From 0 to 1: cloning a SaaS in a week

Two years ago, cloning Bitly was a six-month project: a team of three or four, a roadmap, sprints, QA, and a six-figure budget. Today, one engineer with an LLM does it in a week. That is not a prediction. It is exactly how we built Link.

What "a week" actually covers

When we say Link was built in days, we mean all of this:

• A redirect engine that resolves a custom alias and returns the destination in milliseconds.
• A dashboard with analytics by day, referrer, country, device, browser and OS — no cookies.
• QR codes in SVG and PNG, password-protected links, expiration, max clicks, tags and a UTM builder.
• A public v1 API with Bearer API keys.
• Google-only login. No signup forms, no passwords to store.

Each of those pieces was a two-week ticket in 2019. Today it is an afternoon.

What actually changed

It is not that AI "codes by itself". It is that 80% of the work in a standard SaaS is code that has been written a thousand times before: CRUD endpoints, migrations, validation, tests, an API key scheme, a rate limiter. That code does not need genius; it needs time. LLMs cut that time from weeks to minutes.

The senior engineer did not disappear — the role changed. Nobody types boilerplate anymore. The job is what it always should have been: deciding the architecture, reviewing, cutting features, keeping the system coherent. AI writes fast; someone still has to know what to ask for and what to reject.

The result is a brutal asymmetry: the cost of building a typical SaaS dropped by one or two orders of magnitude. And the cost of running it was already public knowledge — a VPS, a database, bandwidth measured in cents.

The consequence nobody says out loud

If building a link shortener costs one person one week, charging $12 a month to use one is not a business. It is rent collected out of habit.

SaaS prices rested on a reasonable argument: software was expensive to build, and someone had to pay those salaries. That argument is dead. When production costs collapse, prices follow — it happened to music, to storage, to international phone calls. Software is not special.

We simply make it explicit:

1. Self-host, $0. Link's code is open source. Download it, audit it, run it. It is yours.
2. Cloud at cost. If you don't want to operate anything, we run it for you and you pay exactly what the cloud costs. No margin, not a cent more.

The week it takes to clone a SaaS is not a productivity anecdote. It is the new price of software: zero for the bits, plus whatever the servers cost. And that number is published.