This is the question most clients ask too late, often after they’ve already outgrown their first architecture. The honest answer is: it depends on your team’s maturity and your growth velocity. For early-stage products or MVPs, a well-structured monolith with clean module boundaries is faster to build and cheaper to operate. You can always extract services later. But if you’re already at scale, processing high transaction volumes, or have multiple independent teams working on the product simultaneously, a microservices approach delivers the deployment independence and fault isolation that makes growth manageable.
What I’ve consistently seen in our web application development projects is that the mistake isn’t choosing the wrong architecture upfront, it’s choosing an architecture and then treating it as permanent. The right web app development partner helps you build for where you’re going, not just where you are today.