We are aware of some similar projects (like Gnosis, Augur, Aeternity, Oraclize, Chainlink and others), however all suffer from different downsides that are addressed by Zap.

You're welcome to take a look at our whitepaper: https://www.zap.store/whitepaper.pdf that provides a deeper insight on what Zap is capable of and how it differs from similar projects.