I've recently shipped a new tool, the SaaS vs DIY Cost Calculator. This spreadsheet is designed to help you quickly compare the annual financial outlay for a SaaS subscription against the costs of building and maintaining a custom in-house solution.
The calculator provides fields to input the annual subscription cost for a SaaS product. For the DIY side, it allows you to estimate development time, ongoing maintenance hours, and factors in a per-hour rate for developers. Additionally, it includes a section to account for potential AI usage costs, which is relevant for many custom solutions today.
The goal is to offer a clearer picture when making a build vs. buy decision, moving beyond just the sticker price of a SaaS and considering the less obvious costs of custom development and upkeep. It's built for founders, developers, and small teams who need a structured way to evaluate these options.
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