A micro-SaaS is a small subscription software product that solves one narrow problem for a specific group, typically run by one person or a tiny team.
Typical examples are an add-on for a larger platform, a tool for one profession, or one feature of a big product done better on its own.
The narrowness is the point. A small market is too small to interest large companies, yet large enough to pay one maker's living.
Why it matters for a launch
A micro-SaaS is easier to describe, easier to place in a directory category, and easier to find its users for, which makes launching it far simpler than launching a broad product.
Read more: How to launch a product