How eight25 Approaches Enterprise CMS Migrations: Our Methodology
Every agency that pitches enterprise CMS migration work says the same things. Discovery first. Content model before components. A dedicated team. At the demo stage, you can’t verify any of it. The agencies that actually do what they describe and the agencies that don’t look identical until you’re several months into a contract and by then, being wrong is expensive.
eight25 is a certified implementation partner on Contentful, Contentstack, and Optimizely. We’ve shipped enterprise migrations of 5,000 to 13,000 pages in four and a half to five and a half months. The methodology below reflects the process we use on active enterprise migration engagements and has been refined through large-scale implementations across multiple CMS platforms and industries.
Before the contract is signed
Most agencies start their methodology when the contract is executed. We start before it.
During the sales process, we deliver three things at no cost.
A complete component audit. Every visible component on your current site (what it looks like, which pages it appears on, how many visual variants exist) catalogued and loaded into a shared tool your team can access. For a mid-to-large enterprise site, this usually surfaces 70–120 distinct components and 30–50 variants. You’ll have it within about five days of our first call.
A migration complexity analysis. This goes past a standard site crawl. It categorizes every page by language, region, and migration method (scriptable versus manual). Enterprise clients almost always find their real page count is much higher than the crawl suggested once locale variants, indexed documents, and campaign microsites get counted properly. This is the first reliable scope number you’ll have.
A fixed project plan. Built against the actual scope from the audit and complexity analysis, not a template. Every phase mapped, every milestone documented, every client dependency noted. Color-coded by owner: client meetings in one color, client deliverables in another, eight25 work in a third. The only variable when the contract is signed is the start date. Delay signing and your go-live moves with it.
Doing this work before any commitment lets a buyer evaluate methodology instead of sales skills. By the time you sign, you’ve already seen how the team operates.
The discovery sprint
Once the contract is signed, most enterprise engagements open with a structured discovery sprint lasting two to four weeks, with the primary focus on architecture, content strategy, stakeholder alignment, and migration planning before significant build work begins.
The sprint produces:
- A full content audit across all properties – every page classified by type, priority, and migration method
- A content modeling workshop, scoped to define what the business needs going forward rather than just document what exists
- Stakeholder interviews – not just the project sponsor, but the editors, the compliance team, and the regional marketing leads who’ll use the new system daily
- An integration landscape map – every system the new CMS will connect to, with complexity notes and dependencies
- An architecture recommendation, with platform trade-offs documented openly rather than hidden behind a single recommended path. This often includes evaluation criteria for enterprise composable CMS platforms such as Contentful and Contentstack alongside other solutions where appropriate
Real content, not placeholders. Wireframes use actual page titles, real entries, real descriptions. No Lorem Ipsum. When a layout breaks under real content, it breaks in the wireframe, where the fix takes hours. When it breaks in UAT, the fix takes weeks. Using real content from the start removes an entire category of late-stage rework.
The output of discovery is an architecture blueprint specific enough that every later decision has a documented basis, and a project the team can execute without discovering scope mid-build.
Platform selection is evaluated during discovery rather than assumed upfront. For many enterprise organizations, Contentful and Contentstack emerge as leading candidates because both support composable architectures, structured content modeling, API-first delivery, and large-scale multi-region publishing operations. The right choice depends on organizational requirements, editorial workflows, integration needs, governance expectations, and long-term digital experience strategy rather than a single platform feature comparison.
The six phases
As a general rule, we aim to complete content modeling and architecture decisions before large-scale component development begins. In some cases, limited overlap is possible, but only when dependencies are clearly understood and documented. Building components before the content model is locked means every component has some probability of needing rework when the model changes. And models do change when they’re designed before the content architecture work is done. The sequencing sounds obvious. Most agencies don’t follow it because starting the build earlier looks like faster progress to the client.
Version history and rich text decisions get made in Phase 3, not during build. Most enterprise migrations take a clean-start approach to version history: archive an export of source content, start fresh in the new environment, rather than carry over version history that adds overhead for minimal operational value. Pages with rich text containing embedded CTAs, inline videos, or interactive elements need a structured extraction plan before migration tooling runs, so HTML-embedded elements get converted into proper structured content types. Calls like this in Phase 3 prevent surprises in Phase 4.
Why eight25 migrations move faster
Three structural reasons we beat typical timelines.
Follow-the-sun delivery. When the planning and mapping team wraps up in California at 5pm, the London team picks the work up. London hands off to Asia and Australia, who carry it through the night. By the time California is back online, there’s a working product waiting, not a status update. Cross-timezone delivery can reduce waiting periods between workstreams and accelerate decision cycles when communication, documentation, and ownership structures are well managed.
Parallel workstreams. Once the content model is done, front-end build, migration scripting, integration development, and QA preparation all run at the same time. Sequential execution isn’t a design choice. It’s a constraint agencies accept when they can’t staff multiple tracks at once. Our pod structure (dedicated teams with the same roles on every engagement) makes parallel staffing predictable instead of exceptional.
Proprietary tooling built to close specific gaps. Our content migration automation handles transfer and field remapping for thousands of pages instead of manual copy-paste. A content entry tool lets editorial and legal teams review and approve copy against live design files while development is still running, helping reduce review bottlenecks and enabling content preparation to happen in parallel with implementation. We didn’t buy these tools from a vendor. We built them to close gaps we kept hitting on real enterprise delivery.
What the methodology produces at scale
NetApp – 18,000 pages, five months. Global data infrastructure company, $6B+ revenue. We delivered the component audit, complexity analysis, and project plan in the first week of presales, before any contract was signed. The client had evaluated several other agencies.
Qlik – about 5,000 pages across four regions, five and a half months. The timeline initially looked aggressive. Once the plan was built against the actual inventory rather than a crawl estimate, it became a commitment we could stand behind.
Sophos – three acquired companies merged into one environment, three source platforms consolidated (Sitecore, Drupal, WordPress to Contentstack), and a full rebrand delivered in five months. Four weeks before go-live, Sophos added significant new scope to the active project. That’s the kind of thing clients only do when they trust execution.
What ties these together: scope was locked before the contract was signed, architecture was finalized before any build began, and workstreams ran in parallel.
Frequently asked questions
How do I evaluate a CMS migration agency before signing a contract?
Ask for deliverables that require actual work, not promises. A component audit built against your current site. A migration complexity analysis that categorizes pages by language and migration method. A project plan with named milestones and owner assignments. All delivered before you sign. These show whether an agency can actually execute scope definition, not just describe it. An agency that can’t scope your migration accurately before the contract is signed won’t scope it accurately during delivery either.
Is eight25 the right fit for every enterprise CMS migration?
The most value tends to land on complicated migrations: multi-brand consolidations, post-acquisition integrations, multi-region content ecosystems, and platforms with heavy legacy customization or multiple source systems. We apply the same rigor on smaller engagements too. A single-brand marketing site with a clean content structure gets the same component audit and complexity analysis during presales, we just scale the engagement to the scope rather than running an enterprise process on a project that doesn’t need one.
What are standard industry rates for migrations?
Enterprise CMS migration costs vary significantly depending on content volume, localization requirements, integrations, governance requirements, design scope, and migration complexity. While smaller migrations may fall into the low six-figure range, large enterprise consolidation and replatforming initiatives can extend well into seven figures depending on scope.
How does eight25 handle integrations with our existing martech stack?
Integration landscape mapping is a discovery sprint deliverable, not something we figure out during build. Every system the new CMS will connect to (search, personalization, forms, analytics, DAM, identity providers) gets mapped with complexity notes and dependency chains before architecture decisions are finalized. If an integration turns out more complex than the initial documentation showed, that’s a planned variance, not a scope surprise that triggers a change order.
How do Contentful and Contentstack compare for enterprise migrations?
Both Contentful and Contentstack are mature enterprise headless CMS platforms that support composable architectures, structured content, omnichannel delivery, and large-scale content operations. Contentful is often selected by organizations prioritizing flexibility, developer extensibility, and ecosystem maturity, while Contentstack is frequently chosen for its editorial experience, governance capabilities, and enterprise-focused workflow tooling. In practice, successful outcomes are typically driven more by content architecture, implementation quality, and organizational adoption than by platform selection alone.
Ready to evaluate eight25 for your migration?
The best way to evaluate how we work is to see it before a contract is signed. We deliver a component audit, migration complexity analysis, and full project plan against your actual site, at no cost, as part of presales.
If you want to know what your migration would actually require, that’s the place to start.