What Uniswap is in 2026
Uniswap is the original AMM DEX and remains the largest by trading volume. Launched on Ethereum in 2018 by Hayden Adams, Uniswap pioneered the constant-product market maker (x × y = k) that defines most modern DeFi liquidity. Multiple versions (V1, V2, V3, V4) have built on each other; V3 and V4 are the active deployments in 2026.
V4 and hooks
Uniswap V4 launched in 2024 with hooks — customisable smart contract logic attached to individual pools. Hooks enable dynamic fees, native limit orders, on-chain TWAP oracles, single-pool concentrated liquidity, and dozens of other patterns that previously required separate protocols. V4 has gradually drawn liquidity migration from V3.
The fee switch
After years of governance debate, UNI holders activated the fee switch on select V3 and V4 pools in 2024–2025. A portion of LP fees flows to UNI stakers (where activated) or the Uniswap Treasury. This is the first direct revenue capture mechanism for UNI; activation continues to expand pool-by-pool through governance.
Security record
Uniswap has processed over $2.5T in cumulative trading volume across multiple versions without a protocol-level exploit. Multiple independent audits, formal verification of core invariants, and battle-tested operational history make Uniswap one of the most trustworthy single protocols in DeFi.
Who Uniswap fits
Anyone trading ERC-20 tokens on Ethereum or major L2s. LPs wanting deep aggregate liquidity in major pools. UNI holders wanting governance influence and (increasingly) revenue capture. The default DEX for most Ethereum DeFi users.