Why use AI to build databases and internal dashboards instead of buying SaaS?

The math has flipped: AI coding tools have collapsed the cost of custom software, so a founder can now get a tool shaped exactly to their workflow for less than a year of SaaS subscriptions. Retool's own research found 35% of teams have already replaced at least one purchased tool with something custom-built, and small companies are quitting Salesforce for Claude-built CRMs. Buying still wins for commodity needs like email and payroll; building wins when the workflow is your edge or the SaaS forces you into its shape.

A quick orientation. The real value is below: resources worth your time, from people who've actually done it.