I'm trying to give you the benefit of the doubt here, but trying to make a point that a new product "copied what [you] are doing" just seems inappropriate. Is there perhaps a better way that this could have been phrased?

Both products operate in the same space, and are attempting to solve similar problems, but as far as I can recall Release attempts to manage all environments from dev -> production, while Reploy is specifically targeting the developer experience around managing and sharing staging environments.

The concept of dynamic staging environments is not new; I've personally built in-house solutions to solve this problem years ago, well before Release went through YC. It's not really fair to say that anyone who comes out with a similar product is "copying Release".