The title says it all, really. I have a number of bootstrapped side projects, but beyond the absolute essentials (e.g. domain names and web hosting), my expenditure on these projects in basically zero.
But maybe I'm missing a trick here. Are there any paid services out there that you consider absolutely essential to running your startup/growing your product that are absolutely worth the investment, no matter how small your budget?
I'll start with the one service I pay for, beyond web hosting - GSuite, for managing emails (although I'm currently even trying to find a free alternative to that)