6 min read
A website is primarily informational. It presents content to a visitor (who you are, what you offer, how to contact you) and the same content is shown to everyone. A marketing site, a portfolio, and most brochure sites fall into this category.
A web application is interactive and stateful. It responds to what a specific logged-in user does, like a dashboard, a booking system, an admin panel, or a SaaS product. It usually needs authentication, a database per user, and more engineering investment than a website.
The two aren't mutually exclusive. Many products are a marketing website built for SEO and lead generation, sitting in front of a web application that's the actual product. Knowing which one you're building, or whether you need both, changes the technology choice, the timeline, and the budget significantly.
If you're not sure which you need, the simplest test is this: does the page look the same for every visitor, or does it need to remember who's logged in and show them their own data? The answer usually settles it.