Black Rhinos by Sumo might be a bit more popular than Startup First Users. We know about 1 link to it since March 2021 and only 1 link to Startup First Users. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Cool little resource I found https://earlyusergrowth.com/startups/. Source: about 3 years ago
I recommend reading the free book "Black rhinos" https://sumo.com/stories/marketing-book this book is not only about marketing but about how people tested their ideas, build them from scratch, developing them. Source: almost 3 years ago
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