Yes, there are quite a lot. E.g. Virtualmin, which IIRC had been around for about a year before YC. Or Airbnb, which had been for almost that long. We don't

Yes, there are quite a lot. E.g. Virtualmin, which IIRC had been around for about a year before YC. Or Airbnb, which had been for almost that long. We don't encourage or discourage it. We care much more about how good companies are than how long they've been working.