What AVAX is
Avalanche is a Layer 1 blockchain platform launched in September 2020 by Ava Labs, founded by Cornell professor Emin Gün Sirer. Avalanche's architecture is unusual: it consists of three primary chains (the X-Chain for asset transfers, the C-Chain for EVM-compatible smart contracts, and the P-Chain for staking and validator coordination) plus an unbounded number of "subnets" (custom blockchains that share the validator set and security model).
How it works
Avalanche introduced a novel consensus protocol that uses repeated random sub-sampling of validators to achieve probabilistic finality in under one second. Validators stake AVAX (minimum 2,000 AVAX) to participate. Each subnet selects which validators secure it, enabling regulatory-friendly deployments (e.g., KYC-only chains for financial institutions) without compromising the public chains.
Use cases
The C-Chain is EVM-compatible and hosts a DeFi ecosystem similar to other EVM chains. Subnets are used by gaming projects (DeFi Kingdoms had its own subnet), institutional players, and projects needing sovereign control over chain parameters. AVAX is used as gas, staking collateral, and the bridge asset between subnets.
Tradeoffs and criticism
Avalanche's subnet model is technically interesting but adds complexity and requires understanding which chain to use for which purpose. The DeFi ecosystem on the C-Chain has grown but remains smaller than Ethereum or Solana. Validator hardware requirements are moderate (more than Ethereum, less than Solana).
Where to track AVAX
See the validator entry for staking context.