At a glance
Uniswap V3 ↗ and Uniswap V4 ↗ represent two generations of the dominant DEX infrastructure. V3, launched 2021, solidified concentrated liquidity and today holds $4B TVL across 9 chains. V4, launched 2025, re‑architects the AMM as a singleton with hooks, flash accounting, and native customizability. V3 is the battle‑tested liquidity giant; V4 is the programmable upgrade aimed at developers and cost‑sensitive LPs.
Key differences
Architecture: V3 is a standard factory model where each pool is a separate contract. V4 uses a singleton contract—all pools live in one contract—enabling hooks that let developers embed custom logic into pool actions. This reduces deployment costs and unlocks dynamic fees, on‑chain limit orders, and exotic curves.
Liquidity and reach: V3 commands $4B TVL across 9 chains (Ethereum, Arbitrum, Optimism, Polygon, Base, BNB, Avalanche, Celo, Blast). V4 is at $1.5B TVL on 6 chains (Ethereum, Arbitrum, Optimism, Polygon, Base, Unichain). V3’s deeper liquidity pools typically mean tighter spreads for large trades.
Gas efficiency: V4’s flash accounting leverages netting across swaps within a block, significantly reducing gas per trade versus V3’s per‑pool accounting. For LPs, V4’s singleton also lowers the overhead of position management.
Security and track record
Both protocols have been audited by top firms; V3 by Trail of Bits, ABDK, and samczsun; V4 by Trail of Bits, Spearbit, and Certora. Neither has a known exploit as of May 2026. V3’s four‑year live tenure without incidents establishes a stronger empirical safety record. V4’s hooks, while audited, introduce a larger attack surface—custom logic can contain vulnerabilities. V3 remains the more battle‑tested option, though V4’s audit scope matches its novel complexity.
Fees and costs
V3 offers multiple fixed fee tiers (value not disclosed in our data) that LPs choose on pool creation. V4 enables dynamic fees via hooks, potentially better aligning costs with volatility. Gas costs diverge sharply: V4’s flash accounting significantly cuts swap gas overhead relative to V3, making frequent or small trades cheaper. Exact savings depend on pool configuration and chain; check the Uniswap docs for current estimates.
Which should you choose
Pick Uniswap V3 ↗ if you prioritize deep, battle‑tested liquidity across the most chains, or if you’re trading in size and need tight spreads. V3’s simplicity also suits those who want a straightforward, proven AMM experience.
Pick Uniswap V4 ↗ if you’re a developer building custom DeFi strategies, an LP seeking lower gas costs and dynamic fee adjustments, or if you trade frequently and want the cheapest possible gas per swap. V4’s hooks open doors to entirely new pool types unavailable on V3.
Verdict
This matchup is context‑dependent. For the typical trader, V3’s $4B in deployed liquidity and multi‑chain dominance make it the pragmatic choice. V4’s design is a generational leap, but it’s still ramping up liquidity. Power users and builders get the most from V4; everyone else benefits from V3’s established network effect.