The HostBill alternative with no module gates.
HostBill is a capable PHP billing platform built around modular paid add-ons. FluxBilling is a HostBill alternative built as a single SKU: the full billing engine in every plan, a visual plugin builder instead of compiled modules, and per-tenant Postgres-plus-Kubernetes isolation by default.
Every line, both products.
Where FluxBilling ships a capability in core, the row says In core. Where HostBill requires a paid add-on, the row says Module. Neutral rows are honest ties.
| Capability | FluxBilling | HostBill | Edge |
|---|---|---|---|
| Architecture | |||
| Frontend stack | React 18 SPA | jQuery + PHP templates | FB |
| Backend runtime | Bun | PHP 7.4 / 8.x | FB |
| Database | PostgreSQL 16 | MySQL / MariaDB | — |
| Tenant isolation | DB + K8s namespace | Single install | FB |
| Multi-region deploy | Native | Not built-in1 | FB |
| Pricing model | |||
| Base price | €4.95/mo (Lite) | $79+/mo | FB |
| Per-feature module gates | No | Yes1 | FB |
| Payment gateways | All in plan | Per-module pricing1 | FB |
| White-label | Add-on (any tier) | Higher tier | FB |
| Public source for plugin format | Yes (visual JSON) | Compiled PHP modules1 | FB |
| Provisioning | |||
| SolusVM 2 | Plugin (in box) | Module | — |
| Virtualizor | Plugin file (uninstalled by default) | Module | — |
| IPMI / Redfish bare metal | In core | Module | FB |
| Pterodactyl game server | Plugin (in box) | Module | — |
| cPanel / WHM | Plugin (in box) | Module | — |
| Plesk / DirectAdmin | Planned | Module | HB |
| Platform features | |||
| Built-in DCIM (rack, IPAM) | Yes | No1 | FB |
| Visual plugin builder | Yes | No1 | FB |
| Kanban task board | Yes | No1 | FB |
| Revenue analytics | In core | Add-on tier1 | FB |
| Operations | |||
| WHMCS importer | In core | Module | FB |
| EasyDCIM importer | In core | Not available1 | FB |
| HostBill importer | On request | — | — |
| White-glove migration | On request | Yes (paid) | — |
| Public roadmap | Yes | No1 | FB |
HostBill capabilities reflect publicly documented behavior on hostbillapp.com (captured 2026-05-11). Verify with the vendor before purchase decisions.
One tenant, one database, one namespace.
HostBill is a single PHP install with one MySQL database serving all clients of that license. FluxBilling runs each tenant inside its own Postgres database in its own K3s namespace, with per-pod CPU and memory limits set on the deployment. The blast radius of a bad query, leaked credential, or runaway worker is bounded to one customer.
- Per-tenant database
- Each customer environment runs in its own Postgres database, not a row-level multi-tenant table. A bad query, a runaway export, or a credential leak is bounded to a single tenant.
- Per-tenant Kubernetes namespace
- Backend, queues, and workers run in K3s namespaces with per-pod CPU and memory limits. One tenant’s billing run cannot starve another tenant’s API.
- Visual plugin model
- Integrations are JSON-defined visual flows traversed by a node-graph executor at runtime, plus a small set of typed base classes for the core interfaces. Plugin definitions are readable and editable in the admin UI.
- Hot-reload, no rebuild
- A new payment gateway is one plugin file. Save it, the GatewayRegistry hot-swaps. No restart, no core fork.
Visual flows, edited in the admin UI.
HostBill modules are PHP class extensions wired into core lifecycle methods. FluxBilling integrations are JSON-defined visual flows: a node graph that the runtime traverses to make API calls, transform data, and branch on conditions. Payment gateways, infrastructure provisioning, and notifications all use the same shape.
- Hot reload.Save a plugin file or edit the flow in the admin UI; the registry re-registers without a restart.
- One shape.Payments, hypervisors, registrars, notifications — every plugin uses the same node graph.
- Editable in-app.Operators without a code editor wire and tweak flows in the visual builder.
Honest about what ports and what does not.
No native HostBill importer ships in the admin panel today. Migrations are services-led: the team works directly with the source database and your install. The list below is what we have moved on real engagements.
When HostBill is still the right call.
HostBill ships more enterprise polish today: dedicated PMs, white-glove migrations from legacy systems, and a long catalog of paid modules built over more than a decade. If your hosting business is north of 5,000 customers, multi-region with a procurement team that prefers a vendor fitting a traditional enterprise license, HostBill is structured for that.
FluxBilling’s case is the modern stack and the price-flat single SKU. If your operation values per-tenant isolation, a JavaScript plugin model, and pricing that does not move with feature unlocks, the comparison stops being a polish question and becomes an architecture choice.
Common questions when migrating off HostBill.
- Why is FluxBilling cheaper than HostBill?
- FluxBilling does not gate features per module. Every plan ships the same feature set; you pay based on customer and server count. HostBill’s pricing covers a thinner core that unlocks features as paid modules. The base-line cost difference is the cost of those modules, not infrastructure savings.
- How is FluxBilling’s tenant isolation different from HostBill’s?
- HostBill is a single PHP install with one MySQL database serving all clients of that license. FluxBilling runs each tenant in its own Postgres database inside a Kubernetes namespace with per-pod CPU and memory limits. The blast radius of a bad query, leaked credential, or runaway worker is bounded to one tenant.
- Does FluxBilling have an importer for HostBill data?
- There is no out-of-the-box HostBill importer in the admin panel today. Migrations from HostBill are services-led: the team works directly with the source database and your install to bring over customers, services, invoices, and transactions. Open a ticket with the size of your install and the team will scope it.
- How does the plugin model compare to HostBill modules?
- HostBill modules are PHP class extensions that hook into the core via documented lifecycle methods. FluxBilling integrations are JSON-defined visual flows traversed by a node-graph executor at runtime — payment gateways, infrastructure providers, and notifications all use the same model. Definitions are readable and editable in the admin UI, and saving a plugin file re-registers it in the relevant registry without a restart.
- When is HostBill still the better fit?
- HostBill has more enterprise polish for very large hosting companies that want a vendor with dedicated PMs and white-glove migration. If your operation is north of 5,000 active customers, multi-region, with a procurement process that prefers a vendor that fits a traditional enterprise license model, HostBill is built for that. FluxBilling is leaner: SaaS pricing, public roadmap, single-product SKU.
- Is FluxBilling production-ready for European hosting providers?
- Yes. Pricing is in EUR, the billing engine handles per-country EU VAT rates with VIES VAT-number validation and reverse-charge logic, and EU-region deployments are the default. Data Processing Agreements are signed on contract. The platform was built with the EU hosting market in mind and runs production tenants today.
HostBill is a trademark of its respective owner. This page is not affiliated with, endorsed by, or sponsored by HostBill. All product names, logos, and trademarks are the property of their respective owners. Comparisons reflect publicly documented behavior on hostbillapp.com as of May 2026 and may not include unreleased changes. Verify with the vendor before purchase decisions.