I find large orgs tend to build inhouse tools as they get bigger. But you're never going to get big if you start optimizing for late stage scaling needs before you've even found your market footing.
I worked with a bunch of early stage startups, they don't need to build a lot of features like marketable products. Lots of scripts and poor ui will do just fine with manageable maintenance (devs even like their poor invention .. hope they would opensource it)
