Cardano is the first blockchain project to be peer reviewed by academic researchers. This level of scrutiny of the underlying technology is an industry first.
Further to this Cardano is unique in that it’s built on the Haskell coding language. Haskell is considered to be one of the most secure programming languages, minimizing the number of errors and adding extremely robust security to the platform.
More information can be found: https://whycardano.com/