SaaS Commerce
SaaS commerce (Software-as-a-Service ecommerce) refers to platforms that host your store on their own infrastructure, handle platform maintenance and security, and charge you a monthly subscription fee for access. Shopify, BigCommerce, Wix Commerce, and Squarespace Commerce are all SaaS platforms.
The defining characteristic is ownership versus tenancy. On a SaaS platform, you’re renting a storefront. You don’t own the server, the software, or the checkout infrastructure. The platform does — and they’re responsible for keeping it running, secure, and compliant with payment-card industry standards (PCI DSS).
What SaaS commerce gives you
- Managed infrastructure: No server administration, no PHP version conflicts, no security patching. The platform handles it.
- Hosted checkout: PCI-compliant payment processing built in. You don’t need to build or maintain a secure checkout; you use the platform’s.
- Automatic updates: Platform improvements deploy without you initiating anything. A new Shopify feature appears in your admin after the platform update, not after you run a plugin update.
- Guaranteed uptime SLAs: Shopify’s 99.98% uptime SLA means Black Friday traffic spikes are the platform’s problem to absorb, not yours.
The cost of tenancy
SaaS commerce costs more in ongoing fees than self-hosted alternatives — but it eliminates the maintenance overhead that self-hosted platforms (WooCommerce, Magento) require.
| Platform | Monthly SaaS fee | What you avoid vs self-hosted |
|---|---|---|
| Shopify Basic | $39/mo | ~£800–£1,500/yr in hosting + maintenance |
| BigCommerce Standard | $39/mo | ~£800–£1,500/yr in hosting + maintenance |
| Wix Commerce Business | $29/mo | ~£500–£1,200/yr in hosting + maintenance |
| Squarespace Basic Commerce | $27/mo | ~£500–£1,200/yr in hosting + maintenance |
The SaaS premium is real. So is the maintenance burden it eliminates.
SaaS commerce vs self-hosted — choosing
The decision framework is simple:
- Developer access available? Self-hosted (WooCommerce, Magento) is cost-competitive once you account for maintenance.
- No developer access? SaaS eliminates entire categories of risk — plugin conflicts, security incidents, server-level performance issues — that self-hosted requires active management to prevent.
- Need full customisation control? Self-hosted is the only option.
- Need to launch quickly? SaaS wins on setup speed.
See also: Self-hosted commerce · Headless commerce · Hosted checkout · Shopify review · BigCommerce review