Launched in 2021 and founded by SOLBigBrain, HowRare.is shows how rare a Solana NFT is. Users can find all the NFT collections along with their parameters such as floor price, items, holders, on sale, % on sale, and floor MC (USD) on the main page. Developers can use the API to use data endpoints from HowRare.is regarding collections, drops, rarity and others.