Arweave

Arweave offers permanent, one-time payment decentralized storage using its blockweave architecture. It targets data permanence for NFTs, archives, and web content. Compared with Protocol Labs' Filecoin, Arweave emphasizes simpler pricing and stronger immutability guarantees but lacks the broader startup network and multi-technology research scope. It appeals to users needing long-term storage without ongoing fees or complex retrieval markets.