WEB AGENCY · DEVELOPMENT & CRO
Websites built to convert, not just to exist
Million Marketing, a web agency in Paris specialising in development and conversion, designs and rebuilds websites for mid-market companies, enterprise accounts and luxury brands. Scalable architecture, premium design, speed, native SEO and conversion rate optimisation (CRO): your website becomes a growth asset, not just a showcase.
Talk about your web project →See our case studies →
OUR WEB & CRO EXPERTISE
Six areas of expertise to build your digital asset
Web strategy & architecture
A modular architecture that absorbs growth (languages, markets, content) without a major rebuild, with technical SEO foundations from day one.
Discover our SEO →
Technical audit & consulting
Performance audit, UX friction points, specifications and technology choices (CMS, APIs), prioritised by measurable business impact.
Case study: management software publisher →
E-commerce & CRO
Frictionless sales and checkout funnels, optimised at every step: we fix the leaks in the journey before investing in acquisition.
Case study: luxury fashion brand →
Native SEO & Core Web Vitals
Semantic markup, speed and internal linking built in during development, and content that AI answer engines can read.
Discover AIO →
AI & automation
AI agents, smart forms and lead-capture automations, supervised and adjustable, with creative support from our AI Studio.
Discover the AI Studio →
Tracking & data
GTM, GA4 and server-side Conversion API to measure every interaction and feed your SEA campaigns with reliable signals.
Discover our SEA →
WHY US
Why entrust your website to Million Marketing?
- Senior technical leadershipYour project is led by an ex-Big Tech expert, to international quality standards.
- ROI-driven engineeringEvery technical choice aims at conversion and at lowering your future acquisition costs.
- AI-nativeBuilt-in agents and automations turn your website into an intelligent tool that serves your teams.
- Transparency & robustnessClean, documented and scalable code, with performance dashboards.
Ready to move forward?
Describe your project in two minutes: a senior expert will get back to you with a first analysis.
Request an audit →OUR WEB BUILDS
The site you are browsing is our first reference
We outsource neither design nor development. Every experience below was designed, coded and shipped by our own team, to the standards we apply to our clients’ websites: performance, bilingual delivery, measurement and security.

AI Observatory
An animated data visualisation, chapter by chapter, on desktop and mobile: every point of light is a brand cited by AI.
See the experience →Automated AIO diagnostic
A fully automated lead-generation tool: form, queries to several AI models, emailed report, bot protection and cost caps.
Try the diagnostic →3D map of our office
Google 3D maps integration with instant display, automatic fallback and an API key protected against abuse.
See the map →Remix diagnostic
Eight questions, two minutes: a score per channel and three priorities, computed live in the browser.
Take the diagnostic →Google Ads calculator
An interactive simulator estimating clicks, conversions, CPA and ROAS for a budget, with an animated profitability gauge.
Open the calculator →“Observatory” design system
One design system across more than 190 pages in French and English: typography, night-and-gold palette, consistent components and motion.
See the home page →OUR METHOD
The Remix: from strategy to performance
Our signature combines high-level strategic consulting with operational excellence, in four steps.
- 01
Diagnosis
Digital performance audit: data, tracking, customer journey and competition.
- 02
Strategy
Acquisition plan by channel, business objectives and steering KPIs.
- 03
Execution
SEA, SEO, AIO and Paid Social campaigns plus AI Studio creative, run by senior experts.
- 04
Value-based steering
Continuous ROI-driven optimisation and decision-grade reporting for your budget choices.
A web agency for mid-sized companies and enterprises, from redesign to conversion
For a mid-sized company or an enterprise, choosing a web agency is not just a question of visual style. Your website carries your investment in SEO, search advertising and paid social: if it is slow, poorly structured or poorly measured, every euro of acquisition returns less. We therefore approach website creation and redesign as a performance project, with business objectives defined from the scoping stage.
A B2B redesign project run by Million Marketing typically covers:
- Scoping: audit of the existing site (traffic, conversions, pages that generate revenue), objectives, personas and priority journeys.
- SEO migration: URL inventory, 301 redirect plan, retention of the content and links that perform, so you do not lose visibility at launch.
- Design and development: premium design consistent with your brand, fast pages (Core Web Vitals), semantic markup and structured data, language versions where needed.
- Measurement: GTM, GA4 and conversions sent back to your advertising platforms, so the site is managed on leads and revenue, not on traffic.
- Acceptance testing and post-launch: indexing checks, ranking monitoring and conversion rate optimisation (CRO) over the first weeks.
Based in Paris, we work with companies across France and internationally: see our digital agency in Paris page. The website then fits into an overall strategy, with our SEO agency and our search advertising campaigns.
Frequently asked questions about our web agency
Why choose a performance agency to design your website?
The website as the central pivot of your digital ROI. Unlike purely aesthetic approaches, we design your website as a conversion-oriented technology asset. Our methodology fuses high-end design with performance engineering: every architecture choice is validated by its potential impact on your ROI. For a cutting-edge agency, a website is not a mere showcase but the final destination of your SEA and SEO investments, optimized to turn every visitor into a real business opportunity.
How important are Core Web Vitals in your development process?
Technical infrastructure built to Big Tech operational standards. Loading speed and visual stability are not optional — they are pillars of Quality Score and user experience. We apply the rigor learned at Tech leaders to guarantee impeccable Core Web Vitals scores. An ultra-fast site radically reduces your bounce rate and improves your conversion rate, while sending a massive authority signal to search algorithms, securing your competitive advantage.
How do you integrate AI and automation into your websites?
AI innovation serving autonomy and onboarding. We go beyond conventional development by natively integrating our artificial intelligence solutions. By installing our Million IA® Agent, we automate complex onboarding and lead qualification directly on your site. In addition, our AI Studio lets us deploy interfaces rich in premium visual and video assets, creating an immersive, personalized experience that mechanically increases engagement among your mid-cap and enterprise audiences.
Are your websites natively optimized for SEO and AIO?
A semantic architecture designed for the future of search. We build “SEO-by-design” websites, including exhaustive Schema.org markup and a code structure perfectly readable by crawlers. Our expertise allows us to anticipate the shift toward AIO (Artificial Intelligence Optimization): we prepare your content so it can be directly assimilated by conversational AIs (ChatGPT, Gemini). This forward-looking vision ensures your site becomes a cited source of authority, not just another link in a list.
What scalability guarantees do you offer growing companies?
Modular design for total technological longevity. Coming from environments with complex life cycles, we build on scalable, secure foundations able to support your growth in load. Whether you use WordPress or headless technologies, we favor clean, documented, scalable code. This approach makes it possible to add business features, CRM gateways or AI modules without calling the entire system into question, protecting your technology investment over the long term.
What budget should you plan for a web development project with Million Marketing?
An investment calibrated to the project’s technical complexity, not a template price. The budget depends on the scope (showcase site, e-commerce platform, custom architecture), the desired level of AI integration and automation, and your Core Web Vitals and scalability requirements. We offer two entry formats: a Strategic Micro-Consulting session (1h) to frame your specifications, or a Campaign Management & Optimization retainer for continuous post-launch support. The precise quote is always confirmed after an initial audit of your technical needs and existing setup.
What is the delivery timeline for a high-performance website?
A site delivered quickly, without sacrificing performance or native SEO. Depending on complexity (number of pages, integrations, technical architecture), a web development project typically deploys in 6 to 10 weeks, from initial audit to production launch. We manage each stage with regular validation checkpoints rather than a single end-of-project delivery, to secure Core Web Vitals and SEO indexing from day one.
How do you redesign a website without losing its search rankings?
A migration prepared before go-live. We inventory existing URLs, identify the pages that generate traffic and conversions, then build a page-by-page 301 redirect plan. After launch, we check indexing, crawl errors and ranking trends in Search Console, and quickly correct any deviation.
Do you work with companies outside Paris?
Yes, across France and internationally. Our web projects are managed remotely, with regular validation meetings by video call and on-site meetings when the project warrants it.
LET’S TALK
Ready to build the infrastructure for your growth?
Choose the level of support that matches your urgency and your objectives.
01
Strategic Micro-Consulting (1h)
One hour with a senior expert to frame your specifications and prioritise your website workstreams.
Or call us on 01 89 86 41 09 (Mon–Fri).
02
Build, redesign & CRO
Tell us about your website, your goals and your timeline: a senior expert reviews every request and gets back to you.
