App islands: an edge you can rent is not an edge

When we landed in San Francisco, the obvious move was to rent a CRM. Everyone managing a founder and investor network buys the same tools and pours their relationships into someone else’s funnel. We built our own instead: a small app that matches how we actually meet people, our data format, our pace. It took days, not quarters, because an agent wrote most of it.

Renting the floor

There is a common belief that buying software makes companies faster. The playbook for years: rent the best SaaS on the market, hire people who use it well, call the combination an edge.

But a tool everyone can rent at the same price is, by definition, not an advantage. It is table stakes. Worse, it quietly forces your company to work the way the vendor imagined. Your own processes get squeezed into someone else’s funnel.

Big tech understood this early. Google builds its own everything: developer tools, infrastructure, internal apps. A tech island that runs on its own DNA. Building an island used to cost billions of dollars and thousands of engineers, so only giants had one.

AI broke that equation. The cost of an island is collapsing toward a weekend and an agent.

The edge stays in-house

So the real strength of a company is no longer which popular stack it rents. It is how precisely its internal tools fit its own unwritten rules. You stop being a consumer of software and become the producer of exactly what you need.

The deepest break is ownership. Every process improvement you build inside rented software stays inside the vendor’s walls. The micro-tools you design yourself become IP that compounds inside your company. You are not sharing a platform, and its rules, with your competitors. The edge literally stays in-house.

We used to say the hardest thing to copy was company culture. For the next generation of winners it will be the internal codebase: the processes a company has made autonomous, in tools it owns.

The companies building their own app islands will not just run faster than the competition. They will write their own rules for the race.