Filecoin, created by Juan Benet (who also created IPFS — the InterPlanetary File System), launched in October 2020 as a decentralized storage marketplace. The concept: instead of storing data on Amazon S3 or Google Cloud, users pay storage providers (miners) in FIL tokens to store files across a distributed network. Storage providers earn FIL by proving they’re reliably storing data over time.
The protocol uses two novel consensus mechanisms: Proof of Replication (proving that a unique copy of data has been stored) and Proof of Spacetime (proving that data continues to be stored over time). These mechanisms ensure that storage providers actually store the data they claim to — a fundamental challenge for decentralized storage that naive approaches (simply trusting providers) can’t solve.
Filecoin’s network grew to store enormous amounts of data — over 22 EiB (exbibytes) of storage capacity by 2024. However, a significant portion of this was “junk data” stored by providers to earn mining rewards rather than genuine customer data. The “useful storage” problem — incentivizing storage of actually demanded data rather than self-generated data to mine rewards — remained a persistent challenge.
Filecoin Virtual Machine (FVM), launched in 2023, brought smart contract capability to Filecoin, enabling DeFi and applications on top of the storage network. This expanded Filecoin from a pure storage protocol to a general-purpose blockchain with storage as its unique value proposition. The FIL token, while down significantly from its all-time high, maintained a multi-billion dollar market cap. Filecoin competes with Arweave (permanent storage), Sia, and Storj in the decentralized storage space, but its backing from Protocol Labs, ICO funding ($257 million in 2017), and IPFS integration give it the largest ecosystem and most storage capacity.
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