Stop Losing Visitors to Slow Load Times. Build Faster with Astro.

We’re an Astro agency and create ultra fast websites.
100% performance , 0% unnecessary ballast , 90+ Core Web Vitals.
Get the website that Google loves and your competition fears.

Schedule your free Astro consultation Send us an email

A large group of people posing together indoors, smiling and waving at the camera. The setting appears to be a modern office or event space with lighting and a disco ball overhead.

Meet Seibert Products GmbH. As part of the Seibert Group, a globally operating software company from Germany, we bring 30 years of experience in creating state-of-the-art software solutions and customer satisfaction.

We’re an official Astro partner agency, recognized by the Astro team for our expertise and contributions to the ecosystem.

Customers who trust Seibert Group

How website performance impacts your business

High performance is not just a technical concern—it is a business requirement, especially for content-focused websites. Poor performance degrades user experience and consistently translates into lower engagement, reduced conversions, and revenue loss.

Every 100 ms faster → 1% more conversions (Mobify)
50% faster → 12% more revenue (AutoAnything)
20% faster → 10% more conversions (Furniture Village)
40% faster → 15% more registrations (Pinterest)
850 ms faster → 7% more conversions (COOK)
Every 1 second slower → 10% fewer users (BBC)

The democratization of publishing

Astro breaks the silos between code and content. We believe publishing should be inclusive, not restrictive. Whether your team lives in Markdown and MDX, manages global scale via a Headless CMS, or fetches data directly through APIs, Astro provides a unified stage for everyone.

It is the ultimate equalizer: Developers get the architectural freedom of their favorite frameworks, while editors enjoy the intuitive workflows they require. By decoupling the source from the output, Astro ensures that everyone—from engineers to marketers—can publish on their own terms.

Your workflow, your tools, one lightning-fast result.

Astro - The Usain Bolt of web frameworks

Astro leads the performance race by delivering 0% JavaScript by default. Combined with powerful static generation and lazy loading, it ensures your content reaches users instantly, maximizing engagement and perfecting your Core Web Vitals.

In an era where every millisecond translates into revenue, this ‘static-first’ approach eliminates the heavy ‘JavaScript tax’ that slows down traditional sites. The result? Higher search engine rankings, lower bounce rates, and a frictionless path to conversion. We don’t just build websites; we build high-speed sales engines that outperform the competition on any device.

Astro

63%

Wordpress

44%

Gatsby

42%

Next.js

27%

Nuxt

24%

% of real-world sites with good Core Web Vitals. Based on real-world-performance data from HTTP-Archive and the Chrome UX Report.

Astro Islands - A simple solution for maximum speed

By decoupling static content from dynamic components, we ensure instant “First Contentful Paint”. We utilize Astro Islands—independent, interactive modules that hydrate only when they enter the viewport or are required for interactivity or personalization.

This allows for rich, dynamic features within a lightweight, server-rendered shell, providing the perfect balance between a traditional static site and a modern web application.

Did you now: Astro lets you integrate your preferred framework (React, Vue, Svelte, and more) with zero friction. Build your ‘Islands’ using the tools you already love—no complex workarounds, just pure, flexible development.”

Header (Interactive Astro Island)

Sidebar (Static HTML)

Content (Static HTML)

Image Slider (Interactive Astro Island)

Footer (Static HTML)

Want to see real Astro performance in action?

Speed is the invisible driver of conversion. A one-second delay can cost you 7% of your sales. Are your Core Web Vitals standing in the way of your success?

Use the google page speed analyzer to visualize the performance gap and see how an ultra-lightweight Astro architecture can accelerate your business with 90+ Core Web Vitals.

Check Astro Website Check your own Website

Astro services seibert can offer you

Custom Astro Website & Application Development

We design and build bespoke, high-performance websites and web applications using Astro. From marketing pages, portfolios, and blogs to scalable digital platforms, every project is developed with speed, SEO, and user experience as core priorities. Our focus on optimized rendering and performance-driven architecture helps turn visitors into customers.

As an official Astro Agency Partner, we leverage deep framework expertise to deliver solutions tailored to your business goals, content strategy, and long-term growth.

Migration to Astro

Ready to leave slow load times behind? We migrate your existing website from legacy systems, popular frameworks, or CMS platforms to a modern, high-performance Astro architecture. Our proven migration process preserves your content, functionality, and SEO value while delivering measurable performance improvements. We manage the technical complexity end to end, minimizing risk and disruption.

Escape framework fatigue and move to Astro with a trusted partner who ensures a smooth, efficient, and stress-free transition—so you can focus on scaling your business, not your technology.

Astro Performance Optimization

Already using Astro but not seeing the performance benefits you expected? Our optimization service audits and enhances your existing Astro site’s speed, core web vitals, and overall performance for better user engagement and SEO rankings.

We identify bottlenecks, implement best practices, and fine-tune your Astro implementation to deliver the lightning-fast experiences your users deserve. From image optimization to JavaScript reduction, we’ll help your Astro site reach its full potential.

Let us help you squeeze every millisecond of performance from your Astro deployment.

Astro Integrations

We expertly connect Astro with your existing tools and services, creating a cohesive ecosystem that powers your digital presence. Our integration expertise includes:

Headless CMS platforms (Storyblok, Contentful, Sanity)
E-commerce backends like Shopify
Authentication systems
Analytics platforms
Third-party APIs and services Whether you need simple API connections or complex multi-system integrations, we ensure your Astro site works seamlessly with your entire technology stack.

Astro Consulting & Architecture

Get expert guidance across every phase of your Astro project, from initial planning and architectural design to selecting the right integrations and structuring clean, maintainable components. We help define a scalable, performance-focused foundation that supports long-term growth and flexibility.

Our consultants work closely with your team to translate business goals into sound technical decisions, ensuring your Astro implementation meets performance, SEO, and maintainability requirements while avoiding unnecessary complexity and future rework.

Ongoing Astro Support & Maintenance

We provide ongoing support, maintenance, and feature enhancements to keep your Astro project secure, stable, and high-performing. Our services include regular updates, bug fixes, and continuous improvements, ensuring your site stays aligned with the latest Astro releases and security best practices.

With our maintenance packages, you reduce technical risk and ensure your Astro platform remains reliable and ready to scale.

Frequently asked Questions

This FAQ answers the most common questions about Astro.js, from performance and architecture to integrations and use cases. Whether you’re new to Astro or considering it for your next project, you’ll find clear, practical insights to help you understand how Astro works and when it’s the right choice.

What makes Astro different from other frameworks like React or Next.js?

Astro is built for speed. While other frameworks send large amounts of JavaScript to the browser by default, Astro delivers Zero-JS by default. It only loads interactivity where absolutely necessary using a unique “Islands Architecture.” This results in websites that load significantly faster, especially on mobile devices.

How does an Astro website improve my SEO rankings?

Search engines like Google prioritize page speed and structural clarity. Because Astro pre-renders your content into lightweight, static HTML, search engine crawlers can index your site instantly. Higher Core Web Vitals scores directly correlate with better search rankings and lower bounce rates.

Can I still use my favorite tools like React, Vue, or Tailwind?

Absolutely. One of Astro’s greatest strengths is being framework-agnostic. We can build your site using React, Svelte, or Vue components—or even mix them together—without the typical performance penalties. You get the developer tools you love with the speed your users demand.

Why should I hire an Official Astro Agency?

As an official Astro partner agency, we have a direct line to the Astro core team and early access to new features. We don’t just “use” Astro; we follow the framework’s best practices to ensure your site is scalable, secure, and optimized. You’re hiring experts who are vetted by the creators of the framework.

Seibert is also ISO 27001 certified to provide you the highest safety of your data.

Is Astro only for simple blogs and landing pages?

Not anymore. With the latest updates in Astro 5.0, the framework is a powerhouse for content-rich sites, e-commerce stores, and complex web portals. Its “Server Islands” and “Hybrid Rendering” allow us to build highly dynamic features (like user dashboards or shopping carts) on top of lightning-fast static pages.

Can you migrate my existing WordPress or Next.js site to Astro?

Yes. Migration is one of our core services. We specialize in “decoupling” your content from slow, legacy systems and moving it to a modern Astro frontend. This often results in a 40-60% improvement in load times and significantly lower hosting costs.

How does Astro handle content management (CMS)?

Astro is built to play nice with almost any data source. Whether you want to use a Headless CMS (like Sanity, Contentful, or Strapi) or keep things simple with Markdown, we can set up a workflow that makes it easy for your marketing team to update content without touching a line of code.

Will a faster website actually increase my revenue?

Data shows that every 100ms of latency can cost up to 1% in conversions. By reducing your load time from 3 seconds to under 1 second, we help you capture users who would otherwise abandon a slow-loading page. Speed isn’t just a technical metric; it’s a business growth lever.

Is Astro secure?

Because Astro generates static HTML for the majority of your site, it removes the common attack vectors found in database-driven platforms like WordPress. There is no “live” database for hackers to exploit on the frontend, making your site inherently more secure and much easier to maintain.

What does the maintenance and hosting look like?

Astro sites are incredibly cost-effective to host. Because they are lightweight, they can be deployed on modern edge networks like Vercel, Netlify, or Cloudflare for a fraction of the cost of traditional servers. Maintenance is also simplified because you no longer have to deal with “plugin hell” or frequent security patches.

Seibert Group in Numbers

More than

450

Employees in 4 companies

Offices in

locations worldwide

Revenues exceeding

175

million USD in 2024

Group of colleagues having a discussion around a table with a laptop and water bottles, surrounded by hanging plants.

Ready to partner with the astro experts?

We’re more than just another agency — we’re an official astro partner with deep expertise and a strong commitment to the framework. From launching new projects and handling complex migrations to providing long-term support, we work as a true partner in your growth.

Schedule your free Astro consultation Send us an Email

Send us a message!

Seibert Group GmbH

Luisenstraße 37-39, 65185 Wiesbaden

+49 611 20570 0 astro-help@seibert.group