In the start up world, what comes around, goes around. Ethics, trustworthiness, honesty...these are all important factors. All of the angels and VC's I've been

In the start up world, what comes around, goes around. Ethics, trustworthiness, honesty...these are all important factors. All of the angels and VC's I've been around would very likely walk away from people like this. Maybe it was an oversight, maybe it was intentional...but most investors will suss out douchebaggery pretty quickly and ask very direct questions. If you lie at this point, you're not getting funded. If you somehow manage to get funded and the lie remains uncovered, that's highly unusual. There's really not much you can do though. Maybe politely request the start-up acknowledge the work you did. But if it were me, I'd just let it go and move on. If you're sensitive about this sort of thing, you probably shouldn't release your code open source. By the way, I'm familiar with the feelings. I had a private commercial library for years. The second I open-sourced it, at least two companies started using it in their commercial endeavors.