What is Astro?

Astro is a web framework — the toolkit a developer uses to build your website. It's open-source, it was first released in 2021, and it has quietly become one of the most popular ways to build content-focused sites: company websites, service businesses, landing pages.

You never see the framework itself, the same way you never see the construction method behind your house. You see the finished rooms. But the method decides a lot about how the finished thing performs, and Astro's method is distinctive.

Most traditional platforms assemble each page on demand. Someone visits, the server queries a database, runs a stack of code, and sends back the result — every single visit. Astro does that work once, ahead of time. Every page is built into plain HTML before anyone ever visits, and when they do, the finished page simply gets handed over.

Plain HTML is the simplest, fastest thing a browser can receive. Everything else about Astro follows from that one decision.

Because pages are pre-built, an Astro site loads with almost nothing standing between your visitor and the content. There's no heavy runtime working behind the scenes, no plugin stack loading its own scripts and styles, and no code shipped to the browser that the page doesn't genuinely need. Astro even has a name for that last idea — "islands" — where JavaScript loads only for the specific parts of a page that are interactive.

This isn't abstract. The website you're reading right now is built on Astro. In Google Lighthouse it scores 99 for performance on desktop and high 80s on mobile, with 100 for accessibility, best practices, and SEO. Those numbers matter beyond bragging rights: page speed feeds Google's Core Web Vitals, which influence where you rank, and slow pages measurably lose visitors before they ever read a word.

A traditional content site carries a database, an admin login, and usually a collection of plugins — each one a piece of software that needs updating, and each update a small chance of something breaking. Keeping all of that healthy is genuine ongoing work. It's a big part of why WordPress management exists as a service.

A content site built with Astro carries almost none of that. There's no database to compromise and no plugin stack to patch, so most of the common attack surface simply isn't there. Upkeep shrinks to occasional dependency updates handled by your developer, and hosting becomes simple and cheap — pre-built pages can be served from a global network with nothing to run on a server.

For a business, that translates to fewer maintenance invoices and far fewer 2am surprises.

Here's the honest part. Astro doesn't come with an admin login where you type into a box and hit publish. Your content lives in the site's code, or in a separate content system connected to it. Day-to-day changes go through your developer — or, increasingly, through AI-assisted workflows where you describe the change in plain English and it's made, reviewed, and published for you. That second option is changing the economics of running a site this way, and it deserves its own article, which is coming.

Whether the trade-off matters depends entirely on how you publish. If your site changes a few times a month, routing updates through the team that built it is painless, and you bank the speed, security, and upkeep wins. If your marketing team publishes daily and wants full self-service control, that's a real requirement, and it points to a different platform.

Northbase builds on the platform that suits the job. We reach for Astro when a site's priorities are performance, security, and low ongoing cost — marketing sites, service businesses, landing pages, and anywhere Google rankings carry commercial weight. We build on WordPress when a client's team needs to own day-to-day publishing, when an editorial workflow spans multiple people, or when the site leans on an ecosystem WordPress does well. Roughly 40% of the web runs on WordPress, and it earns that position.

We'll put the two head-to-head properly in an upcoming piece on our insights page. In the meantime, if you're weighing up a build, our website development page covers how we approach the platform decision for each project.