The Website Replatforming Playbook: A Guide to Doing it Right the First Time

The short answer

• Replatforming projects rarely fail on technology. They fail when the team skips the upfront work on people, priorities, scope, rollout, and measurement.
• Answer six questions before kickoff: how the organization will work differently, how you will manage change, how you will decide on new requests, whether this is a lift-and-shift or a redesign, how you will roll it out, and how you will measure impact.
• This playbook is the "why" and "how to frame it". For the task-by-task list of what to do before, during, and after launch, use our replatforming migration checklist.

You finally got the green light to redesign. That moment when leadership approves your replatforming project feels like a huge victory. But it's also a high-risk and high-visibility project, and expectations for success are equally high.

Many times, despite your best efforts and intentions, eighteen months later you're over budget and behind schedule. Oops.

The difference between projects that deliver on time and budget and those that spiral into costly disasters isn't a lack of hard work or technical sophistication. It's almost always because the team didn't follow a proven methodology that addresses both the technology and the people side of transformation.

Our published client stories, such as Black Forest Decor and Custom Service Hardware (below), show what this process looks like in practice. This playbook reflects best practices we learned working with our client partners.

What this looks like in practice

Two of our migrations show the scale a well-framed replatform can absorb without disrupting the business.

Black Forest Decor. Black Forest Decor, Lone Star Western Decor, and Bella Coastal Decor moved "from BigCommerce to Shopify in just three months." The scope was broad: "The migration included products, customers, orders, reviews, content, SEO metadata, redirects, and third-party integrations." The published results include a "40% conversion rate increase across the 3 sites" and a project "delivered on time and on budget." Read the full Black Forest Decor story.

Custom Service Hardware. A BigCommerce to Shopify Plus migration for a specialty hardware catalog with complex B2B workflows: "More than 67,000 products and 70,000+ SKUs migrated," with "SEO preservation through comprehensive redirect planning and technical SEO execution." Read the full Custom Service Hardware story.

In both cases, scope, data, redirects, and integrations were planned as part of the project from the start rather than discovered at launch. That is what the six questions below are designed to surface.

Question 1: How Do You Prepare Your Organization for Cultural Transformation?

Here's what most teams get wrong: they treat replatforming like a sprint instead of a marathon. When the technical transformation is over, but the operations or commercial teams are not adequately trained and prepared, all that hard work is destined to fail.

Before you select your first vendor, ask yourself: when your new platform goes live, how do you envision your team using it differently? How will workflows and processes from the legacy systems need to change? The biggest replatforming failures happen when organizations spend months migrating to a new platform, only to use it exactly like the old one. You've essentially paid a premium to change nothing.

Common roadblocks include functional silos, fear of risk-taking, and lack of understanding of the value the replatforming project will bring. Address these upfront, or they'll derail your technical progress later.

Question 2: How Will You Manage the People Side of Change?

This is where good intentions meet reality. Without a proper change management plan, even the most technically sound and well-staffed migration can fail due to resistance, confusion, and misaligned expectations.

Start by identifying key executive champions who can remove obstacles and advocate for change when times get tough (it will happen at some point). Create clear documentation and briefs that outline business goals and set realistic expectations, for both optimistic and less optimistic outcomes, for before, during, and after the replatforming initiative.

Establish a way to communicate with key stakeholders to keep them aligned and maintain buy-in. Internal resistance can derail a transformation effort faster than any technical challenge, so plan for it.

Question 3: How Will You Balance Competing Priorities?

Replatforming projects attract feature requests like magnets attract metal shavings. Everyone from the employee level up to the C-suite will suddenly have ideas for improvements, new functionality, and "while we're at it" additions that can quickly derail your timeline and budget.

The key is establishing clear decision-making criteria upfront.

Create a simple framework that evaluates every request against your core business objectives. Does this feature directly support the goals you defined at the start? Will it measurably improve customer experience or business outcomes? Can you prove it with data, not just opinions?

When stakeholders come up with new ideas, and they will, you'll have objective criteria for saying yes or no. This isn't about stifling innovation; it's about staying focused on what actually matters for project success.

Question 4: Will This Be Lift-and-Shift or a Complete Redesign?

This decision significantly impacts the timeline, budget, and risk. Choose wrong, and you'll pay for it later.

A lift-and-shift approach involves moving the application to the new platform with minimal disruption to the user experience. It takes fewer resources, less time, and measuring impact should be cleaner.

A full redesign offers more transformation potential but introduces complexity, cost, and measurement challenges. Consider your organization's capacity for change and risk tolerance carefully.

Often, it's smart to use a phased approach. Start with replatforming, and add more value by improving the user experience in later phases or by use case, rather than trying to do everything at once.

Question 5: What's Your Rollout Strategy?

A "big bang" approach is tempting because it feels decisive. It's also precarious. And we don't recommend it for new functionality.

Splitting traffic or doing "canary" rollouts is popular for good reason. You roll out new functionality incrementally to small subsets, limiting the impact of defects or stability issues while allowing time to work out bugs before they affect your entire user base.

Consider strategies like brand-by-brand rollouts, segmenting customer channels and flows, breaking monolithic systems into components, or migrating page-by-page.

One tradeoff to plan for: if your URLs change, the rollout is also a site move in the eyes of search engines. Google's guidance on site moves and migrations is to map every old URL to its new URL, redirect with permanent server-side redirects, keep those redirects in place for a long time, and expect temporary ranking fluctuation during the move. The same guidance suggests moving the URLs of a small or medium site all at once, while larger sites can move in sections to make problems easier to isolate. Google also describes a permanent server-side redirect as the best way to send both people and Google Search to the right page.

Your approach should match your organization's maturity and competency levels.

Question 6: How Will You Measure Impact?

Any major digital initiative should have a robust monitoring and measurement strategy. This is critical for three reasons: establishing baselines to measure ROI, holding vendors accountable for performance, and rapidly identifying issues that impact customers and business before they become disasters.

Baseline your legacy experience before migration begins. Use hypothesis-based testing to anticipate which defects might cause customer journey friction. Implement real-time, automated analytics to deliver rapidly while minimizing defects as you roll out improvements. If URLs are changing, add search visibility to that baseline and watch the old URLs drop out of the index as the new ones are picked up.

Without proper measurement, you're flying blind. And that never ends well. A result like a conversion-rate lift can only be claimed when there is a pre-migration baseline to compare against and the numbers are tracked during and after replatforming.

Execute with Discipline, Not Hope

The replatforming projects that succeed aren't the ones with the biggest budgets or the flashiest technology. They're the ones led by a team that does the upfront work to prepare so the execution goes smoothly and is rolled out successfully.