Every project has its own page. There you will find the background, the initial constraint, the design choices, the technical decisions, the SEO set-up and the measured scores — including the ones that still need work.
Rather than a recommendations deck, we build the site. These mock-ups are fully functional and have been presented to the businesses concerned.
They remain proposals: none has been approved or put online by its business, and we do not present them as client references.
Concept imagined for the Perrache landmark, a Lyon brasserie since 1836 and the largest brasserie in France. Showcasing the Art Deco frescoes, online booking, a detailed menu, private hire and a dedicated feature on its 190th anniversary. An unsolicited proposal by KAYZEN, presented to the house and not yet approved by it.
Demo mock-up created on KAYZEN's own initiative. The business has not approved it and is bound by no commitment.
Concept imagined for the bistronomic restaurant in Saint-Cyr-au-Mont-d'Or, five minutes from Lyon: a golden-stone building, a panoramic terrace and a village-square spirit. Bookings, seasonal menu and cookie-free audience measurement. An unsolicited proposal by KAYZEN, presented to the house and not yet approved by it.
Demo mock-up created on KAYZEN's own initiative. The business has not approved it and is bound by no commitment.
Every project has its own page: background, design decisions, technical choices, SEO set-up and measured scores. The reasoning, not just the result.
Sésame is the free password manager published by KAYZEN. The vault is encrypted on the device — Argon2id then AES-256-GCM — and the sync server, located in the European Union, only receives data it cannot read. Unlimited 2FA codes, passkeys, family sharing, import from 1Password, Bitwarden or KeePass: a single codebase for the web app, the Chrome, Edge and Firefox extension and the Android app.
Sésame Éclair is KAYZEN's free service for passing on a password, an API key or a .env file through a link that self-destructs after reading. The secret is encrypted in the browser, with AES-256-GCM, using a key that stays in the link, after the # sign: the server, hosted in the European Union, only receives a blob it cannot read. No account, 1 to 10 reads, 5 minutes to 30 days, optional PIN, read receipt and secret requests, in a web app available in seven languages.
Konsent is KAYZEN's GDPR audit platform. Where a consent management platform handles the banner, Konsent observes how the code actually behaves: what gets set before the visitor has had a chance to answer, who receives the data and under which jurisdiction. A three-phase protocol — before consent, after refusal, after acceptance — backed by a public framework of 139 rules, each citing its article, its regulatory decision and its known limitation.
Autonomous penetration-testing platform developed by KAYZEN. AI agents actually run the application, exploit the vulnerabilities and prove them with reproducible PoCs — zero false positives. A full audit in hours, fixes delivered as pull requests and compliance-ready reports. Built on the open-source Strix engine.
National weather service designed by KAYZEN: hour-by-hour forecasts, a 10-day outlook and agricultural weather for every French municipality. Interactive maps on a 247-point grid over 72 time steps, live rain radar, satellite and lightning. A complete agronomy section — soil temperature and moisture, FAO-56 ET0, water balance and growing degree days.
Conversion-focused showcase website for a Lyon finishing-trades contractor: painting, plastering, floor and wall coverings and bathrooms. Express quote form in the hero, job qualification in six fields, a call-back within 48 hours and local SEO across Lyon's 9 arrondissements and the wider metropolitan area.
Mouth-watering showcase website for Maison Victoire, a bakery and patisserie at Les Halles Paul Bocuse since 1990. Orders for in-store collection, a spotlight on the house praline brioche, a bilingual version and local SEO for Lyon.
Immersive website for Lyon's legendary covered market, voted the world's 3rd best market by Food & Wine. Directory of its 60 exceptional traders — butchers, cheesemongers, oyster merchants, MOF (Meilleurs Ouvriers de France) — opening hours, access and photo gallery.
Showcase website for Muller Toiture, roofers based in Mions. Roofing, zinc work, insulation and moss removal across east Lyon and northern Isère. Online roof estimator, emergency-leak banner and quotes within 48 hours.
Job portal for Hans Leutenegger SA, a Swiss industrial recruitment agency founded in 1965. Job search by region and trade, speculative applications, an employer area and a multilingual interface.
Showcase website for Atelier JUMP, a French textile design workshop in Vernaison since 1956. JUMFIL hunting clothing and workwear for hotels, restaurants and construction. 100% French manufacturing put front and centre.
Showcase website for AH Élec Rénov, a certified electrician offering turnkey interior renovation in Lyon and west of Lyon. NF C 15-100 compliance upgrades, bathrooms, kitchens, plumbing. Optimised quote-request funnel.
Showcase website for the artisan cutler Le Galant: folding and table knives made in Thiers, with a showroom on the banks of the Rhône in Serrières. Premium presentation of the pieces and craft storytelling by KAYZEN.
Showcase website created by KAYZEN for LM Espace Vert, a landscape gardener in Saint-Didier-au-Mont-d'Or. Garden design, maintenance, tree pruning and hard landscaping. Quotes within 24 hours and optimised local SEO in the Monts d'Or.
Showcase website for SER & BAT, interior renovation specialists in Lyon since 2008. Drylining, painting, bathrooms, kitchens. Highlighting its QUALIBAT certification and its partnerships with ICF Habitat and SACVL. Local SEO strengthened by KAYZEN.
Artist portfolio designed by KAYZEN for Philippe Reynaud, a fine art photographer. A gallery of black-and-white fine art prints, exhibitions and sales of original photographs. Pared-back design in the service of the image.
A French-language reference portal on naturopathy and nutritional therapy, developed by KAYZEN. In-depth guides on fasting, cleanses, medicinal plants, vitamins and health protocols. Editorial SEO architecture.
Showcase website for Chez Mounier, a family-run Lyon bouchon since 1985 on rue des Marronniers, Lyon 2. 100% home-made cooking — quenelles, tablier de sapeur — across 3 generations. Authentic atmosphere and bookings by phone.
Free web application developed by KAYZEN: numerology and birth chart in seconds, a professional ephemeris and 12 personalised divination arts. No sign-up, with a built-in personal journal.
Showcase website for Acte 2 Théâtre, a neighbourhood theatre in Lyon 9 (Vaise). Shows for young audiences, adult theatre, school performances, workshops and venue hire. Online ticketing for the current season.
Premium showcase website for Damien Mugnier, a high-end tiler and mason in Beauvallon, south-west of Lyon. Large-format tiles, marble, natural stone and terraces. Project gallery and free quote.
Showcase website for Restaurant Zigana, a Vaise institution since 2011 on place Valmy, Lyon 9. Home-made 100% veal kebab, traditional Turkish cuisine, grills and tacos. Online menu and optimised local SEO.
SaaS platform developed by KAYZEN that turns restaurant QR codes into a growth engine: AI menu, ordering at the table, integrated payments, automatic CRM and real-time analytics.
Professional photo-editing web application designed by KAYZEN. Non-destructive RAW pipeline, end-to-end ICC colour management and multi-format output: the modern alternative to Lightroom for photographers.
Elegant showcase website created by KAYZEN for L'Art-Scénic, a theatre company founded by Anne Kravz-Tarnavsky in Écully. Show programme, workshops for children and adults, photo gallery and booking for a free trial class.
Website built in Lyon for a coach hire company. Online booking platform, journey estimator, immersive design and local SEO optimised by KAYZEN.
Premium showcase website created by KAYZEN for an artisan butcher in Lyon 9. Bespoke visual identity, elegant typography, a showcase for Lyon's regional produce and strengthened local SEO.
Showcase website built in Lyon for a drylining contractor. Modern design, optimised quote-request funnel, mobile-first UX and Google local SEO strengthened by KAYZEN.
Event website for the JOD 2026 congress of the HCL (Hospices Civils de Lyon), the 5th Digestive Oncology Day: online registration, scientific programme, DPC accreditation (French continuing professional development). Premium design and UX optimised by KAYZEN.
Real PageSpeed scores measured on our flagship projects: performance, accessibility, best practices and SEO.
Immersive showcase website for Au P'tit Zinc, the iconic Lyon bistro open since 1992. Dark, warm design, full-screen photo carousel, online booking, interactive map and optimised local SEO. Quai Pierre-Scize, Lyon 5.
Elegant showcase website for the historic brasserie in Vaise, Lyon 9. Online booking, menu, and a showcase for its authentic atmosphere and Lyon heritage. Refined design with Google Analytics built in.
Premium showcase website designed by KAYZEN for La Raffinerie Lyon, a craft beer, tapas & cocktail bar with 2 venues in Lyon 3 (Saxe) and Lyon 9 (Vaise). Tasting guide, interactive menu, tapas pairings and immersive design.
Theatrical showcase website for Compagnie l'Entr'Axes, an amateur theatre company in Lyon directed by Agnès Faye since 2009. Show programme, workshops, repertoire, news and online booking. Dramatic design with elegant serif typography.
Premium showcase website of KAYZEN, the web design and SEO agency in Lyon. Modern design, optimised conversion funnel, services, transparent pricing and working method. 37 documented projects, each with its own case study.
AI-era SEO platform developed by KAYZEN. Free SEO audit, GEO/AEO/LLMO analysis and a 30-second diagnosis with actionable recommendations.
French document suite developed by KAYZEN. 31 free PDF tools that run 100% in the browser: merge, compress, sign, OCR, convert. No server, no sign-up, GDPR-compliant. Made in Lyon.
These sites are currently in development and will go live soon.
Property rental platform in Cape Verde, currently being designed. Online booking, filters by island (Sal, Boa Vista), concierge management and extras. High-end design by KAYZEN.
Chauffeured coach booking platform under development. Quote comparison, partner area and multi-step booking funnel.
The KAYZEN suite of applications
KAYZEN designs and publishes its own applications from Lyon. Run verified French legal research, follow AI news, protect your devices and access, share a secret, check your website's accessibility and compliance, or measure its visibility in search engines and AI. Each tool leads straight to a clear action; Sésame and Sésame Éclair are free.
French law at the source: case law, codes as they stood on the date of the facts, open-access legal scholarship and citations checked against Légifrance and Judilibre, with an MCP server for your AI agent.
Start a legal search(opens in a new tab)
KAYZEN's French-language AI news outlet: models, agents, MCP and open source, with official sources cited and written for SME leaders.
Read the latest articles(opens in a new tab)
DNS filtering, patches, antivirus and compliance reports combined in a single agent and a single console. Free for life for individuals.
Join the pilot programme(opens in a new tab)
Check which trackers are set before consent, who receives the data and which references apply.
Run a free audit(opens in a new tab)
Assess your website's accessibility with RGAA and WCAG checks, explanations and suggested fixes.
Discover Konforme(opens in a new tab)
Share a password or API key through a one-time link, encrypted in your browser. Completely free, no account needed.
Create a secret link(opens in a new tab)
An end-to-end encrypted password vault, open source and free, with syncing and family sharing.
Secure my passwords(opens in a new tab)
A VPN built in Lyon, with published trust criteria and a free tier planned at launch.
Follow the launch(opens in a new tab)
Security agents actually test your application and document exploitable vulnerabilities with replayable evidence.
Discover autonomous pentesting(opens in a new tab)
Get a free audit of your technical SEO, your content and your visibility in AI search engine answers.
Audit my website for free(opens in a new tab)New · Kayzen Security
One agent per device, one clear console, reports for your insurer. The pilot programme is open to businesses and MSPs; individuals will get free protection for life, with no ads. No app is available to download yet: sign up to be notified as soon as the one for your system is ready.
Join our satisfied clients. Free quote within 24 hours. Pay in three interest-free instalments.
Start my project
