Shopify Redesign or Migration: How to Make the Right Choice for Your E-commerce?

Your online store is stagnating. The conversion rate is flat, maintenance costs are rising, and every new feature becomes a project. Faced with this situation, two paths are open to you: rebuild your current site by adding CRO optimizations, or migrate to Shopify to start on a more solid foundation. It's not the same decision. It's not the same budget. And above all, it's not the same level of risk.

Yet, this is a question our clients at Stellar Projects ask us several times a month. And honestly, there's no universal answer. But there is a rigorous thought process that allows for arbitration. This is what we will give you here, without mincing words.

Redesign or migration: understanding what's truly at stake

Confusion often comes from a poorly phrased question. "Should I rebuild my site?" is not the right question. The right question is: is my current CMS capable of supporting the growth I'm aiming for?

A redesign involves rethinking the user experience, design, content, and sometimes the architecture of an existing store, without changing platforms. It often comes with a CRO (Conversion Rate Optimization) approach to maximize return on investment. It's a surgical operation on what already exists.

A migration, on the other hand, means changing foundations. You leave your current CMS (PrestaShop, WooCommerce, Magento, Wix, or other) for Shopify. You don't retouch the walls; you change the building. It's more demanding, riskier in the short term for SEO, but often more profitable in the medium term if your original platform is structurally limiting.

These two options are not interchangeable. Confusing them means either spending money to optimize a condemned system or embarking on a major project when a simple CRO audit would have sufficed.

Diagnosing your current platform

Before any decision, an honest diagnosis is required. Not a feeling, not a fleeting frustration: data. Here are the four dimensions to evaluate.

Technical performance

Test your site on Google PageSpeed Insights. A Core Web Vitals score below 60 on mobile is a serious warning sign. According to Google data (2024), 53% of mobile users abandon a site that takes more than 3 seconds to load. If your score is degraded and your current CMS does not allow you to improve it structurally, it's a strong argument for migration.

Functional scalability

List the 5 features you want to add in the next 18 months. For each, ask your current developer for an estimate. If the answer totals more than €20,000 for custom development for features native to Shopify (subscriptions, B2B, multi-currency, extensible Checkout, etc.), migration becomes more economically attractive.

Total Cost of Ownership (TCO)

Calculate your annual TCO on your current CMS: hosting, preventive maintenance, security updates, modules, corrective developments. For PrestaShop and WooCommerce, in particular, this figure is often underestimated. A moderately complex PrestaShop store costs between €3,000 and €8,000/year in maintenance. Shopify, a SaaS platform, includes hosting, security, and updates in its monthly subscription (starting from €36/month for the Basic plan).

CRO capability of your current theme

Some themes or CMS make conversion optimization structurally complicated. If you can't freely modify the product page, checkout, cross-sells, or if each A/B test requires ad hoc development, you're working against yourself. Shopify, via its Checkout Extensibility and the ecosystem of certified apps, is currently the most open platform for CRO without heavy development.

When a redesign with CRO is the right decision

Redesigning your site on your current CMS is the right option when the platform is not the problem. Here are the concrete signals that point in this direction.

You are already on Shopify

If your store is running on Shopify and performance is disappointing, migration makes no sense. The problem lies elsewhere: unsuitable theme, lack of CRO, poor catalog architecture, neglected SEO. A redesign of your Shopify store focused on UX and conversion can yield quick results, often within 6 to 10 weeks.

Your CMS works well technically

If your PageSpeed scores are good, if your team masters the platform, if maintenance costs are reasonable... then changing CMS would be creating unnecessary problems. Focus investment on optimizing the conversion funnel: product pages, checkout, transactional emails, upsells.

The budget is constrained

A targeted redesign on an existing store generally costs between €5,000 and €15,000 depending on the scope. A CRO audit followed by targeted optimizations can start from €2,000 to €3,000 and generate a rapid ROI (often 3 to 6 months). If your cash flow does not allow you to absorb a migration project over 3 to 5 months, progressive redesign is a sensible strategy.

Your current SEO is strong

If you rank well for your strategic keywords, any migration carries a risk of temporary SEO regression, even if well prepared. It's better to consolidate the existing rather than take this risk unnecessarily. Exception: if your CMS is structurally detrimental to SEO (Wix, some very heavy versions of Magento), migration can ultimately improve natural referencing.

When migration to Shopify is essential

Migration is the right decision when your current CMS has become a glass ceiling for your growth. Here are the six situations where it is clearly essential.

Your CMS is end-of-life or structurally limited

PrestaShop 1.6, Magento 1, certain versions of WooCommerce with an aging plugin ecosystem: these platforms accumulate technical debt that only increases. Each update becomes a risk. Each new development costs more than it should. Migrating to Shopify means liquidating this debt all at once.

You suffer from regular bugs and outages

Production errors, incompatibilities between modules, outages during peak load periods (sales, Black Friday)... These symptoms indicate a fragile architecture. Shopify, as a SaaS platform with a distributed infrastructure, guarantees 99.99% availability and handles traffic spikes without additional configuration.

You want to accelerate multi-channel and international expansion

Shopify Markets allows you to manage multiple countries, currencies, and languages from a single interface, without multiplying stores. If your ambition is international, this native functionality alone can justify the migration. The equivalent configuration on PrestaShop or WooCommerce is significantly more complex and costly.

Your team wastes time on administrative tasks

If your e-commerce manager spends several hours a week dealing with bugs, waiting for developers for minor modifications, or juggling a dozen poorly integrated modules, calculate the cost of this loss of productivity over a year. This is often more than the cost of migration.

You need advanced native features

Shopify Plus (starting from €2,300/month) offers natively: B2B with dedicated catalog and pricing, extensible Checkout, advanced automations (Flow), multi-store, and simplified ERP/OMS integrations. For brands exceeding €1M in e-commerce revenue, these features are game-changers. Consult the Shopify migration guide to understand the steps based on your original platform.

You can't recruit or retain qualified developers for your stack

The shortage of PrestaShop and Magento developers is real in France. Shopify, with its relatively accessible Liquid language and its global ecosystem of certified apps, simplifies recruitment and maintenance. This is an HR argument often underestimated in the decision.

Costs, timelines, and risks: an honest comparison

Here are the real ranges we observe at Stellar Projects for our projects, in 2025.

Redesign on existing CMS

• Graphic and UX redesign: €5,000 to €12,000 - timeline: 6 to 10 weeks
• Complete structural redesign: €10,000 to €20,000 - timeline: 8 to 16 weeks
• CRO audit + implementation: €2,000 to €8,000 - timeline: 4 to 8 weeks
• SEO risk: low to moderate (if URLs change)

Migration to Shopify

• Standard CMS migration (PrestaShop, WooCommerce) to Shopify: €5,000 to €15,000 - timeline: 6 to 14 weeks
• Migration to Shopify Plus (complex store): €15,000 to €50,000 - timeline: 3 to 6 months
• SEO risk: moderate, controllable with a rigorous 301 redirect plan
• Shopify recurring cost: €36 to €2,300/month depending on the plan

SEO risk needs to be taken seriously. A well-executed migration by a Shopify migration specialist agency preserves natural referencing thanks to a complete mapping of 301 redirects, the takeover of meta tags, structured data, and internal linking. At Stellar, we have never observed a lasting SEO decline on properly prepared migrations. A temporary decline (1 to 3 months) is inevitable; persistent regression is a sign of a botched migration.

"After migrating from Prestashop to Shopify, our company experienced 50% growth in 2023." - Noé F., Stellar Projects client

What Shopify concretely brings in 2025

Shopify is no longer just a platform for small stores. In 2024, Shopify processed over $235 billion in GMV (Gross Merchandise Volume) globally. Hermès, Kylie Cosmetics, Gymshark, Jacquemus: premium brands and significant volumes run on Shopify or Shopify Plus.

Here's what has truly changed in the last 24 months that strengthens the argument for Shopify in 2025.

Shopify Checkout: the best conversion rate on the market

Shopify claims a checkout conversion rate 15% higher on average than its competitors, according to their own data. Shop Pay, the accelerated payment option, shows even higher conversion rates. In France, the native integration of Klarna, Alma, and Paypal in one click measurably changes the mobile shopping experience.

Checkout Extensibility

Since 2023, Shopify Plus checkout is fully customizable via extensions (without modifying the source code). You can add upsells, custom fields, loyalty programs directly in the purchase funnel, without risky development or loss of PCI DSS certification.

Shopify Markets and native internationalization

Multi-currency management, multi-languages, local domains, automatic country-specific taxes: Shopify Markets radically simplifies international expansion. Features that used to require months of development and multiple modules on PrestaShop are available in a few clicks.

AI integrated into the core of the platform

Shopify Magic (integrated generative AI) offers automated product descriptions, suggested customer service responses, and performance insights. In 2025, AI is no longer an additional module: it is native to the platform. For brands that want to boost their conversion rate without multiplying developments, this is a concrete advantage.

Common mistakes in this arbitration

After having supported more than 100 stores at Stellar Projects, here are the errors we see regularly.

Confusing dissatisfaction with the provider and CMS limitations

Sometimes, the problem is not PrestaShop or WooCommerce: it's the agency that developed the site. A poor integration job on Shopify yields results as bad as a good job on a less powerful CMS. Before migrating, make sure your problem is truly structural and not related to mediocre execution.

Migrating without a redirect plan

Migration without a rigorous SEO mapping is the most costly mistake. Hundreds of product URLs change during a migration. Without properly configured 301 redirects, you lose all the SEO juice accumulated on your pages. This is non-negotiable. Learn how to approach it in detail with our 8-step guide.

Underestimating the migration budget

The cost of a migration is not limited to the development of the new site. It must include: data migration (products, customers, orders), configuration of third-party applications, team training, and any custom developments. Consult our detailed analysis on the budget to plan for a migration to Shopify.

Redesigning without data

Redesigning a site without analyzing heatmaps, session recordings, and conversion funnels is like repainting an apartment without having identified the source of the humidity. An audit of the existing is essential before any decision. Tools like Hotjar or Microsoft Clarity (free) provide insights in a few days.

Thinking that Shopify solves all problems

Shopify is an excellent platform. It's not a magic wand. If your product catalog is poorly structured, if your product pages are weak, if your value proposition is unclear, migrating to Shopify will not fundamentally change your conversion rates. The platform facilitates execution; it doesn't replace strategy.

Conclusion: how to decide

The choice between a redesign and a Shopify migration can be resolved with a simple framework. If your current CMS meets these three criteria simultaneously, stick with it and optimize: good technical performance, controlled maintenance costs, and the ability to implement the features you need. In this case, a well-executed CRO audit will give you a better short-term ROI.

However, if your platform is structurally limiting, if technical debt is accumulating, if your teams are wasting time on issues that should be natively resolved by your tool... then migrating to Shopify is not an expense; it's an investment in your growth capacity.

The right decision is not the one that costs the least today. It's the one that allows you to go faster, further, and more confidently towards your growth objectives. These are two different horizons, and neither is inherently better than the other.

If you are facing this decision and want an objective opinion based on your specific situation, our team at Stellar Projects offers no-obligation consultations to help you decide - and, sometimes, to tell you that you don't need us.