Shopify Agency — Stellar Projects
Are you looking for a Shopify agency capable of transforming your store into a revenue driver? Stellar Projects has been supporting e-commerce brands on Shopify and Shopify Plus since 2018: strategy, build, SEO, Klaviyo CRM, and run.
- Our vision as a Shopify agency
- What a Shopify agency truly is today
- When to call on us and what you can expect
- How to choose a Shopify agency
- Comparison of Shopify agencies in France
- How much does a Shopify agency cost?
- Where to find a Shopify agency?
- How we frame an engagement
- What we do for you
- Shopify agency FAQ
- To go further — resource hub
This guide provides our vision of the business, the criteria for choosing the right Shopify partner, a comparison of agencies in France, realistic price ranges, and a comprehensive FAQ on questions our clients ask before committing.
In summary - what you can expect from a Shopify agency:
- A clear, fast, and reliable e-commerce system that converts more
- An SEO architecture designed for longevity and content that answers users' questions
- An email cycle that respects your customers and generates recurring revenue
- Clear support, readable indicators, and real execution speed
1. Our vision as a Shopify agency
We believe in a simple idea: a Shopify site is not a design object; it's a system that must explain quickly, reassure quickly, and convert quickly. Stellar Projects is a growth-oriented Shopify agency: our value lies not in the length of a specification document, but in the clarity of your choices, the speed of execution, and the quality of what remains once the superfluous is removed.
We reject visual effects that mask an inconsistent proposition, gadget integrations that slow down the store, and project rituals that consume energy without creating value.
Specifically, we prioritize reusable components, understandable journeys, clean data, visible reassurance messages, and respect for your customers' time. We adopt a partner stance: you ask us for tangible results; we owe you clear deliverables and reasoned choices.
Our approach is formalized in the STELLAR™ Method across seven pillars: System, Traction, Execution, Leverage, Learning, Adaptation, Resilience. These seven dimensions structure every project framing and every brand diagnosis we conduct. Details can be found in our book Creating your brand in the AI era (Amazon).
Our promise as an official Shopify partner agency is verifiable: a fast-loading mobile theme, SEO based on clear architecture, an email cycle that brings in more than it costs, and light but effective run rituals.
2. What a Shopify agency truly is today
The term "Shopify agency" covers very different realities. Some teams sell an aesthetic but poorly structured theme, others multiply applications, and still others deliver perfect redesigns in presentation but slow to materialize.
Our definition is operational: a Shopify agency is a multidisciplinary group capable of transforming a business intention into a manageable Shopify commerce system, adapted to the specific needs of each brand. If you want to understand what this concretely entails, consult our Shopify agency for a custom audit.
What we consider non-negotiable
- Mobile readability and real performance (Core Web Vitals)
- Clear architecture and well-thought-out internal linking
- Reliable tracking and respected GDPR consent
- Minimal but up-to-date documentation
What we avoid
- Overloaded themes impossible to maintain
- Technical debt hidden behind effects
- Analyses without action plans or ownership
- Run without metrics or decisions
3. When to call on us and what you can expect
Call on our Shopify agency when you need clarity and execution. You entrust us with a measurable objective, and we build the trajectory that leads to it. We don't promise the moon, but a visible pace of progress and a store that exudes simplicity.
Here's what you can expect from the outset:
Rapid clarity
We synthesize your challenges into three concrete objectives. This clarity allows for quick decision-making and focusing effort where it matters.
Useful deliverables
You receive editable components, action checklists, and an iteration plan. No dormant deliverables.
Simple interpretation of results
We track indicators that you understand at first glance: conversion, speed, email revenue, useful SEO.
Partner stance
We challenge your ideas, not for the sake of it, but to save you time and budget. Useful controversy is part of the service.
To learn more, consult the dedicated pages: 5 reasons to use an agency for your e-shop redesign and 5 reasons to use a Shopify agency.
4. How to choose a Shopify agency
Choosing a Shopify agency is not just a matter of feeling or price. It's about identifying the partner who can transform your vision into measurable results. Here are our recommendations:
- Clarify your objectives: increasing turnover, improving customer experience, migration, internationalization... The more precise your expectations, the easier it is to find the agency that meets them.
- Verify Shopify expertise: prefer an official Shopify partner agency that masters the platform. Review their project portfolio, the diversity of their clients, and the results achieved. Our client cases illustrate successful redesigns and migrations without SEO loss.
- Evaluate communication and transparency: a reliable partner listens, asks the right questions, and explains their methodology. Ask to meet the team that will work on your project.
- Compare scopes: some agencies focus on design, while others offer comprehensive support (SEO, CRM, ERP integrations). Ensure the agency covers your strategic challenges.
- Anticipate budget and ROI: demand a detailed proposal with clear milestones, identified deliverables, and measurable KPIs.
- Consult references: talk to clients who have already worked with the agency. Their feedback on quality, responsiveness, and respect for deadlines is invaluable.
To go further: How to find a Shopify agency to double my sales
5. Comparison of Shopify agencies in France
We encourage you to compare. There is no universally best agency, only the best one for your goals. Use the table below to create a shortlist, then supplement with directories like HelloDarwin and Sortlist.
| Agency | Positioning | Recommended projects | Key services |
|---|---|---|---|
| Stellar Projects Our selection | Growth-oriented Shopify agency, SEO and automation | Ambitious redesigns, migrations, CRO, SEO, lifecycle | UX UI, build, Shopify SEO, Klaviyo, integrations |
| Axome | E-commerce agency with strong execution capacity | Structural redesigns and multi-team projects | Shopify build, integrations, support |
| W3Lead | Shopify and e-mailing, luxury and fashion oriented | Migrations with conversion and identity stakes | UX, headless, POS, marketing automation |
| Unique Paris | Shopify Plus and international | Complex flows, multi-markets, refined artistic direction | UX, integrations, run |
For a complete comparison of the 10 best Shopify agencies in France 2026 with ratings, sectoral references, and detailed profiles, consult our comparative article on the best Shopify agencies in France.
6. How much does a Shopify agency cost?
A good budget doesn't buy hours; it buys results. Our approach is to clarify the scope, prioritize what creates immediate value, and organize the rest in short cycles.
Factors that influence the price
- Functional scope: pages, sections, templates, product variants, facets, search
- Design level: adjusted premium theme vs. custom design (UX/UI and component systems)
- Integrations: ERP, PIM, CRM, OMS, POS, carriers, payment
- Data migration: products, customers, orders, 301 redirects, attribute cleanup
- SEO and content: architecture, linking, FAQ, structured data, copywriting
- International: Shopify Markets, i18n, hreflang, taxes, country-specific catalogs
- Custom apps: specific development and associated maintenance
- Quality & compliance: mobile performance, accessibility, GDPR, QA
Indicative ranges (initial build)
- €10,000 – €25,000 ("Boost" Offer): modular premium theme, 6-8 key sections, essential on-page SEO, FAQ JSON-LD, minimal email setup
- €25,000 – €60,000 ("Scale" Offer): custom UX/UI, complete migration + redirects, advanced SEO and semantic cocoon, major email flows
- €60,000 – €150,000+ ("Premier" Offer): international, Shopify Plus, critical integrations, custom apps, enhanced QA, extended security and governance
These ranges cover the initial build. The run (maintenance, evolution, A/B tests) is then quoted as a monthly fee based on the desired velocity.
Items often overlooked in a quote
- Content preparation (texts, visuals, video) and associated rights
- Cleaning and standardization of product data
- Writing micro-content (promises, proofs, FAQ) focused on conversion
- 301 redirect plan and switchover tests to preserve SEO
- Documentation, training, handover, and post-launch support
- Run envelope (tests, optimizations, regulatory changes)
How to read (and compare) an agency quote
- Concrete deliverables: named pages, sections, components, integrations
- KPIs & milestones: objectives per phase, acceptance criteria
- Assumptions & exclusions: what's in vs. out
- Team & governance: who does what, ritual frequency, SLA
- Switchover plan & hypercare: who monitors what, for how long
We detail these elements in our dedicated guide: How much does a Shopify agency cost?
Need a precise quote? Talk to a Shopify expert: share your 90-day objective, your main constraint, and the status of your store, we will get back to you with a one-page framework.
7. Where to find a Shopify agency?
The right question isn't just "where are they?", but "where to find the relevant agency for your context?". Geographic proximity, time zone, language, knowledge of your markets... all these elements matter as much as the portfolio.
Our directory (recommended starting point)
We maintain an up-to-date list of Shopify agencies by city and specialty: see the list of Shopify agencies. Filter by region, project type (migration, redesign, Shopify Plus, CRM/e-mailing) and sectoral references.
When to prioritize an agency close to you
- Regular physical workshops and co-design
- Logistics and retail: POS deployments, in-store training, media shoots
- Non-technical teams: in-person presence helps overcome friction during change management
When distance is not a problem
- Performance-oriented projects: conversion-first redesign, SEO, integrations and analytics
- Digital organization: teams accustomed to online rituals
- Rare specialty: Shopify Plus, headless, or sector-specific expertise that takes precedence over proximity
Cities with high Shopify density
We have dedicated pages by metropolis with local ecosystem, regional agencies, and sectoral specificities: Paris, Lyon, Marseille, Bordeaux, Toulouse, Lille, Montpellier, Nantes, Brussels. Rennes, Strasbourg, and other cities are covered via our national overview.
How to quickly source (5-step method)
- Start with our list of agencies to generate 6-8 candidates (filter by city/specialty)
- Ask for 1 case comparable to yours with client contact
- Schedule a 20-min call to validate methodology, team, and rituals
- Send an identical mini test brief to 3 agencies (same assumptions, same figures)
- Decide based on execution speed + clarity of the plan, not solely on price
Where we operate
Our Shopify agency operates in France and Europe with a hybrid model: in-person framing and design at the start, execution and follow-up through online rituals. Few meetings, lots of execution, readable reporting (conversion, SEO, email, performance).
8. How we frame an engagement
A good project starts with good framing. Our method reduces uncertainty, selects an ambitious but deliverable MVP, and organizes subsequent work in short cycles. We avoid six-month tunnels that exhaust teams and budgets.
- Useful Diagnostic: inventory of existing assets, risks, assumptions, dependencies. Qualification of scope and laying out sensitive topics.
- Realistic MVP: selection of pages, sections, and integrations that create maximum impact. Everything else goes into a prioritized backlog.
- Clear Rituals: a short weekly review, a decision point every two weeks, a monthly impact report.
- Attention Contract: we protect your time and ours. Fewer meetings, more tested iterations.
9. What we do for you
We don't sell a website; we build a lever. Our Shopify team focuses on prioritizing your needs, delivering a high-performing theme, structuring your SEO, automating customer relationships, and implementing simple management.
Strategic consulting and framing
- KPI-oriented quarterly roadmap
- Readable scorecard for frictionless decision-making
- Clear trade-offs between useful effects and "wow" effects
- Tracked objectives: conversion rate, net revenue, margin, LTV
User Experience (UX) and Conversion Interface Design (UI)
- Library of modular sections ready for editing
- Micro-content that resolves doubts in the right place
- Consistent empty states, error messages, and reassurance messages
Design serves your revenue, not the other way around.
Shopify Build and Mastered Integrations
- High-performing and accessible theme
- ERP, PIM, CRM, OMS, POS integrations when useful
- Clear and reliable marketing data layer
- Deliverables: versioned repo, editing guide, mobile performance check
Managed Shopify SEO
- Content hub plan and editorial briefs
- Internal linking and JSON-LD FAQ
- Monthly optimization calendar
Details: our Shopify SEO service
CRM and Klaviyo Marketing Automation
- Operational essential flows (welcome, abandon, post-purchase, re-purchase, winback)
- RFM segments and useful campaigns
- Continuous A/B testing on subject, offer, and creative
See: Klaviyo × Shopify
International and Markets
- Market-by-market roadmap
- International SEO localization (i18n) and hreflang tags
- Country-specific operational rituals
Custom apps when necessary
- KPI-oriented specifications
- Monitoring and maintenance
- Impact measurement and return on effort
Performance, accessibility, compliance
- Performance and image budgets
- GDPR consent and security
- Targeted accessibility checks
Some brands we support
Our portfolio includes Le Petit Olivier (DTC solid cosmetics), Bienaimé 1935 (Marais niche perfumery), Maroquinerie Renouard (high-end leather goods), PERS Skincare (premium skincare), Le Minor (iconic Breton fashion), and our house brand Cabania (cabin beds, +€100,000 monthly revenue since 2025). This sectoral diversity gives us perspective on each new project.
To go further: What services are offered by an e-commerce agency
Migration and redesign: our end-to-end service
Changing platforms or redesigning a Shopify site is not just about pages and modules. It's a shift in focus: what needs to become simple, fast, understandable. Our Shopify migration-specialized agency secures the transition and uses it as an opportunity to clarify the offer, reduce noise, improve conversion, and preserve SEO value.
- Due diligence: technical and SEO audit, URL and dependency mapping, realistic planning
- Architecture and useful content: simple and extensible tree structure, internal linking designed for SEO, editorial briefs
- Data and continuity: product/customer/order migration, tested 301 redirects, attribute cleanup
- Build and hypercare: documented high-performing theme, necessary integrations, 30-day hypercare
Learn more about e-commerce migration to Shopify.
Our offers and engagement models
| Offer | For whom | What's included | Indicative budget |
|---|---|---|---|
| Boost | To launch quickly and well, or to relaunch a store lacking momentum | Express audit, modular theme, on-page SEO, JSON-LD FAQ, 3 Klaviyo flows | €10k – €25k |
| Scale | To redesign ambitiously and integrate your key tools | Custom UX UI, migration + redirects, advanced SEO and semantic cluster, 6 Klaviyo flows | €25k – €60k |
| Premier | High-growth brands or Shopify Plus | International, custom apps, data-driven run, enhanced governance and SLA | €60k – €150k+ |
| Retainer / AMS | Long-term operated store | Monthly velocity, rituals, SLA, shared impact dashboard | Upon quote |
Brief Use Cases
Some typical scenarios we regularly handle:
- Migration with SEO constraint: URL mapping, 301s, simplification of tree structure, useful FAQs. Typical result: maintenance of organic traffic and +15% conversions.
- Conversion-first redesign: noise reduction, benefit clarification, structured product sections, proofs and micro-content. Typical result: +25% add to cart.
- Pragmatic Lifecycle: welcome, abandon, post-purchase, repurchase. Typical result: email revenue share goes from 10% to 25% in three months.
- Continuous improvement run: one test, one learning, one improvement each month. Typical result: +10% cumulative revenue in six months.
10. Shopify agency FAQ (18 questions)
Do you need a certified Shopify agency?
Shopify Partner certification is a good sign of platform knowledge, but it doesn't replace concrete case studies or a proven method. Ask for references comparable to your project and speak directly with the clients involved to validate the real experience.
What's the difference between a Shopify agency and a Shopify Plus agency?
Shopify Plus is Shopify's enterprise tier, designed for high-volume brands (>€1M online revenue) or those with advanced needs (multi-market, B2B, critical integrations). A Shopify Plus agency masters additional features: Scripts, Launchpad, Wholesale channel, Audiences, and extended APIs. If you're not yet on Shopify Plus, a classic Shopify agency is sufficient in most cases.
How long does a Shopify redesign take?
From a few weeks (adapted existing theme, simple scope) to several months (custom design, complex migration, multiple integrations). We encourage a rapidly deliverable MVP — typically 6 to 10 weeks for a Boost redesign — followed by iterations that continuously add value.
Premium Shopify theme or custom theme, which to choose?
A premium theme (Dawn, Impulse, Prestige...) allows for a quick start if the brand identity is simple and the catalog homogeneous. A custom theme is justified if the brand experience is a strong competitive lever, if the catalog is complex, or if you have specific functional needs. Hybrid approaches — premium theme + custom sections for key screens — are frequent and often the best compromise.
Is headless Shopify essential?
No. Headless (Shopify + decoupled front-end in Next.js for example) addresses specific contexts: ultra-personalized experiences, very demanding content SEO, sub-second performance on massive catalogs. A well-built, optimized, and documented Shopify theme is sufficient in 90% of cases and costs much less to maintain long-term.
Is Shopify suitable for large catalogs (10,000+ products)?
Yes, provided that the architecture, navigation facets, PIM, and data flows are intelligently designed. The real difficulty lies in search and filter usability. Solutions like Searchie, Boost Commerce, or a well-configured Shopify Search & Discovery solve most use cases.
Can a Shopify agency also manage SEO?
Yes — it's even a differentiating factor. Technical Shopify SEO (architecture, speed, Core Web Vitals, structured data, internal linking, semantic clustering) is inseparable from the build. An agency that completely separates the two often creates SEO debt that is difficult to correct afterwards. At Stellar Projects, SEO is integrated from the framing phase.
What is the difference between a Shopify agency and a general e-commerce agency?
A Shopify agency specializes in the Shopify ecosystem (themes, APIs, apps, Shopify Payments, Markets, Checkout extensibility...). It knows the specific constraints and opportunities of the platform, the patterns that work and those that create technical debt. A general e-commerce agency can work on several platforms (Prestashop, Magento, WooCommerce, Shopify), but this versatility sometimes comes at the expense of depth on each.
Do you offer Klaviyo / email services?
Yes. Email and CRM are core to our services. We build and operate complete Klaviyo systems: setup, essential flows (welcome, abandon, post-purchase, repurchase, winback), RFM segmentation, campaigns, and A/B tests. Objective: for email to represent 20% to 30% of your store's revenue. See our page Klaviyo × Shopify.
How does a migration to Shopify happen without losing SEO?
Securing SEO during a migration relies on four pillars: (1) complete mapping of existing URLs and their organic traffic, (2) exhaustive 301 redirection plan tested before switchover, (3) preservation or improvement of architecture and internal linking, (4) post-launch verification (Search Console, logs, positions) during the hypercare period (minimum 30 days). We document our method in our guide on e-commerce migration to Shopify.
Can you work with a Shopify agency remotely?
Yes, and that's our primary mode of operation. We work with brands in France and Europe from our offices, with online rituals (sprint reviews, asynchronous decisions, Slack, Loom). In-person workshops are possible at the start or for topics requiring intensive co-creation.
Which Shopify agency for a brand in Paris?
The Île-de-France region has the largest number of Shopify agencies in France. The geographical criterion is relevant if you have frequent in-person workshop needs. Otherwise, the choice of agency should prioritize specialization (SEO, CRM, Shopify Plus, sector) rather than location. We regularly work in Paris and the Île-de-France region.
How to budget a Shopify redesign with €20,000 to €30,000?
With this budget, the winning strategy is: well-chosen premium theme + customization of the 3-4 high-stakes screens (homepage, product page, collection page, checkout) + on-page SEO + minimal email setup. Avoid spending on animations or gadget apps. Prioritize mobile performance, conversion micro-content, and JSON-LD FAQ. Phase 2: in-depth SEO and semantic clustering.
Can a Shopify agency also handle advertising (Meta, Google Ads)?
Some Shopify agencies integrate paid media into their offering, while others focus on owned & earned (website, SEO, email). At Stellar Projects, we focus on the website, SEO, and CRM — sustainable levers that improve the ROI of your paid acquisition without depending on it. We can coordinate with your media agency.
What is a retainer or AMS Shopify?
A retainer (or AMS — Application Maintenance Services) is a monthly operational contract: you purchase intervention velocity (in days or sprint points) to continuously evolve, correct, and improve your store. It's the best way to maintain performance over time without starting a major project every time a need arises.
What's the difference between a fixed price and time-based billing for a Shopify agency?
Fixed price sets a scope, deliverables, and price defined in advance — ideal for a well-framed redesign with clear specs. Time-based billing (or dedicated resources) is suitable for uncertain or evolving needs (R&D, exploration, rapid iterations). In both cases, demand clear milestones and explicit acceptance criteria to protect your budget.
How to evaluate the results of a Shopify agency?
Indicators to track: conversion rate (visitors/buyers ratio), average order value, revenue per session, Core Web Vitals (LCP, CLS, INP), SEO positions for strategic keywords, proportion of revenue generated by email, customer recurrence rate. A good Shopify agency should offer you a dashboard of these indicators from the start — not overwhelm you with unreadable reports.
Is Stellar Projects truly an official Shopify partner?
Yes. Stellar Projects is an official Shopify Plus partner, which gives us access to Shopify's resources, training, and support teams. This also means that we adhere to the platform's guidelines and that our developments are maintainable over time during Shopify updates.
11. To go further — content hub resources
This guide is part of a set of resources we maintain on the Shopify ecosystem. These pages delve deeper into the topics discussed here and refer to our Shopify agency for concrete support.
📚 Stellar Projects Guides & Resources
If this guide has helped clarify your expectations, the easiest way is to write to us with three pieces of information: your 90-day business objective, your main constraint, and a link to your store or mockup. We will get back to you with a one-page framework proposal.