About Us

Conlumina is a sustainable web agency dedicated to creating high-performance, user-centric, and environmentally conscious web solutions. We shoot for the very best in WordPress and web standards.

Mission and Values
Planet

We help businesses reduce their online carbon footprint by up to 75%, promoting a sustainable digital future.

People

We champion a user-centric web, ensuring accessibility, privacy, and ethical digital marketing practices.

Performance

We engineer websites to exacting standards for speed, accessibility and SEO, backed by a top performance guarantee.

Sustainable WordPress Agency

Fabian Kastner, founder & CEO

Conlumina is a boutique WordPress agency based in Stockholm and Berlin, working with organisations across Europe and beyond. We design, build and optimise high-performance websites that are faster, more accessible and easier to maintain.

We specialise exclusively in WordPress, creating custom websites that combine technical excellence with thoughtful design and measurable business results.

Whether launching a new website or improving an existing one, we focus on creating digital experiences that help organisations grow while reducing unnecessary complexity and environmental impact.

As a boutique agency, we work closely with every client, providing direct access to experienced specialists throughout the project. No outsourcing, no unnecessary layers of management – just thoughtful strategy, precise execution and long-term partnership.

Our Promise
100% Quality

Our websites are handcoded from scratch, and come with a top performance guarantee.

PageSpeed Guarantee
100% Flexibility

Clients can confidently edit and expand their websites without worrying about issues.

Easy Management
100% Accessibility

Our websites are WCAG and WAI-ARIA compliant, with full keyboard control.

Equal Access
What Clients Say
The collaboration with Conlumina was professional and seamless throughout. The result is a website we are genuinely proud of and that reflects our new brand identity exactly as we envisioned.
Cecila Ramström, Marketing Manager at Big Image
Not only did we get a great user experience for our customers. Thanks to the methodical approach of research, validation, planning, and design, we also reached our business goals.
Guy Saban, Online Marketing Manager at Tuttnauer
Smooth cooperation on design and development of our new website. Nice to work with a developer that easily understood our needs and requests, and efficiently turned them into solutions. A small agency that you can rely on.
Anne Lubbe, Head of Communications at KHR Architecture
I highly recommend Conlumina for their WooCommerce expertise to anyone facing the common challenges of establishing an e-commerce business.
Lior Ashkenazi, Chief of Staff at ehouse
Fabian is a pleasure to work with, filled with good will and a positive vibe, always giving us a safe feeling that he knows what he's doing. We are thankful from the bottom of our hearts to have met him and for having him with us on board.
Adi Levy, Product Manager at Artist-Run Alliance
We had a very specific vision of what our website should look and feel like. Conlumina really went out of their way to realise it in every little detail, and then some. The design is simply perfect. We couldn’t be happier with the result!
Sandra Praun, Co-Founder of Praun & Guermouche
Fast, flexible and highly knowledgeable, everything that our previous agency was not.
Susanne Wibert, Head of Communications at House of Dance
If you're looking for a boutique agency that delivers quality work with personalised service, Conlumina is a great choice. We highly recommend them for any digital needs. You won't be disappointed!
Abdullah Atmacasoy, Managing Director at AJustPeer
Absolutely perfect care and great work. The websites run perfectly and the performance on Google is sensational.
Dr. Markus Handl, Business Owner