High-performance websites

Your website is an employee like any other.

Your website exists. But is it working? Is it generating leads, converting visitors into customers, showing up on Google when your prospects search for what you sell? We build websites that convert, get found — on Google and by AI — and don't need constant babysitting.

Built to convert, get found, and stay out of your way.

Conversion & business

Conversion & business

Every page has a job.
Content architecture built around your funnel. CTAs positioned based on user behaviour. Not an online brochure — a salesperson that works 24/7.

SEO + GEO

SEO + GEO

Found on Google and cited by AI.
Silo architecture, structured markup, Core Web Vitals in the green. Plus GEO — optimisation for AI Overviews — built in from the start.

Custom design

Custom design

Your site reflects your product.
No templates. A design created from scratch for your brand. Wireframes and mockups approved before a single line of code is written.

Minimal maintenance

Minimal maintenance

Your site stops slowing you down.
Static Astro site — no exposed database, no plugins to update. For content, you send us what you want published, we handle it.

How we build your site

1 Understand

Audit of your current site

We analyse speed, SEO, mobile experience and the conversion journey. You walk away with a data-backed diagnosis and an action plan.
1 to 2 days
Audit of your current site
2 Design

Mockups and validation

Wireframes, mockups, iterations. You see and approve the design before we write a single line of code. No surprises at delivery.
1 to 2 weeks
Mockups and validation
3 Build

Development and integrations

We build the site in Astro with your integrations — CRM, analytics, forms. Native technical SEO from the first commit.
3 to 6 weeks
Development and integrations
4 Launch

Launch and optimisation

Go live, final tests, SEO redirects if migrating. Then ongoing performance monitoring and continuous adjustments.
Ongoing
Launch and optimisation

Numinam vs the alternatives

Conversion

Numinam (Astro)
Architected for lead generation
No-code (Wix, Webflow)
Limited to templates
WordPress agencies
Varies by agency

SEO & GEO

Numinam (Astro)
Native + AI-optimised
No-code (Wix, Webflow)
Basic SEO, no GEO
WordPress agencies
Plugin-dependent

Load time

Numinam (Astro)
< 1 second
No-code (Wix, Webflow)
2 to 4 seconds
WordPress agencies
3 to 6 seconds

Maintenance

Numinam (Astro)
Near-zero
No-code (Wix, Webflow)
Managed by the platform
WordPress agencies
Heavy (plugins, security)

Scalability

Numinam (Astro)
Blog, portals, API, AI
No-code (Wix, Webflow)
Limited
WordPress agencies
Possible but costly

Code ownership

Numinam (Astro)
100% yours
No-code (Wix, Webflow)
Locked in the platform
WordPress agencies
Yours, but ecosystem-dependent

No surprise quotes. Here's what it costs.

The price depends on the site's size, level of customisation and integrations. Not the number of meetings.

MVP Launch
€5,000 to €8,000
Validate your positioning and start converting.
Request an audit
4 to 8 conversion-optimised pages
Custom responsive design
PageSpeed score 95+
Technical SEO built in
Maintenance included for 3 months
Delivered in 4-6 weeks
Growth Ready
€8,000 to €18,000
Generate leads with an SEO blog and business integrations.
Discuss your project
10 to 25+ pages
SEO blog (silo architecture)
CRM and analytics integration
Multi-language (EN/FR/NL)
Maintenance + content included for 3 months
Delivered in 6-10 weeks
Most popular
Scale Mode
€18,000+
Complete digital infrastructure for your long-term growth.
Schedule a call
Complex custom architecture
Client portal / partner area
Deep API integrations (ERP, billing)
Automated post-conversion workflows
Native A/B testing
Delivered in 10-16 weeks

Frequently asked questions about high-performance websites at Numinam

How long does it take to get a website developed by Numinam?

Between 4 and 16 weeks depending on complexity. A high-performance brochure site: 4-6 weeks. A site with SEO blog, multi-language and integrations: 6-10 weeks. A full digital infrastructure: 10-16 weeks. We commit to a timeline from day one.

Does Numinam redesign existing websites or only build new ones?

Both. But only if the current site is a real barrier to conversion, credibility or speed. If the problem lies elsewhere, we'll tell you.

Is a website built by Numinam designed to sell, generate leads, or impress investors?

All of the above. A good website must convert prospects and inspire trust — whether for clients, partners or investors. We focus on structure, messaging and credibility before aesthetics.

Does Numinam collaborate with the client's marketing or product team?

Yes, and often with both. The website is a convergence point between acquisition, product and business messaging.

Is SEO included in a website developed by Numinam?

Technical SEO is built in from the start: speed, structured markup, content architecture, Core Web Vitals. For a full SEO strategy — content, positioning, GEO — we offer a dedicated service. See our SEO & GEO offering.

What is GEO (Generative Engine Optimization) and why does Numinam integrate it into its websites?

GEO stands for Generative Engine Optimization. It's about being cited in AI-generated answers (Google AI Overviews, ChatGPT, Perplexity). SEO makes you visible in traditional search results. GEO makes you visible in AI-generated responses. We structure your site for both from day one.

Why does Numinam build its websites with Astro instead of WordPress?

WordPress is powerful, but it carries heavy technical debt: plugins that need constant updates, a database to secure, and load times that increase with every addition. It's also the CMS most targeted by cyberattacks — unsurprisingly, it powers over 40% of the web. Astro produces ultra-fast static sites with virtually no attack surface and almost zero maintenance. For a marketing website focused on conversion and SEO, it's objectively better.

How does maintenance work for a Numinam website after launch?

Thanks to the static architecture, technical maintenance is close to zero — no plugins, no database to monitor. For content updates, we offer a plan where you send us what you want published and we handle it. You don't manage anything. You don't break anything.

Am I able to manage my website independently after Numinam delivers it?

By default, we handle the platform and content updates through a maintenance plan. You send us what you want published, we take care of it — zero hassle. If you'd rather manage things yourself, we can build a custom admin interface so your team is fully autonomous. Both models work — it depends on what suits you best.

Do I retain ownership of my website if I stop working with Numinam?

Yes. The code is 100% yours. No lock-in, no annual licence, no proprietary platform. If you ever want to switch providers, you leave with everything.

Can a website built by Numinam evolve if my business pivots?

That's built into the plan. The architecture is designed to evolve quickly without rebuilding from scratch. We know that version 1 is never the last.

A 4-second site instead of one = €144,000 lost per year.

A 4-second site instead of one = €144,000 lost per year.

30% of visitors leave before reading your offer. On 10,000 monthly visitors at 2% conversion, that's 60 leads lost per month. At €200 per lead: €12,000/month evaporating.

30 minutes to analyse your site and identify immediate wins. Free. No strings attached. With Sebastien, not a salesperson.

Book my free audit — 30 min