Showcase websites & e-commerce
Fast, search-optimised websites that are easy to evolve, for tradespeople, shops and SMEs.
Far more than a web agency
Websites, apps, software: what KAYZEN builds
KAYZEN does not just deliver websites. We also build mobile apps, Windows and macOS software, browser extensions and SaaS platforms — and we publish our own products, used every day.
Our expertise, with proof
Websites with advanced features
Interactive maps, calculations, real-time data, 3D: when the website becomes a tool.
SaaS platforms
Subscription-based online software, with accounts, dashboards and APIs.
Mobile apps
Android and iOS apps that share the same code as your web version.
Examples:
Windows & macOS software
Installable, secure desktop applications, ready for the Microsoft Store.
Examples:
Browser extensions
Chrome, Edge and Firefox extensions that bring your service to where your customers work.
Examples:
AI & automation
AI agents, visibility analysis in answer engines and automated business tools.
Security & compliance
GDPR audits, RGAA accessibility, penetration testing: tools that measure rather than claim.
Our products
Tools that we publish, maintain and use ourselves. Each one demonstrates expertise that we put to work for our clients.
Nexus SEO
The SEO platform for the AI era: SEO, GEO and AEO audits in seconds.
- SaaS
CITEIA
Measure whether AI tools (ChatGPT, Perplexity…) cite your business, and why.
- SaaS
Konsent
GDPR audit: what your website actually stores before consent.
- SaaS
Konforme
RGAA and WCAG web accessibility, measured automatically.
- SaaS
Sentinel
Penetration tests run by AI agents, with vulnerabilities proven by example.
- SaaS
Sésame
Free password manager, end-to-end encrypted.
- Web
- Extension
- Android
- Windows
Sésame Éclair
LaunchingShare a secret through an encrypted link that self-destructs once read.
- Web
DocuSûr
31 free PDF tools, processed entirely in your browser.
- Web
Météo Climat France
Hour-by-hour and agricultural weather forecasts for every municipality in France.
- Web
A project that fits no box?
Website, app, software or internal tool: describe your needs and we will reply within 24 hours.