Portals, a Solana-based NFT metaverse project, has raised $5 million in seed funding with the goal of realising its metaverse vision on the Solana blockchain. Greylock led the round, with Multicoin Capital, Solana Ventures, Alameda Research, Sino Global Capital, and Mantis, a venture capital firm created by American EDM duo The Chainsmokers, also participating. Justin Kan, co-founder of Twitch, also contributed to the round.