Business & growth
What is micro SaaS?
Micro SaaS is a small software-as-a-service business serving a narrow, specific market, usually run by one person or a very small team with low operating costs.
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Technical definition
Micro SaaS describes a subscription software product built for a narrowly defined audience and operated with minimal headcount and infrastructure. The model relies on a focused feature set, a specific customer segment, low fixed costs, and organic or community-led distribution rather than a sales organization.
It is distinguished from conventional SaaS by intent rather than scale. A micro SaaS is designed to be profitable while small, not to grow into a large company.
In plain terms
Micro SaaS is a small software product that solves one problem for one type of customer, run by one person.
Not a startup aiming at a billion-dollar market. A tool 400 people pay 30 dollars a month for, run by someone who understands those 400 people.
Why it matters
The economics used to rule this out. Building the product took months or a developer's salary, so a market of a few hundred customers could not justify it. Software went where the markets were large, which is why so many niches are still served by spreadsheets.
AI building changed the input cost, and that is the whole argument for micro SaaS now. When the build is a week rather than six months, a few hundred customers is a real business.
What makes one work is domain knowledge rather than technical skill. The people best placed to build a tool for dental practice scheduling, or for equine veterinarians, or for community theater box offices, are people who have worked in those fields and know exactly where the existing tools fail. That knowledge is the moat; the software is the easy part now.
The practical constraint is that you are also running it. Support, billing, and reliability all land on one person, which is a reason to keep the product narrow rather than to add features.
