Flatfile took more than $50m in venture funding. It's not clear to me if they're profitable or not. With such funding you can hire senior sales people, marketing agency, build prototypes for customers, build integrations, travel to your customers, survive very long enterprise sales cycles, build infrastructure for 10x or 1000x of your current need... all while actively loosing money. No single developer can match that. They've likely outspend their competition on every level.