WHMCS vs open-source alternatives: what really changes in billing costs

Anyone billing their hosting clients through WHMCS already knows the drill: the subscription fee goes up again in January. The price list published by the vendor, valid from 1 January 2026, confirms the tiered table based on the number of active clients: Valid from Jan 1st, 2026, up to 250 clients $34.95/mo, up to 500 clients $54.95/mo, $84.95/mo for the first Business tier up to 1,000 clients. It then climbs as high as $1,999.95/mo for the Business Unlimited tier.

Compared with 2025, the increase is across the board: Plus goes from $29.95 to $34.95/month, Professional from $44.95 to $54.95/month, Business 1000 from $69.95 to $84.95/month. This isn't an isolated case: in the same October 2025 announcement, a user on the official WHMCS community forum pointed out that it's the same story for every single WebPros product, including cPanel, Plesk, SolusVM and Comet Backup: all of them are getting another annual price rise. WHMCS responded by justifying the move as a way of giving advance notice: the price change was announced on 14 October 2025, effective from 1 January 2026.

The open-source alternatives: what they really cost

FOSSBilling is the name that comes up most often among resellers looking for a way out. It's a free project: FOSSBilling provides all the tools needed to manage clients, automate billing and provision services, with automatic invoicing, provisioning on cPanel/Plesk/DirectAdmin/HestiaCP, domain management and integrated ticketing. It's licensed under AGPL 3.0: you can inspect the code, contribute features or fork it, with no encoded files or hidden secrets. The licence cost is zero. The real cost lies elsewhere: there's no commercial support included, updates are handled by whoever administers the server, and if a bug crops up or a payment module turns out to be incompatible, the solution is to open an issue on GitHub or tackle the code yourself.

Blesta sits somewhere in between: it's a commercial product, but with a different licensing model from WHMCS. You can pay monthly, starting from $17.95/month for the Branded version, or buy a one-off licence: Owned Branded $350 one-off, with support and update renewals at $62/year after the first year, which is optional. There's also a Lifetime licence at $1,295 that includes all future updates with no recurring fee.

The table that matters

Solution	Licence	Indicative cost (250 clients)	Maintenance/updates	Migration from WHMCS
WHMCS Plus	Proprietary, subscription	$34.95/month	Included in the fee	—
Blesta Owned Branded	Proprietary, one-off purchase	$350 one-off + $62/year (optional from year 2)	Optional paid support	Paid service, standard $200
FOSSBilling	Open source AGPL 3.0	$0	Handled by the server administrator	No official service, must be done in-house

What it means for those who have to choose

The WHMCS fee is predictable, but it rises every year: from 2025 to 2026 the increase across the main tiers ranges from $5 to $300 a month depending on the bracket. FOSSBilling zeroes out the "licence" line item, but shifts the cost to another budget line altogether: time. Updates, security patches and compatibility with payment modules become in-house work rather than a fee paid to someone else. Blesta is the option for those who want to step off the monthly subscription treadmill without giving up support: with the lifetime licence you pay once and decide for yourself whether to pay for update renewals.

For those managing a few dozen clients, the difference between WHMCS's $34.95/month and FOSSBilling's zero cuts into the margin. For those managing thousands, the figure to watch is the jump between Business tiers: from 1,000 to 2,500 clients, the WHMCS fee rises from $84.95 to $179.95 a month.