms every day. Whether you run the industry-standard WHMCS or the developer-friendly Blesta, we know the module APIs, the hooks, the quirks - and how to make them work for your business.
<?php
// Custom provisioning module
function yourmodule_CreateAccount($params) {
$api = new YourCloudApi($params);
$api->deploy([
'plan' => $params['configoption1'],
'region' => $params['configoption2'],
]);
return 'success';
}How it works
Send us your requirements - the platform, the API you want integrated, and how it should behave. We'll ask the right questions.
You get a clear scope document, a fixed price and a delivery date. No hourly surprises, no scope creep.
We build your module with clean, documented code and show you working previews along the way.
You receive the full source code, installation docs and 30 days of free bug-fix support after launch.
Why custom
Marketplace modules are fine until your workflow doesn't fit theirs. Here's what changes when it's built for you.
| Off-the-shelf module | Custom by ModuleCustoms | |
|---|---|---|
| Fits your exact workflow | Rarely - you adapt to it | Built around your process |
| Source code access | Often encrypted (ionCube) | Always - you own it |
| Feature requests | Vendor roadmap decides | Scoped and delivered for you |
| Recurring license fees | Monthly or yearly, forever | One-time build cost |
| Support | Ticket queues, best effort | Direct line to the developers |
Why ModuleCustoms
No black boxes, no hourly surprises - just clean code and clear communication.
Every delivery is unencrypted, documented source code. No licensing locks, no vendor dependency.
You approve a written scope, a fixed price and a delivery date before any work starts.
30 days of free bug-fix support on every project, with affordable maintenance plans after.
Client feedback
"
They connected our Proxmox cluster to WHMCS with full lifecycle automation. Orders that took 20 minutes of manual setup now deploy themselves.
"
The payment gateway module for our local bank works flawlessly - callbacks, refunds, everything. Clean code our own devs can read.
"
We moved from WHMCS to Blesta and they ported our custom modules without losing a single feature. Smoothest migration we've done.
FAQ
Yes. Every project is delivered unencrypted with full source code, and you own the rights to the work we deliver for you.
OpenStack, Proxmox VE, SolusVM, Vultr, DigitalOcean and Hetzner - full provisioning and billing integration with WHMCS or Blesta. We also integrate any other platform with a usable API.
Yes. We regularly extend, fix and modernise existing WHMCS and Blesta modules - adding features, fixing bugs and restoring compatibility with new platform releases.
We target the current stable release of each platform and can build for specific older versions on request. We also update legacy modules to work with new releases.
Small hooks and fixes take 1–3 days. A typical provisioning, registrar or gateway module takes 1–3 weeks depending on the API complexity. You'll get a firm date with your quote.
Every project includes 30 days of free bug-fix support. After that, we offer affordable maintenance plans or per-incident fixes.
Yes - we're happy to sign your NDA before you share any project details, API credentials or business logic.