"Should we build this or just buy a SaaS tool?" is one of the most common questions we hear from growing businesses, and it doesn't have a universal answer. It depends on what the software actually needs to do for your business, and how much that thing is a source of competitive advantage versus a solved problem.
SaaS is built for the average business
A SaaS product is designed to work reasonably well for thousands of companies at once. That's its strength: low upfront cost, fast setup, and someone else maintaining it. It's also its limit: a tool built for the average business will never fit your business exactly, because it wasn't built for you.
For problems that are genuinely generic, such as email, accounting, or basic project tracking, that tradeoff is usually the right one. Paying to reinvent a solved problem rarely makes sense.
Custom software earns its cost when the process is the advantage
The calculation changes when the process in question is specific to how your business operates, or when it's actually part of what makes your business better than competitors. If your pricing logic, your operational workflow, or your customer experience is meaningfully different from a generic template, forcing it into SaaS software usually means working around the tool instead of the tool working for you.
A few questions that tend to clarify which side of the line you're on:
- Are we adapting our process to fit the software, or is the software actually fitting our process?
- Would a competitor using the exact same SaaS tool have any real disadvantage?
- Is this process going to keep changing as we grow, in ways a generic tool can't keep up with?
If the honest answer points toward "this is genuinely how we're different," that's usually a sign custom software is worth the investment. If not, buying the SaaS tool and moving on is almost always the better use of time and money.
It doesn't have to be all-or-nothing
Many businesses land somewhere in between: keep SaaS tools for the generic parts of the business, and build custom software, or a backend and API layer, specifically for the parts that are actually core to how the business runs and competes. That's usually a more honest starting point than treating it as a single company-wide decision.