Build vs. buy: the real cost of an internal tool
SaaS looks cheap until you count the workarounds. Buy the commodity; build the thin layer that’s genuinely yours.
The sticker price of an off-the-shelf tool is rarely the real cost. The real cost is the workarounds — the export-to-spreadsheet step, the second tool you bought because the first didn’t quite fit, the process everyone learned to tolerate.
For commodity needs — email, accounting, payroll — buy. These problems are solved, and solved better than you could justify building.
Build when the tool encodes how your business actually works. The dashboard your ops team lives in, the portal your clients log into, the internal app that matches your process exactly — that’s where a thin custom layer pays for itself in saved hours and fewer mistakes.
The trap is building the commodity and buying the differentiator — exactly backwards. You end up maintaining your own email server while forcing your unique workflow through a generic CRM.
Modern tools like Supabase make the build side cheaper than it used to be. A focused internal tool is often a few weeks of work, not a few quarters.