Ottsa
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New The modern WHMCS alternative

Billing & automation for hosting companies

Ottsa brings invoicing, provisioning, domains and support together in one platform. Built for web hosts, VPS providers, agencies and resellers, it includes every feature in a single license, places no limit on clients, and comes with a guided migration from WHMCS.

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14-day free trial · No credit card required · All features included

Works with the control panels, hypervisors, registrars and payment gateways you already use

cPanel & WHM Plesk DirectAdmin Proxmox VE Virtualizor Mollie Stripe PayPal Namecheap Enom ResellerClub CentralNic MaxMind Discord Slack

The complete platform

The entire customer lifecycle, from first order to every renewal

Retire the separate billing system, help desk, domain reseller panel and the spreadsheets that hold them together. Ottsa runs all of it from a single admin.

Recurring billing

Automated invoicing on any cycle from monthly to triennial, with prorations, late fees, and credit and debit notes for corrections.

Instant provisioning

Services are created, suspended, reactivated and terminated automatically as invoices are paid or fall overdue.

Domains

Registrations, transfers and renewals through the registrar you assign to each TLD, with cost prices imported and your margin applied.

Support desk

Departments, email import, escalation rules and a knowledge base, with every ticket linked to the client and the service it concerns.

Client area & checkout

A fully branded client portal and checkout, with configurable options, add-ons and self-service upgrades.

Payments & tax

Accept Stripe, PayPal, Mollie and bank transfer in the currencies you sell in, with VAT and regional tax rules built in.

Live reports

Track income, MRR, churn and tax alongside client, service and ticket figures, with every report exportable to CSV.

API & webhooks

A REST API, signed webhooks and a plugin SDK for connecting Ottsa to the rest of your stack.

Billing & invoicing

Get paid on time, every cycle

Ottsa issues invoices ahead of each due date, charges saved payment methods, follows up on late payments and suspends services that remain unpaid, all according to rules you define once.

  • Automatic card retries and payment reminders on your own schedule
  • Upgrades and downgrades prorated automatically
  • Account credit, refunds, quotes and proforma invoices
  • Multi-currency pricing, EU VAT and country-specific tax rules
  • Issued invoices are immutable, with corrections made through credit and debit notes
Explore billing

Provisioning

From checkout to a live service in seconds

Connect your control panels and hypervisors once, and Ottsa takes it from there, creating, upgrading, suspending and terminating services as invoices are paid or fall overdue, without manual intervention.

  • Built-in modules for cPanel & WHM, Plesk, DirectAdmin, Proxmox VE and Virtualizor
  • Server groups that place each new account on the server with the fewest accounts
  • Usage-based billing for disk and bandwidth overages on cPanel and DirectAdmin
  • Every module action logged, visible to your team and retryable
See all integrations

Support

A help desk connected to your billing

Every ticket is linked to the client and to the service or domain it concerns, so your team has the context to resolve issues quickly, and time spent on a ticket can be billed straight to the client.

  • Email import with departments and spam filtering
  • Escalation rules for tickets that wait too long for a reply
  • Predefined replies, internal notes and collision detection
  • Knowledge base, announcements and a network status page
Explore support
No per-client pricing

Grow to any size without paying more

Many billing platforms raise their license fees as your client base grows. Ottsa places no limit on clients, and a single license includes every feature, starting at $14.99 a month.

See pricing Compare with WHMCS

∞

Clients on every license

$0

Per-client or overage fees

0%

Cut of your payments

14

Day free trial, no credit card

Switching from WHMCS

Move from WHMCS without starting over

The importer reads your WHMCS data and produces a dry run you can review line by line before anything goes live. When you switch over, clients keep their services, due dates and invoices, and most can sign in with their existing password.

How migration works Read the migration guide

Who it's for

Built for every kind of hosting business

Shared & reseller hosting

Sell hosting plans across cPanel, Plesk and DirectAdmin servers, with accounts set up automatically once payment clears.

VPS & cloud providers

Configurable CPU, memory and disk options, provisioned on Proxmox VE and Virtualizor, on any billing cycle you offer.

Dedicated & bare metal

Stock-limited products, plus manual provisioning where there is no panel to connect.

Domain resellers

Import TLD pricing with your margin, assign a registrar to each TLD and send renewal reminders on your own schedule.

Agencies & MSPs

Bill hosting and maintenance plans alongside project work, tracked with tasks and timers at your hourly rate.

Game & app hosting

Build plans from configurable options and connect your own control panel through the plugin SDK.

FAQ

Frequently asked questions

Have another question? Send us a message.

Ottsa covers the same core areas as WHMCS: billing, provisioning, domains, support and the client area. The importer brings across your clients, services, invoices, domains and tickets. Custom WHMCS modules and hooks are rebuilt as Ottsa plugins, which we can develop for you as Enterprise work.
Ottsa is self-hosted. You install it from your browser on your own hosting, including standard shared hosting, without SSH, Composer or Docker. Your data stays on your server, and updates install in one click.
None at all. Every license includes every feature with unlimited clients, staff, services and domains, so a growing customer base never increases what you pay us.
Ottsa includes Stripe, PayPal, Mollie and bank transfer; cPanel & WHM, Plesk, DirectAdmin, Proxmox VE and Virtualizor; and ResellerClub, Enom, Namecheap and CentralNic Reseller. See the full integrations list. Other services can be connected through the plugin SDK or the REST API.
You begin with a dry-run import to check against WHMCS, run both systems side by side while you reconcile, then switch over on a date of your choosing. The timeline depends on the size of your data and the number of custom modules you rely on.
Yes. Use your own domain, logo, colors and email templates, and customize the theme when you need complete control. Your clients never see the Ottsa name.

Put your hosting business on autopilot

Try every feature free for 14 days on your own hosting. No credit card required.

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