SaaS & Tech Products

Turn your visitors into paying users .

Your Webflow site dates from V1. It looks good, but your trial conversion rate is plateauing, your feature pages don't exist, and your competitors rank on your keywords. I build custom SaaS marketing sites that feed your pipeline: optimised funnel, dedicated feature pages, native SEO/GEO, PageSpeed 95+.

5.0

par 22 clients

Your marketing site is costing you trials every day.

No funnel. The visitor reads and leaves.

No funnel. The visitor reads and leaves.

A prospect arrives, browses three pages, can't find a clear CTA and leaves. Without a structured conversion path — from landing to trial form — you lose your most qualified leads. The traffic is there, the sign-ups aren't.

Your competitors rank on your feature keywords.

Your competitors rank on your feature keywords.

When a prospect searches 'tool for [your feature]', it's your competitor that appears. Your feature pages don't exist, or they're poorly structured. Without built-in SEO, you miss the most valuable purchase intents — those where the prospect is actively comparing.

Your pricing page loses more visitors than it converts.

Your pricing page loses more visitors than it converts.

It's the most visited page on your site, and probably the least optimised. Confusing plans, no recommended plan, no annual/monthly toggle, zero social proof near the CTA. Every friction on this page is one less trial.

What your site does for you after launch.

It converts to trial or demo, not to the homepage.

It converts to trial or demo, not to the homepage.

Before coding, I analyse your funnel, your competitors and your ICP. Each page is built around a measurable objective: content structure, CTA positioning, visual hierarchy that guides to action. Design serves conversion, not the other way around.

Your feature pages rank and sell.

Your feature pages rank and sell.

Each key feature gets its own page, structured around the keywords your prospects use when comparing. Concrete benefit in the title, objections addressed, Google and AI positioning. Product SEO that feeds your pipeline.

Your pricing page guides to the right plan.

Your pricing page guides to the right plan.

Recommended plan highlighted, annual/monthly toggle, social proof in the right place, integrated FAQ. Pricing page UX is a direct lever on your MRR. Most SaaS under-optimise this page even though it's the most visited.

Your SaaS is found on Google and cited by AI.

Your SaaS is found on Google and cited by AI.

Silo architecture, structured markup, sub-1-second loading. Your SaaS cited in Google AI Overviews, ChatGPT and Perplexity when your prospects search for a solution like yours.

Three approaches for your marketing site. Only one feeds your pipeline.

Not recommended
Webflow or Framer: pretty, but plateauing.

Webflow or Framer: pretty, but plateauing.

Ideal for an MVP. But SEO is limited, performance plateaus, the CMS is basic. When you want a custom funnel, dedicated feature pages or advanced markup, you hit the limits. And you're locked into the platform.

Not recommended
Next.js template: fast to launch, generic.

Next.js template: fast to launch, generic.

The site is live in a week. But it's a template designed for everyone, optimised for no one. No structured funnel, no SEO feature pages. And maintenance falls back on your dev team — who should be working on the product.

Recommended
Custom marketing site: the standard for scaling.

Custom marketing site: the standard for scaling.

Funnel optimised for your ICP, feature pages that rank, native SEO/GEO, PageSpeed 95+. The code belongs to you. Your marketing team manages content, your dev team stays on the product.

Funnel de conversion SaaS Illustration animée montrant le parcours des visiteurs à travers un funnel de conversion SaaS optimisé : visiteurs, landing page, trial, utilisateurs payants. Visiteurs 10 000 / mois Landing page 4,2 % Avant: 0,8 % Après optimisation: 2,4 % Trial / Démo 32 % Clients payants 134 MRR ×3 trials

The mechanics behind your trials

A structured funnel multiplies your sign-ups by 2 to 3.

Most SaaS sites treat every page as an information page. The visitor reads, understands, and leaves. A well-architected marketing site turns each page into a step in a journey: the landing qualifies, the feature pages address objections, the pricing page guides to the right plan, the final CTA captures the sign-up.

When this funnel is properly structured, conversion rate typically goes from 0.8% to 2-3%. On the same traffic, that's 2 to 3 times more trials. Without spending a single extra euro on acquisition.

How it works in practice.

No 40-page specification document. We move fast, you validate at every step.
01

January 1, 2000

Scoping call

25 min to understand your product, your ICP and your conversion goals. I review your current site, your funnel, your analytics and your pricing page. You leave with a clear diagnosis, even if you don't sign.
02

Mockups and validation

Custom wireframes and mockups: homepage, feature pages, pricing page, conversion funnel. You see and approve before a single line of code is written. If the project requires it, I bring in a UI designer from my network.
03

Development and SEO

Ultra-fast site, built-in technical SEO, integrations (CRM, analytics, automations). You get a real-time preview. For content: I can write, optimise what you provide, or work with your marketing team.
04

Launch and follow-up

Go live, tracking configured, 3 months of support included. Then: content + evolution retainer (from €500/month), or ad hoc interventions. You choose.
Coddy: multi-country architecture, multi-currency payment, 90% automated.

Proof by example

Coddy: multi-country architecture, multi-currency payment, 90% automated.

Coddy is my startup. Urban escape games for individuals and companies across 9 European countries. I designed the entire platform: multi-country public site, management back-office, automated multi-currency booking and payment.

It's not a SaaS, but the technical complexity is comparable: multi-tenant architecture, multi-currency payment, per-country content management, API integrations, booking funnel optimised for conversion. That's the same rigour I apply to SaaS marketing sites.

See the Coddy case

No surprise invoices. Here's what it costs.

The price depends on the number of pages, the level of design customisation and technical integrations. A content management plan is available from €150/month: you send, I publish, your site stays alive without you touching it.

Landing Page
€2,400
1 page. Capture prospects for a specific offer, validate a positioning or support a campaign.
Request an audit
1 conversion-optimised page
Bespoke responsive design
PageSpeed score 95+
Technical SEO integrated
Contact form
Delivered in 2 weeks
Optional monthly content plan
Marketing Site
€5,200
5 to 10 pages. Your complete professional website with a blog to convert visitors and start ranking on Google.
Discuss your project
5 to 10 optimised pages
SEO blog included
Bespoke responsive design
PageSpeed score 95+
Technical SEO integrated
Delivered in 4 to 5 weeks
Optional monthly content plan
Most popular
Editorial Site
€7,900
10 to 25 pages. Become the reference in your sector. Advanced SEO/GEO strategy, multilingual support and business integrations.
Schedule a call
10 to 25 pages with topic cluster architecture
Advanced SEO/GEO strategy
Multilingual (EN/FR/NL)
CRM and analytics integration
PageSpeed score 95+
Delivered in 6 to 8 weeks
Optional monthly content plan

Prefer to manage your own content?

Frequently asked questions

How much does a SaaS marketing site cost at Numinam?

Three plans depending on your stage. Landing Page (1 page, conversion funnel, PageSpeed 95+): €2,400. Marketing Site (5 to 10 pages with SEO blog, product pages and pricing): €5,200. Editorial Site (10 to 25 pages, SEO/GEO silo architecture, multilingual, CRM integrations): €7,900. Beyond 25 pages: custom quote. The price covers custom design, technical SEO and delivery in 2 to 8 weeks depending on the plan. A monthly content management retainer is available as an option. A 30-minute call is enough to scope your needs and identify the right plan.

Why Numinam instead of Webflow or Framer for a SaaS?

Webflow and Framer are excellent for a first MVP site. But when you want a structured conversion funnel, dedicated feature pages that rank on Google, advanced structured markup or a truly optimised pricing page, you hit the limits of these platforms. Performance plateaus (poor Core Web Vitals), the CMS is basic, and you're locked into the ecosystem. A custom site gives you total control: PageSpeed 95+, native SEO/GEO, free architecture, code that belongs to you.

Can my dev team work on the Numinam site?

Yes. The site is built with Astro, a standard open-source framework. Your dev team can work on the code at any time — modify a page, add an integration, deploy a change. The code is hosted in your own Git repository, documented, and follows industry conventions. The goal is for your marketing team to manage content independently (via an admin interface or directly in the files) and for your dev team to step in when needed — without depending on Numinam.

How does Numinam optimise a SaaS pricing page?

The pricing page is often the most visited and least polished. I apply UX-validated conversion optimisation principles: recommended plan visually highlighted (price anchoring), annual/monthly toggle with savings displayed, social proof positioned near CTAs, integrated FAQ to address objections before they become drop-offs. Every element has a measurable objective. If you already have traffic, gains are visible within the first few weeks.

What concrete impact on conversion rate?

Every SaaS is different, but the orders of magnitude are consistent: a site with a structured conversion funnel — landing that qualifies, feature pages that address objections, pricing that guides to the right plan — typically converts 2 to 3 times more than a site without a clear path. If your current rate is 0.8%, a target of 2-3% is realistic on the same traffic. On 10,000 monthly visitors, that's the difference between 80 and 250 trials per month.

Does SEO on feature pages actually work for a SaaS?

Yes, and it's one of the most under-exploited acquisition levers. When a prospect searches 'collaborative project management tool' or 'automatic invoicing software', they're in an active comparison phase — purchase intent is strong. A dedicated feature page, structured around that keyword with the right markup and content, captures this intent traffic. The added advantage: these pages are also the ones AI tools (ChatGPT, Perplexity, Google AI Overviews) cite when a user asks for a recommendation.

Who writes the page content?

Three options depending on your situation. I can write the content from A to Z (included in the budget or as a supplement depending on volume). I can optimise the content you provide (restructuring, SEO, conversion copywriting). Or I can work directly with your marketing team or copywriter to produce together. We define the model during the scoping call based on your internal resources.

What happens if Numinam is no longer available?

The complete source code is hosted in your own Git repository from day one. The project uses standard open-source technologies (Astro, Node.js): your dev team or any experienced developer can take over. Technical documentation delivered at launch. Your site doesn't depend on a single person.

Can we migrate from Webflow to a Numinam site?

Yes. Existing content (text, images, structure) is carried over and integrated into the new architecture. If your Webflow site has SEO traffic, 301 redirects are set up on every URL to preserve your Google rankings. The Webflow site stays online throughout the development phase. The switch happens once everything is tested and validated.

Your SaaS deserves a site that converts as well as your product retains.

Your SaaS deserves a site that converts as well as your product retains.

25 minutes to analyse your current site, measure your actual conversion rate and identify immediate wins. You leave with a clear diagnosis, even if you don't sign.

Free. No commitment. With Sébastien, founder of Coddy (9 countries, automated multi-currency payment) and full-stack developer for over 10 years.

Book my free call — 25 min