Migration & Replatforming

Migrate your e-commerce without losing a single euro in revenue

Your current platform is holding back your growth? High running costs, complex upgrades, accumulated technical debt. We manage your migration end-to-end — from diagnosis to go-live — securing every step.

Discuss your project See the methodology
They trust us
The challenge

Why companies migrate their e-commerce platform

After 3 to 5 years on the same solution, costs skyrocket and agility vanishes. The symptoms are clear:

Running and license costs constantly increasing (+20% per year on average)
Six-figure version upgrades that mobilize the entire team
Degraded time-to-market: 3 months to ship a simple feature
Declining performance, Core Web Vitals in the red
Dependency on increasingly scarce specialized developers
Monolithic architecture impossible to evolve without breaking everything
Fragile integrations that break with every deployment
Unoptimized cloud infrastructure costs
Architecture

Technical overview

Replatforming e-commerce progressif

Migration progressive avec coexistence ancien/nouveau socle et strangler-fig pattern

Point d'entrée
Front & Orchestration
Socles commerce
Services externes
Observabilité
Nouveau fluxLegacy (strangler)
Utilisateurs
CDN / WAFCloudFront, Fastly
FrontNext.js / Theme / SFRA
API Gateway / BFFRoutage & agrégation
Nouveau socle e-commerceHeadless / composable
PaiementStripe, Adyen
TaxeTaxJar, Avalara
FraudeSignifyd, Riskified
Ancien socleLegacy monolithe
OMSOrder Management
PIMAkeneo, Salsify
ERPSAP, NetSuite
CRMSalesforce, HubSpot
DAMCloudinary, Bynder
Logs
Metrics
Traces
Source
Traitement
Service
Stockage
Couche
Solution comparison

Which solution for your migration?

We don't have a favorite solution. We recommend the one that optimizes your TCO, fits your organization and supports your ambitions.

Shopify / Shopify Plus

Shopify / Shopify Plus

Strengths
  • Fast time-to-market, rich ecosystem
  • Hosting costs included, native scalability
  • Optimized checkout, high conversion
  • Headless possible via Hydrogen/Storefront API
Limitations
  • Limited customization vs open-source solutions
  • Platform dependency (vendor lock-in)
  • Transaction costs on sales
  • Multi-market complex in certain scopes
Ideal for: D2C brands, scale-ups, time-to-market priority
Salesforce Commerce Cloud (SFCC)

Salesforce Commerce Cloud (SFCC)

Strengths
  • Enterprise-grade, native multi-market
  • Salesforce ecosystem (CRM, Marketing Cloud)
  • Proven scalability on large volumes
  • Integrated OMS, multi-currency management
Limitations
  • High license costs (% of revenue + annual minimum)
  • Customization constrained by proprietary architecture
  • Upgrades imposed by Salesforce
  • Specialized developers rare and expensive
Ideal for: Large retail accounts, multi-market groups, existing Salesforce ecosystem
commercetools / MACH

commercetools / MACH

Strengths
  • Native headless architecture, API-first
  • Total freedom on the front-end
  • Composable commerce: assemble your building blocks
  • Cloud-native scalability, multi-tenant
Limitations
  • High initial integration complexity
  • Requires a strong technical team or dedicated partner
  • Significant front-end integration costs
  • Younger ecosystem vs monolithic solutions
Ideal for: Tech-driven companies, composable architectures, custom experiences
Sylius (Open-source PHP)

Sylius (Open-source PHP)

Strengths
  • Open-source, no platform license
  • Symfony architecture, maintainable and testable code
  • Native API Platform, headless-ready
  • Total flexibility, no vendor lock-in
Limitations
  • Smaller community than Magento/Shopify
  • Fewer out-of-the-box plugins
  • Requires qualified Symfony developers
  • Hosting and infrastructure to manage
Ideal for: Publishers, media, specific business models, TCO control
Adobe Commerce (Magento)

Adobe Commerce (Magento)

Strengths
  • Feature-rich (B2B + B2C)
  • Large ecosystem of modules and partners
  • Nearly unlimited customization
  • Native multi-store, advanced catalog management
Limitations
  • Very high running costs (infra + maintenance)
  • Heavy and expensive version upgrades
  • Average native performance, requires Varnish/Redis
  • Frequent technical debt on custom projects
Ideal for: Stay on Adobe if complex B2B+B2C catalog, large existing investment
Prestashop

Prestashop

Strengths
  • Free open-source, active French community
  • Simple to deploy for standard catalogs
  • Rich module marketplace
  • Low entry costs
Limitations
  • Aging architecture, difficult to scale
  • Modules often of uneven quality
  • Not suited for modern headless architectures
  • Limited multi-market without heavy extensions
Ideal for: SMBs with simple catalogs, constrained budgets, progressive scaling

No technology dogma. We recommend the solution best suited to your context, constraints and ambitions. Every choice is documented and justified.

Our methodology

End-to-end support, phase by phase

Each phase produces concrete deliverables. You maintain visibility and control at every step.

01 Diagnosis & Strategic Scoping
02 Architecture & Target Solution Design
03 Migration Plan & Transition
04 Build & Integrations
05 Acceptance, Performance & Security
06 Go-live, Ops & Continuous Optimization
01 2 to 4 weeks

Diagnosis & Strategic Scoping

Understand your business context, audit the existing platform, map the flows, and define the target. No pre-selected solution — we start from your challenges.
Deliverables
  • Existing platform audit (architecture, performance, costs, debt)
  • IS mapping: flows, integrations, dependencies
  • Business requirements gathering with your business teams
  • User pain point analysis (UX, funnel, conversion)
  • Solution benchmark and justified recommendation
  • Comparative TCO estimation over 3 years
  • Risk matrix and mitigation plan
  • Macro roadmap + transition planning
02 3 to 6 weeks

Architecture & Target Solution Design

Design the technical and functional architecture of the chosen solution. Anticipate the full ecosystem: front, back, integrations, infrastructure, monitoring.
Deliverables
  • Target application architecture (front, back, API, BFF)
  • Integration design (PIM, OMS, ERP, CRM, payment)
  • Cloud infrastructure architecture (AWS / GCP / Azure)
  • Data strategy: migration, transformation, mapping
  • Detailed functional and technical specifications
  • UX prototyping of critical journeys (checkout, search, PDP)
  • CI/CD plan and quality gates strategy
  • Security and compliance plan (PCI DSS, GDPR)
03 2 to 4 weeks

Migration Plan & Transition

Plan the transition without service interruption. Define cutover stages, go/no-go criteria, and fallbacks.
Deliverables
  • Data migration plan (products, customers, orders, SEO)
  • Cutover strategy (big-bang, progressive, strangler fig)
  • SEO redirect plan (URLs, 301, sitemap, canonicals)
  • Go/no-go criteria per phase
  • Rollback plan in case of incident
  • RACI matrix and multi-actor governance
  • Detailed timeline with milestones and dependencies
  • Internal communication and team training
04 3 to 9 months

Build & Integrations

Develop the target solution with iterative sprints, AI-assisted continuous quality control, and progressive integration of ecosystem components.

-40%coûts cloud
Deliverables
  • Iterative development (2-week sprints, regular demos)
  • Payment, logistics, PIM, ERP, CRM integrations
  • Automated unit tests (coverage > 80%)
  • Continuous integration and non-regression tests
  • Systematic code review + AI quality analysis
  • Incremental and validated data migration
  • Production-identical staging environments
  • Continuous technical and functional documentation
05 2 to 4 weeks

Acceptance, Performance & Security

Validate the solution before production deployment: load testing, security audit, exhaustive functional acceptance, and performance optimization.

S1S2S3S4S5
Deliverables
  • Complete functional acceptance (nominal + edge cases)
  • Performance tests and load testing (JMeter / k6)
  • Security audit and pentest (OWASP Top 10)
  • Core Web Vitals optimization (LCP, FID, CLS)
  • PCI DSS validation for direct payments
  • Accessibility testing (RGAA / WCAG 2.1)
  • Full migration dry-run
  • Compliance report and production go/no-go
06 Ongoing

Go-live, Ops & Continuous Optimization

Deploy to production, stabilize, monitor. Then optimize continuously: performance, conversion, infrastructure costs. Support on business roadmaps.
Deliverables
  • Supervised production deployment (war room)
  • Full monitoring and observability (logs, metrics, traces)
  • Alerting and on-call during initial days
  • Cloud cost and architecture optimization
  • Post-migration business roadmap support
  • Performance reporting (business + technical KPIs)
  • Continuous improvement plan and TCO reduction
  • Skills transfer and operational documentation
Business value

What you concretely gain

Expected results

TCO reduction of 30 to 50%

Releases 3x faster

Optimized performance and conversion

TCO reduction of 30 to 50%

Licenses, hosting, maintenance, releases — we optimize every cost item with an architecture designed for the long term.

Releases 3x faster

Industrialized CI/CD, automatic quality gates, AI testing — your teams ship faster and with more confidence.

Optimized performance and conversion

Shortened purchase funnels, page load < 2s, green Core Web Vitals — every millisecond counts for your revenue.

Guaranteed security and compliance

PCI DSS, GDPR, pentests, vulnerability scans — security is integrated from design, not added after the fact.

Scalability and longevity

Modular, standards-first, cloud-native architecture — your platform evolves with your ambitions without major overhaul.

Synergy with your teams

We work with your developers, not instead of them. Skills development, knowledge transfer, complete documentation.

Client references

They trusted us with this type of engagement

VEJA

Adobe Commerce to SFCC + OMS migration. Scoping, business workshops, data migration plan, integration architecture, team coaching.

Truffaut

E-commerce infra replatforming Magento + Mirakl. AWS migration, partner selection, multi-actor governance, industrialized CI/CD.

Groupe Bayard

Adult & Youth e-commerce redesign on Sylius + AWS. SSO integrations, payment, PIM. Security and accessibility audits.

Kering — Boucheron

Omnichannel multi-market e-commerce transformation (WW & APAC). IT/Ops management, hybrid cloud AWS/AliCloud, Kubernetes.

Christian Louboutin

E-commerce & Azure cloud lead since 2018. PCI DSS compliance, performance optimization, Adyen/Apple Pay payment, multi-zone operations.

Frequently asked questions

Your questions, our answers

01 How long does an e-commerce migration take?
From 6 to 18 months depending on complexity (number of markets, integrations, data volume). Our scoping phase provides a precise planning estimate. We favor a progressive approach to reduce risks.
02 How do you guarantee service continuity during the migration?
We use proven cutover strategies (strangler fig pattern, progressive migration, feature flags). Each stage includes go/no-go criteria and a rollback plan. The site remains operational throughout the transition.
03 What impact on SEO during a migration?
We map 100% of your existing URLs and implement a comprehensive 301 redirect plan. Canonical tags, sitemaps, and structured data are migrated and validated. The goal is zero organic traffic loss.
04 Do you work with our internal teams or as a replacement?
We systematically work in synergy with your teams. Our role is to bring architecture expertise, methodology, and acceleration — not to replace. Skills development and knowledge transfer are included.
05 How do you reduce running costs after the migration?
Optimized architecture (right-sizing, autoscaling, cache layers), process pooling, industrialized CI/CD that reduces cost per release, and proactive monitoring that prevents costly incidents. We target a 30-50% TCO reduction.
06 Which solution do you recommend for moving off Adobe Commerce?
It depends on your context. Shopify Plus for time-to-market, SFCC for enterprise multi-market, commercetools for composable commerce, Sylius for total control. Our initial diagnosis compares options against your specific criteria.

Ready to regain control of your platform?

Free 30-minute initial assessment. We analyze your context and give you initial guidance — no commitment.

Schedule a call See all our solutions