I found today another competitor for you. Exchain posted their announcement today. What do you think about them?
Hello, thank you for your observation! It might be a bit early to say much about it, since they seem to be on a quite early stage right now with no actual product to see (according to the WP their beta launch is planned on Oct. 2018). They aim to eradicate fraudulent traffic and bring transparency using blockchains and smart contracts, which sounds promising, but technically not clear - how all of the ad events would be processed using regular blockchains? Papyrus has released its specific solution for that in a form of blockchain scalability for such immense amounts of data. So as for now it seems they have strong emphasis made on eradicating fraudulent financial sources and financial control, while Papyrus has wider range of implementations with its full processing of all the ad events going through. And it is already working in a form of our MVP on our website
https://papyrus.global/