Several sites, one installation, shared governance.
WordPress Multisite running several affiliate or brand sites from a single installation: shared infrastructure and a shared component library, with each site retaining what genuinely needs to stay independent.
Running many separate WordPress installations for a multi-market group multiplies maintenance overhead: each one updated, secured and hosted independently. Multisite consolidates that overhead while still letting each site have its own content and, where needed, its own theming.
A multisite architecture with shared core and per-site content, a component library available to every site, network-level administration for global oversight, and per-site permissions for local teams.
We weigh Multisite against separate installations before recommending it — where sites genuinely need to be technically independent, different hosting requirements, very different functionality, we say so upfront rather than forcing everything into one structure that will fight you later.
The scope our WordPress Multisite work has operated within.
Multisite fits some situations well and others poorly. WordPress Multisite starts from that fit.
What comes up when considering a shared network.
It depends heavily on how functionally similar the sites are to each other in practice. Similar sites benefit from shared infrastructure and a single Multisite install, while very different sites are often better served as separate installations, and we would tell you which fits before building either option.
Yes, within the shared component system that Multisite depends on for maintainability. See design systems for how theming variation is typically structured across a network — each site can carry its own colours, imagery and market-specific components, while shared functionality like forms and navigation logic stays consistent underneath so updates only need to happen once.
Shared infrastructure means a network-level issue, such as a database problem or a faulty plugin update, can affect every site on the installation at once, which is a real trade-off against the maintenance savings Multisite otherwise provides. We design for resilience with staged updates and monitoring, but this shared-risk profile is worth weighing against your uptime requirements upfront.
Yes, that is one of Multisite’s main advantages over separate installations. Adding a new market or brand becomes a configuration task on existing infrastructure, reusing the same plugins, theme and hosting environment, rather than commissioning a new build from scratch. The new site can still carry its own design and content independently of the others already running.
WordPress Multisite connects closely with these related technology pages.
Several sites currently maintained separately with real overlap in requirements. Tell us your sites and we will tell you whether WordPress Multisite fits.