I'm inclined to be sympathetic to the OP, but looking at both products side-by-side, including their API docs, they just seem like two similar but not identical

I'm inclined to be sympathetic to the OP, but looking at both products side-by-side, including their API docs, they just seem like two similar but not identical products in the promotions space. https://vouchery.io https://vouchery.io https://rehook.ai https://rehook.ai The APIs look fairly different to me from a brief look through the docs. Apart from both using some resource names like 'Campaigns' and 'Customers' that you'd expect any platform in this space to use, most of the actual endpoints seem to be quite different. Same with the overall set of features. There are some features in common, but also features on both sides that aren't shared. Website design and copy is totally different. It seems like OP is unhappy that a competitor is funded by YC and did competitive research in their public community Slack channel. I get that, but I see no evidence that anything was directly copied. It doesn't seem fair to tarnish the reputation of Rehook's founders without evidence to back it up. It's not wrong or illegal to build a competitor to an existing product.