By What Is Solana (SOL)? The Fast, Low-Fee Blockchain Explained
Bitcoin settles a block every 10 minutes. Ethereum's base layer, even after years of upgrades, still measures throughput in the tens of transactions per second. Solana was designed from day one to do neither of those things, aiming instead for the kind of speed that makes a blockchain feel roughly as fast as a normal app.
Where the speed actually comes from
Solana's core trick is something called Proof of History, invented by co-founder Anatoly Yakovenko and laid out in a 2017 whitepaper. Rather than having validators spend time agreeing on when each transaction happened, Proof of History creates a verifiable, ordered timestamp built into the data itself, so the network doesn't have to negotiate timing from scratch for every single block. That's paired with a separate proof-of-stake mechanism for choosing who validates each block, and the combination is what lets Solana process a large volume of transactions with sub-second finality.
What that translates to in practice
Transaction fees on Solana are typically a small fraction of a cent, and confirmations land in well under a second under normal conditions, a real change of pace from waiting on a Bitcoin block or paying Ethereum gas during a busy period. This is a big part of why applications needing rapid, cheap transactions, certain trading platforms and games among them, have gravitated toward building on it.
The reliability problem, honestly stated
Speed came with real growing pains. Solana suffered a string of network outages in 2021 and 2022, some lasting many hours, generally traced to the network being overwhelmed by transaction spam or resource exhaustion during periods of extreme demand. The project has spent the years since working on this directly, including client software diversity and fee-market changes designed to make spam-driven congestion far more expensive to pull off, and outages have become substantially less frequent as a result. It's a fair thing to weigh against the speed, not a reason to dismiss the project outright, but not something to leave out either.
What SOL is actually for
SOL is the network's native token, used to pay transaction fees and to stake with validators who help secure the network, similar in role to ETH on Ethereum. Solana also supports smart contracts, so it hosts a broad ecosystem of applications well beyond simple payments, decentralized exchanges and NFT platforms in particular have been especially active there.
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Solana trades some of Bitcoin's and Ethereum's decentralization and track record for raw throughput and cost. Whether that tradeoff makes sense depends entirely on what you're actually trying to do with it. For how Bitcoin approaches a similar speed problem without changing its base layer at all, see the Lightning Network.