What is Solana?

Solana is a high-throughput layer-1 blockchain that combines proof-of-stake with a unique ordering mechanism called Proof of History (PoH), enabling it to process thousands of transactions per second at sub-cent fees without relying on sharding or layer-2 solutions. Designed explicitly to compete with Visa-scale payment volumes in a single-shard architecture, it has become the dominant chain for consumer-facing crypto applications including meme coins, NFT trading, and retail DeFi. Its performance advantages come with a documented history of network instability.

Solana's architecture separates time-ordering from consensus: validators use PoH (a verifiable delay function producing a cryptographic clock) to agree on event ordering before the heavier BFT consensus step. This pipeline allows parallel transaction processing and accounts for the throughput claims of 50,000+ theoretical TPS, though sustained real-world throughput under load has typically been lower. The runtime model processes transactions against 'accounts' stored in memory, making Solana fundamentally optimized for hardware with large RAM and fast SSDs — validator costs are substantially higher than on Ethereum, which affects decentralization.

Solana's most documented weakness is network reliability. The chain suffered multiple complete or partial outages between 2021 and 2023, with causes ranging from bots flooding the transaction queue to consensus bugs to resource exhaustion from NFT minting traffic. Validators have had to restart the network via coordinated off-chain communication — a process that can take hours and underscores the role of a relatively small, identifiable validator set. The FTX/Alameda collapse in November 2022 also hurt Solana disproportionately: FTX and Alameda were major investors, validators, and ecosystem backers, and SOL lost roughly 95% of its peak value during that period before recovering.

Reviewed by the 2Bitcoins Editorial Team · Updated June 2026. Not financial advice.