Buying is faster and cheaper on day one. Building wins when the workflow is the business. The mistake is comparing a licence fee to a build fee instead of comparing three years of total cost and fit — the same comparison we walk clients through before any custom software build.
Four questions that decide it
- Is this workflow how we compete, or just admin overhead?
- Does an existing tool cover 80% without exports and workarounds?
- What will per-seat licensing cost at the team size we plan to reach?
- Is the real problem the tool, or the integration between tools?
Where SaaS wins
- Commodity functions: accounting, payroll, email, storage, helpdesk.
- Fast start with a small team and no engineering capacity.
- Compliance features you would not want to build yourself.
Where custom wins
- Your process is unusual and gives you an edge.
- Seat costs scale faster than your revenue.
- The value is in joining systems no vendor connects.
- You need data ownership and full control of the roadmap.
The hybrid most businesses should choose
Keep SaaS for commodity work, build the thin layer that is genuinely yours, and integrate them properly. That is usually a custom dashboard or CRM layer over the tools you already pay for — far cheaper than replacing everything, and it is the shape most of our business systems work takes. You can estimate the cost here.
