Revain is a blockchain-based feedback platform similar to Yelp. Users are incentivized by businesses to leave public feedback on Revain’s ledger. There is a reputation system where users are incentivized to review one another to determine who earns RVN tokens. RVN can be swapped for R tokens, which can then be traded on exchanges.The platform is said to use blockchain technology to ensure decentralization and unbiased reviews, and AI and IoT to prevent fake reviews and help businesses improve. See full review