What is a SaaS?
4 min read · Online software that customers pay for every month to solve one specific problem.
A simple definition
SaaS stands for "Software as a Service." In plain terms, it's a tool that runs in the browser. Your customer doesn't install anything. They sign up, log in, and use it.
You've almost certainly used SaaS already: web email, video calls, shared spreadsheets, invoicing tools. All of them are online software.
The subscription model
Most SaaS products are paid for with a subscription. The customer pays monthly or yearly for as long as the tool is useful to them. When it stops being useful, they cancel.
It's a straightforward deal:
- you keep the tool running, fix it, and improve it;
- your customer pays as long as it keeps helping them.
A subscription forces you to stay useful. A customer who no longer sees the value leaves. That's demanding, but it's healthy.
Small doesn't mean pointless
A SaaS doesn't need to be huge. Plenty of small SaaS products do one thing for one kind of customer. Some common types:
- a vertical tool: booking for hair salons, job tracking for contractors;
- a productivity tool: scheduling social posts, summarizing meetings;
- a data tool: a dashboard that pulls scattered numbers into one place;
- an AI-powered tool: writing product descriptions, sorting email, analyzing documents;
- an add-on that brings a new feature to software people already use.
What they share: one specific problem that comes up often, for people who want it gone.
What a SaaS is not
It's not a service where you do the work by hand for each client. It's not a store selling physical products. It's not a marketplace connecting buyers and sellers. Those models are real, but they work differently.
Key takeaways
- A SaaS is online software, used in the browser, paid for with a subscription.
- It has to stay useful every month, or customers leave.
- A small tool that solves one problem for one audience is a real SaaS.
Your action
List 5 online tools that you or people around you use. For each one, write one sentence: what problem it solves and who pays for it. You'll notice the best ones fit in a single sentence.