Shopify Agency — Stellar Projects
Are you looking for a Shopify agency that can transform 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 ongoing management.
- Our vision as a Shopify agency
- What a Shopify agency truly is today
- When to call on us and what to 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 addressing questions our clients ask before committing.
In summary - what you can expect from a Shopify agency:
- A readable, fast, and reliable e-commerce system that converts more
- An SEO architecture designed for longevity and content that answers user 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 quickly explain, quickly reassure, and quickly convert. Stellar Projects is a growth-oriented Shopify agency: our value doesn't lie 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 incoherent proposition, gadget integrations that slow down the store, and project rituals that consume energy without creating value.
Concretely, we prioritize reusable components, understandable journeys, clean data, visible reassurance messages, and respect for your customers' time. We adopt a partner posture: you ask us for tangible results, we owe you readable deliverables and well-reasoned choices.
Our approach is formalized in the STELLAR™ Method, based on 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 theme that loads quickly on mobile, SEO based on a clear architecture, an email cycle that earns more than it costs, and light but effective operational 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 to carry out a customized audit.
What we consider non-negotiable
- Mobile readability and real performance (Core Web Vitals)
- Clear architecture and thoughtful internal linking
- Reliable tracking and GDPR compliant consent
- Minimal but up-to-date documentation
What we avoid
- Overloaded themes that are impossible to maintain
- Technical debt hidden behind effects
- Analyses without action plans or ownership
- Operations without metrics or decisions
3. When to call on us and what to 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 start:
Rapid clarity
We synthesize your challenges into three concrete objectives. This clarity allows for quick decisions and focuses 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 posture
We challenge your ideas, not for the sake of it, but to save your time and budget. Useful controversy is part of the service.
To learn more, see the dedicated pages: 5 reasons to use an agency for your e-commerce redesign and 5 reasons to use a Shopify agency.
4. How to choose a Shopify agency
Choosing a Shopify agency isn't just about feeling or price. It's about identifying the partner who can transform your vision into measurable results. Here are our recommendations:
- Clarify your objectives: increased revenue, improved customer experience, migration, internationalization... The more precise your expectations, the easier it is to find the agency that meets them.
- Verify Shopify expertise: prioritize 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, 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 collaborated with the agency. Their feedback on quality, responsiveness, and adherence to deadlines is invaluable.
To go further: How to find a Shopify agency to double your sales and How to choose a Shopify agency.
5. Comparison of Shopify agencies in France
We encourage you to compare. There is no universally better agency, only the best one for your objectives. Use the table below to create a shortlist, then supplement it with directories like HelloDarwin and Sortlist.
| Agency | Positioning | Recommended projects | Key services |
|---|---|---|---|
| Stellar Projects Our selection | Growth, SEO and automation-focused Shopify agency | Ambitious redesigns, migrations, CRO, SEO, lifecycle | UX UI, build, Shopify SEO, Klaviyo, integrations |
| Axome | E-commerce agency with strong execution capabilities | Structural redesigns and multi-team projects | Shopify build, integrations, support |
| W3Lead | Shopify and e-mailing, luxury and fashion oriented | Migrations with conversion and identity challenges | UX, headless, POS, marketing automation |
| Unique Paris | Shopify Plus and international | Complex flows, multi-market, refined artistic direction | UX, integrations, operations |
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 consists of clarifying the scope, prioritizing what creates immediate value, and organizing subsequent stages 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 cleaning
- SEO and content: architecture, internal 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, JSON-LD FAQ, minimal email setup
- €25,000 – €60,000 ("Scale" Offer): custom UX/UI, complete migration + redirects, advanced SEO and semantic cocoons, 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. Ongoing operations (maintenance, evolutions, A/B tests) are then quoted as a monthly fee based on the desired velocity.
Items often overlooked in a quote
- Content preparation (text, visuals, video) and associated rights
- Cleaning and normalization of product data
- Copywriting for micro-content (promises, proofs, FAQ) oriented towards conversion
- 301 redirect plan and switchover tests to preserve SEO
- Documentation, training, handover, and post-launch support
- Ongoing operations budget (testing, 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 is in vs. out
- Team & governance: who does what, rhythm of rituals, 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, and we'll 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 right agency for your context?". Geographical 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/emailing), and sectoral references.
When to prefer an agency close to you
- Regular physical workshops and co-design sessions
- 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 an issue
- 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 outweighs proximity
Cities with high Shopify density
We have dedicated pages for major cities with local ecosystems, regional agencies, and sector-specific characteristics: Paris, Lyon, Marseille, Bordeaux, Toulouse, Lille, Montpellier, Nantes, Brussels. Rennes, Strasbourg, and other cities are covered via our national panorama.
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 comparable case study with a client contact
- Organize a 20-min call to validate method, team, rituals
- Send an identical mini test brief to 3 agencies (same assumptions, same figures)
- Decide on execution speed + clarity of plan, not just 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 monitoring through online rituals. Few meetings, lots of execution, clear reporting (conversion, SEO, email, performance).
8. How we frame an engagement
A good project starts with good framing. Our method reduces uncertainty, chooses an ambitious but deliverable MVP, and organizes the rest into short cycles. We avoid six-month tunnels that exhaust teams and budgets.
- Useful Diagnosis: inventory of existing assets, risks, assumptions, dependencies. Qualification of scope and putting sensitive topics on the table.
- Realistic MVP: selection of pages, sections, and integrations that create maximum impact. Everything else goes into a prioritized backlog.
- Clear Rituals: a short review each week, 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 ordering your priorities, delivering a high-performing theme, structuring your SEO, automating customer relationships, and implementing simple management.
Strategic consulting and framing
- KPI-oriented quarterly roadmap
- Clear scorecard for friction-free decision-making
- Clear trade-offs between useful effects and "wow" effects
- Tracked objectives: conversion rate, net revenue, margin, LTV
User Experience (UX) and Conversion User Interface (UI) Design
- Library of modular sections ready for editing
- Micro-content that resolves doubts at the right place
- Consistent empty states, errors, 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
Klaviyo CRM and Marketing Automation
- Essential operational flows (welcome, abandoned cart, 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 (solid cosmetic DTC), Bienaimé 1935 (niche perfumery from Le Marais), Maroquinerie Renouard (high-end leather goods), PERS Skincare (premium skincare), Le Minor (iconic Breton fashion), and our in-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 agency specializing in migration 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 | Launch quickly and well, or revive a struggling store | Express audit, modular theme, on-page SEO, JSON-LD FAQ, 3 Klaviyo flows | €10k – €25k |
| Scale | Redesign with ambition and integrate your key tools | Custom UX UI, migration + redirects, advanced SEO and semantic hub, 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 store operation | 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, tree structure simplification, useful FAQs. Typical result: maintained 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 rate.
- Pragmatic Lifecycle: welcome, abandoned cart, post-purchase, re-purchase. Typical result: email revenue share increases 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 indicator of platform knowledge, but it doesn't replace concrete case studies or a proven methodology. Ask for references comparable to your project and speak directly with the clients concerned to validate real-world 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 standard 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 quickly deliverable MVP — generally 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, etc.) 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) responds to specific contexts: ultra-personalized experiences, highly 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 over time.
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 challenge lies in search and filter ergonomics. 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. Shopify technical SEO (architecture, speed, Core Web Vitals, structured data, internal linking, semantic hub) is inseparable from the build. An agency that completely separates the two often creates SEO debts that are difficult to correct later. At Stellar Projects, SEO is integrated from the framing phase.
What's the difference between a Shopify agency and a general e-commerce agency?
A Shopify agency specializes in the Shopify ecosystem (themes, API, apps, Shopify Payments, Markets, Checkout extensibility, etc.). 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 services for us. We build and operate complete Klaviyo systems: setup, essential flows (welcome, abandoned cart, post-purchase, re-purchase, winback), RFM segmentation, campaigns, and A/B tests. Goal: for email to account for 20% to 30% of your store's revenue. See our Klaviyo × Shopify page.
How does a migration to Shopify happen without losing SEO?
Securing SEO during a migration relies on four pillars: (1) comprehensive mapping of existing URLs and their organic traffic, (2) an exhaustive and tested 301 redirect plan before the switch, (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 subjects requiring intensive co-construction.
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 operate in Paris and Île-de-France.
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 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 hub.
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 (site, SEO, email). At Stellar Projects, we focus on the site, SEO, and CRM — sustainable levers that improve the ROI of your paid acquisition without depending on it. We can work in coordination with your media agency.
What is a Shopify retainer or AMS?
A retainer (or AMS — Application Maintenance Service) 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 big project every time a need arises.
What's the difference between a fixed price and time and materials for a Shopify agency?
A fixed price sets a scope, deliverables, and price defined in advance — ideal for a structured redesign with clear specs. Time and materials (or régie) 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, percentage 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 really an official Shopify partner?
Yes. Stellar Projects is an official Shopify Partner, which gives us access to Shopify's resources, training, and support teams. It also means we adhere to the platform's guidelines and that our developments are maintainable over time during Shopify updates.
11. To go further — 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 practical support.
📚 Stellar Projects Guides & Resources
If this guide has helped you clarify your expectations, the easiest way is to contact us with three pieces of information: your 90-day business objective, your main constraint, and a link to your store or mock-up. We will get back to you with a one-page scoping proposal.