Solana

Solana is a blockchain platform launched in 2020, built specifically for high transaction throughput and low fees — a direct response to the scalability limitations that made early blockchains like Ethereum slow and expensive during periods of heavy demand. It was founded by Anatoly Yakovenko, a former Qualcomm engineer.

Solana's core technical innovation is "proof of history," a method for cryptographically timestamping transactions before they're grouped into blocks, which lets the network order and validate transactions far faster than blockchains that rely purely on validators reaching consensus on ordering in real time. It's combined with a proof-of-stake consensus layer for security.

Because of its speed and low transaction costs relative to Ethereum, Solana is widely used as an infrastructure layer for decentralized finance applications, NFT marketplaces, and consumer-facing crypto apps that need near-instant, cheap settlement — trade-offs that have made it one of the most actively used non-Ethereum smart-contract platforms, though it has also experienced a number of network outages over its history that critics point to as evidence of trade-offs made for speed.