If your stack is cPanel you have many options. If it is Proxmox, SolusVM, OnApp or bare metal, the shortlist narrows, and it narrows differently depending on which edition you buy.
Mario Marin6 min readA hosting billing platform is only as useful as its ability to talk to the thing that actually creates the service. If your stack is cPanel and DirectAdmin, almost every platform in this category will serve you. If it is Proxmox, SolusVM, OnApp, CloudStack or bare metal, the shortlist narrows fast — and it narrows differently depending on which edition you buy.
This is a survey of what each vendor publishes about control panel and hypervisor support, read from vendor documentation and pricing pages on 18 August 2026.
How this was sourced. FluxBilling publishes this comparison and sells one of the products in it; sources are linked at the end. Module catalogues change constantly and third-party developers publish integrations that no vendor page lists, so treat this as a map of what the vendors themselves document, not a complete census. Where a vendor's documentation does not distinguish bundled modules from separately obtained ones, this post does not either — it says what the page says.
Part of the FluxBilling guide to WHMCS alternatives for hosting providers.
WHMCS's server module documentation covers 25 modules: Ahsay Backups, Auto Release, Centova Cast, Cloudmin, cPanel, DirectAdmin, Enom SSL, FreeRADIUS, GlobalSign SSL, Helm, Helm 4, HyperVM, InterWorx, Plesk, Reseller Central, ResellerClub SSL, SCPanel, SolusVM, TCAdmin, Virtualizor, Virtualmin Pro, VPS.net, WebsitePanel, WHMSonic and WP Squared.
That documented set is only part of the picture. The larger part is the third-party ecosystem: WHMCS has been the category default long enough that most control panel, hypervisor and registrar vendors publish a WHMCS module as a matter of course, and independent developers publish extended versions of the bundled ones. If your requirement is an unusual integration, WHMCS is the platform most likely to already have it, and that remains its strongest single advantage over everything else in this post.
HostBill is the clearest case in the category because its pricing page states exactly which integrations sit in which edition. That transparency is genuinely useful and it is also where the cost lands.
| Edition | Price | Integrations included |
|---|---|---|
| Startup | $599 | cPanel, Plesk, DirectAdmin, DigitalOcean, Lightsail, Linode, Vultr, Hetzner Cloud, upCloud, plus one SSL module |
| Enterprise | $999 | Startup, plus PowerDNS, SolusVM, Proxmox, OnApp, OpenStack, CloudStack and the IPAM app |
| Data Center | $1,599 | Enterprise, plus R1Soft, Ahsay, DCI Manager, Noc-PS, Cacti, Observium, LibreNMS, vCloud Director, Acronis, freeRADIUS, and the Colocation, Inventory, Password Manager, Status Updates and Staff AD/LDAP apps |
| All-Inclusive | $5,999 | All available integrations — HostBill's page cites 106+ — and all apps |
Read that table before you get quoted the entry price. A shared-hosting reseller on cPanel is served by the $599 edition. A VPS provider on Proxmox or SolusVM needs Enterprise at $999. A colocation provider needs Data Center at $1,599. The headline price and the price of a working configuration are two different numbers, and the gap is $400 to $1,000.
Both publish module and extension systems covering the mainstream control panels, and both are extended by third-party developers — several module houses publish for WHMCS, Blesta, WISECP and Clientexec from the same catalogue. Neither vendor gates integrations behind a higher price tier the way HostBill does; their tiers vary by branding and licensing terms rather than by feature access, which is a simpler model to buy against.
Because neither publishes a definitive per-module list on its pricing page, this post does not print a count for either. If a specific hypervisor is load-bearing for you, confirm it with the vendor rather than with a comparison table — including this one.
Upmind publishes its provisioning layer as open source on GitHub for developers to extend, while the core platform remains a hosted service. That is a different answer to the same problem: rather than shipping a large catalogue, it makes the integration surface public. Whether that suits you depends on whether you have someone who will write the integration.
Our published catalogue is small and we would rather state the number than imply a bigger one. FluxBilling currently publishes six infrastructure provider integrations: cPanel/WHM, Proxmox VE, SolusVM2, Virtualizor, Pterodactyl and eNom for domain registration. Alongside those are fifteen payment gateway plugins and notification integrations for Discord, Slack and Telegram.
Plesk, DirectAdmin, OnApp, CloudStack and OpenStack modules do not ship today. If any of those is how you provision, HostBill's Enterprise or Data Center edition or WHMCS's ecosystem will serve you and we will not, and that is the correct recommendation rather than a reason to stretch a comparison.
Two things do differ structurally. Every integration is available on every tier — from Lite at €4.95/month upward — so there is no edition to clear to reach a hypervisor. And integrations are built with a visual plugin builder rather than as PHP modules, which means an API-driven provider that nobody has written a module for can be wired up without shipping code. Bare-metal provisioning, rack management, hardware inventory and IPAM are also on every tier rather than being a separate product.
See the plugin catalogue, provisioning, the plugin builder and current pricing.
Forget catalogue sizes. Write down the four or five systems you provision from today, then check each shortlisted platform against that list specifically — and check which edition or tier the integration lives in. A platform with 106 integrations that puts yours in the $1,599 edition costs $1,599. A platform with six integrations that includes yours costs the entry tier. Catalogue size is a proxy metric; your actual stack is the requirement.
Then ask the second question, which is what happens when the integration is not there. On WHMCS you write a PHP module or buy one. On HostBill you buy the edition that contains it, or commission it. On FluxBilling you build it in the plugin builder if the provider has an API. Those are meaningfully different amounts of work and cost, and the answer only matters if the first list came up short.
All product names are trademarks of their respective owners. This comparison is published by FluxBilling for evaluation purposes and is not endorsed by, affiliated with, or reviewed by any of them.
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A thousand customers paying four euros is a different billing problem from forty paying four hundred. Per-client pricing, support load and involuntary churn decide this segment, not feature counts.