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Treated as a platform purchase, the project risks carrying the same problems onto newer software. Treated as an operating-model and migration decision, it can shorten the time needed to launch a new site and reduce the number of places where one change has to be made, while protecting the URLs and search traffic the existing sites already earn. The published accounts below show several workable patterns, and they solve different problems.
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How do you consolidate 50+ websites onto one stack?
“One stack” is a set of shared layers, and each layer can be consolidated on its own schedule and to its own boundary. The table below sets out the layers and the first question to answer for each.
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|---|---|---|---|
| Content and product data | One content model and one master record per product or item | Local copy, regional prices, local availability | Which records must be identical on every site? |
| Templates and components | Shared components, templates and site setup | Local layouts and brand variants | Which elements repeat across enough sites to justify extraction? |
| Codebase | One codebase and shared configuration | Department or regional content | Do sites differ mainly by content, or by features that need code? |
| Instances | One installation where sites share a boundary | Separate instances where organisational boundaries require them | Which teams, brands, legal entities or workloads must be separated? |
| Permissions and workflow | Central roles, standards and approval rules | Local editing rights, languages and publishing | Who can create, edit, approve and publish at each level? |
Site counts grow for predictable reasons. Acquisitions bring in sites built on other platforms, as in the retail example below. Departments commission their own sites, as at Tulare County. Regions and countries add domains and languages: Umbraco reports one installation managing 52 sub-sites across 50 countries and 28 languages. Campaign sites accumulate outside any plan. Each reason creates a different kind of boundary, so the number of sites alone does not tell you what to consolidate.
#1 Best Overall
Start with the shared problem, not the platform
ITSUA, an acquisition-driven retailer, described its starting point in a 16 September 2026 article titled “How we consolidated 50+ retail sites onto one stack.” Its audit found old WordPress versions, varying plugin versions and inconsistent product entry across the acquired sites. The key finding was that central management tools for the separate installations did not fix the real gap, which was centralised product management. Its CSV-based process depended on developers and was hard to govern. The lesson is to name the shared problem before choosing software that appears to solve it.
Before choosing an architecture, answer these questions for every domain:
- Which content types, product or catalogue records, and transactional data must be identical everywhere?
- Who can publish, who approves, and which pages are local decisions?
- Which design elements must match the brand, and which may vary by market or department?
- Which security patching, hosting and disaster recovery responsibilities should sit centrally?
- Which integrations, such as commerce, search, analytics and CRM, are shared, and which belong to one site?
JBi Digital’s published audit of 52 regional domains (publication date not stated) is a useful model for this discovery work. Its scope covered:
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- local feature mapping;
- infrastructure and integration review;
- analytics review;
- content cleanup;
- SEO risks;
- preservation of high-value localised pages.
The audit ended in a two-year roadmap that assessed migration readiness by domain and risk.
Rank #2
Which architecture pattern fits?
The published implementations use four patterns. None is presented as the best option; each addresses a different boundary.
Central data with separate front ends
ITSUA’s proposed architecture holds product and content data in Strapi and runs an Astro front end for each site, built from reusable components and site cloning. The principle, in its words, is “One place for the data, many frontends.” ITSUA reports 50+ sites on the stack, with a new site taking up to a week where it previously took a month or more, and three to five new sites in good months. These are ITSUA’s own figures for its own process, not a controlled benchmark.
The business keeps Shopify Plus for selling and syncs product information from it into Strapi. “One stack” here is a connected set of services, not one product replacing every business system.
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One codebase with scoped permissions
According to a Hounder case study published by The Drop Times on 31 March 2026, Tulare County migrated more than 50 departmental websites from Mura CMS to Drupal, running on Acquia Site Factory. The sites share one codebase, shared configuration and reusable templates, while each department’s content stays separate. Role-based permissions limit authors to their own departments, and more than 300 authors are supported. Navigation was reorganised around what residents need to do rather than around department names.
Rank #3
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Hounder also reports page-load times of approximately 4.5–6.5 seconds before the migration and 0.7–1 second after it. These are internal measurements in an implementer-published account, not independently audited comparisons.
One installation with local and central roles
Umbraco’s published case study (publication date not stated) describes one installation managing 52 sub-sites across 50 countries and 28 languages, with more than 20,000 pages migrated. Shared architecture and design components sit under local editorial operation, with central and regional control. The account, which comes from the vendor and its partner, reports significant pre-migration problems in that estate, including a large URL count, indexing issues and difficulties with local autonomy. The useful lesson is that URL architecture, localisation, redirects, permissions and editor workflows need explicit design at that scale.
Separate instances where boundaries require them
ITSUA retains four instances across its 50+ sites for organisational reasons. Each instance is a separate upgrade, permissions and hosting surface, so the count should follow real boundaries rather than habit. The reported accounts do not establish an instance-size limit for a shared installation; the right count depends on your own boundaries and tooling.
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As a rule of thumb, the published examples point to four questions:
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- If one product or catalogue record must drive every site, centralise the data first, as ITSUA did.
- If sites differ mainly by content and share one feature set, a single codebase with scoped permissions fits, as Tulare County did.
- If many sub-sites share an editorial model and need regional control, one installation with local and central roles fits, as Umbraco reports.
- If a legal, organisational or security boundary separates sites, keep separate instances for that boundary.
How should we balance global control with local autonomy?
Decide the default for each decision area, then define the local exceptions and who approves them. JBi Digital’s stated governance principle pairs central standards with useful local flexibility. The published examples show how that works in each area.
| Decision area | Central default | Local exception |
|---|---|---|
| Content model and components | One definition, changed through a central process | Local components added only through an approval path |
| Product or catalogue data | One master record | Regional price, availability and copy |
| Publishing | Shared templates changed centrally | Local publishing rights scoped to a department or region (Tulare County) |
| Languages and domains | Shared locale structure | Regional control of domains (Umbraco) |
| Design | Shared design components | Local content within brand rules |
| Security and hosting | Central patching and hosting | Not stated in the reported accounts |
Make the boundaries testable:
- Build a role matrix with one row per role (central administrator, regional approver, departmental author) and columns for creating a site, editing shared templates, publishing and managing domains.
- Test each role on staging before go-live, including what happens when a local editor needs a component that does not yet exist.
- Record who owns each domain, so a domain move does not stall waiting for an unknown approver.
Assess migration complexity before choosing a wave
Migration is also data reconstruction. Tulare County’s move from Mura’s SQL database to Drupal used a custom pipeline. The team first reconstructed sample pages to see how GUID-linked pages, components and media fit together, then scripted extraction and transformation into Drupal entities, preserving media relationships. Hounder reports 7,228 pages and about 16,000 media files migrated, in the account published on 31 March 2026.
Score each site against these factors before scheduling it:
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- source-system diversity, including different CMS versions and plugin sets;
- data shape, such as nested pages, components and product variants;
- media relationships, including how many assets content actually links to;
- missing credentials for source databases, hosts or integrations;
- integrations that must be rewired;
- URL count and how traffic concentrates across it.
A low-risk migration sequence
- Inventory domains, URLs and integrations. Export URL lists for every domain, group them by section, locale and template, and flag pages with high traffic or high localised value.
- Map features and integrations. For each site, record which features are local, which integrations are shared, and which credentials you do not yet hold.
- Identify data relationships. Document how pages, components and media link to each other, and decide which relationships become structured fields in the new model.
- Choose a pilot wave. Pick a representative site or section. In ITSUA’s first migration, templates were ported without a redesign, so the architecture could be proven separately from visual change. Extract shared components only after you have seen the same pattern repeat across sites.
- Build the URL map before build. Every old URL needs a destination or a decision to retire it. The redirect rules are set out in the section on search traffic below.
- Validate content, permissions and workflows. Compare migrated item counts and media links against the source, and run a test publish for each role in your matrix.
- Monitor and remediate. Watch the search, log and analytics signals described below, and fix problems in the next wave rather than letting them accumulate.
- Retire legacy systems only after acceptance criteria are met. Define them in advance: content parity, redirect coverage, passed permission tests, agreed tolerances for traffic and indexing, and a rollback that has been tested.
How do you migrate multiple websites without losing SEO?
Google’s “Site Moves and Migrations” guidance in Search Central (page accessed 7 October 2026) is the reference for any change that affects domains, URL paths or hosts. Its core instruction applies directly to a multi-site consolidation: “Plan your changes to your site one after the other, not everything at the same time.”
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Google advises changing one major thing at a time. For a large estate, it suggests moving a smaller section first where feasible, to see how traffic and indexing respond. A small test may not reveal problems that appear at whole-estate scale. Google also recognises that search visibility can fluctuate temporarily during a move.
Apply these URL rules to every wave:
- Use permanent server-side redirects wherever possible, and keep redirect chains short so each old URL reaches its final destination directly.
- Do not send unrelated old URLs to one generic homepage. Where pages were genuinely consolidated, several old pages may redirect to the single relevant new page.
- Update internal links, canonical tags and hreflang annotations to the new URLs. In a multi-language estate, check the hreflang pairs across every domain that merges.
- Monitor Search Console reports, server logs, crawl errors and analytics for both the old and the new URLs throughout the move.
How do the platform options compare?
Compare options on service boundaries and operating burden rather than on brand. The published accounts used different platforms to solve different problems, so none of them shows that a particular product is the right choice.
| Axis | Question to answer | What the published accounts show |
|---|---|---|
| Central data model | Content only, or product, catalogue and transactional data too? | ITSUA centralises product and content data in Strapi. Tulare County and Umbraco describe content and templates; transactional data not stated. |
| Site and instance boundaries | Which teams, brands, legal entities or workloads need separation? | ITSUA: four instances for organisational reasons. Umbraco: one installation for 52 sub-sites. Tulare County: one codebase with departmental separation. |
| Local autonomy | Permissions, publishing, languages and domain ownership | Tulare County: role-based scoping for more than 300 authors. Umbraco: local and central operating roles. ITSUA: not stated. |
| Repeatability | Can non-developers launch a routine site? | ITSUA: reported launch-time improvement (figures above). Tulare County and Umbraco: reusable templates or shared components. Non-developer launches not stated for either. |
| Migration complexity | Source diversity, data shape, media, credentials, integrations, URL count | Tulare County: custom pipeline against a SQL database. Umbraco: a large URL estate. ITSUA: WordPress version and plugin variation. |
| SEO and user risk | URL mapping, redirects, hreflang, rollback | Umbraco: pre-migration indexing issues reported. Tulare County: navigation reorganised around resident tasks, which needs planning alongside URL mapping. Rollback plans not stated. |
| Operating cost and resilience | Licensing, hosting, patching, disaster recovery, support, exit | Tulare County runs Drupal on Acquia Site Factory. Cost and resilience figures not stated in the published accounts. |
How should you measure whether consolidation worked?
Set a baseline before the first wave and measure the same things afterwards. Useful measures include:
- Routine site launch time, from request to live, compared with your own pre-consolidation figure. ITSUA’s before-and-after is its own measure.
- Editor independence, meaning the share of routine launches and content changes made without a developer. ITSUA treats a non-developer being able to add a site as a practical test of whether the bottleneck has moved.
- Cross-site change effort, the number of separate edits needed to roll out one shared change.
- Incidents and patching, including how long a security update takes to reach every instance.
- Migrated URL and content quality, measured by redirect coverage, content parity against the source, broken media links and traffic retained on migrated URLs.
- Platform and operating cost, covering licensing, hosting, support responsibility and exit options.
None of the published accounts yields a transferable saving percentage, return on investment or engineering-effort estimate, so build the cost baseline from your own estate.
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