Key Takeaways
- Arbitrum leads all L2s in DeFi TVL at US$18.4B, with GMX and Aave v4 as its anchor protocols.
- Base has surpassed Optimism in daily active addresses, driven by Coinbase’s user funnel and Aerodrome DEX.
- Optimism’s Superchain a network of OP Stack chains sharing a sequencer and messaging layer has grown to 22 member chains.
- Post-Pectra, all three L2s have reduced transaction fees by 40–65%, with Base averaging US$0.0008 per transaction.
- The ARB token has underperformed its L2 peers in 2026; OP and Coinbase Base ecosystem tokens have significantly outpaced ARB YTD.
Ethereum’s Layer 2 ecosystem has consolidated around three dominant optimistic rollups: Arbitrum, Optimism, and Base. Each has taken a distinct strategic approach, and the differences are becoming increasingly apparent in their metrics.
Arbitrum: The DeFi-First Ecosystem
Arbitrum has built the most diverse and liquid DeFi ecosystem among all L2s, with US$18.4B in TVL anchored by Aave v4 (US$5.2B), GMX perpetuals (US$1.8B), and a deep stablecoin ecosystem. GMX became the dominant on-chain perpetuals exchange during the 2022–23 bear market and generated over US$200M in cumulative fees one of the few DeFi protocols that has consistently generated revenue regardless of market cycle.
The challenge: ARB token performance. Despite strong protocol metrics, ARB has underperformed ETH in 2026, with large venture capital allocation unlocks suppressing price discovery through 2027.
Base: Coinbase’s Trojan Horse
Base is an OP Stack rollup launched by Coinbase that has become the most interesting growth story in the L2 space. Coinbase’s competitive advantage is its user funnel: 110 million verified users with an increasingly seamless bridge to on-chain activity. Daily active addresses on Base surpassed Arbitrum for the first time in February 2026 and has maintained that lead for four consecutive months. Aerodrome Finance a DEX built specifically for Base has become the primary liquidity venue with over US$3.2B in TVL.
| Metric | Arbitrum | Base | Optimism |
|---|---|---|---|
| DeFi TVL | US$18.4B | US$9.8B | US$4.1B |
| Daily Active Addresses | 610K | 890K | 220K |
| Avg. Transaction Fee | US$0.0012 | US$0.0008 | US$0.0009 |
| Monthly DEX Volume | US$58B | US$44B | US$12B |
Optimism: The Superchain Vision
Optimism has taken the most ambitious strategic approach: rather than competing for DeFi TVL directly, it is attempting to become the standard for an entire network of L2s. The Superchain a collection of OP Stack-based chains sharing bridging infrastructure, a sequencer, and governance now includes 22 member chains including Base, Worldchain, Zora, and Mode Network. Revenue from sequencing across all Superchain members flows to the Optimism Collective treasury.
Which L2 Has the Strongest Moat?
For pure DeFi TVL and protocol quality, Arbitrum maintains the lead with network effects that are difficult to dislodge. For user growth and long-term retail distribution, Base’s Coinbase integration gives it structural advantages no DeFi-native project can replicate. For protocol revenue and ecosystem infrastructure value, Optimism’s Superchain bet is the most asymmetric either it becomes the standard and OP accrues enormous value, or it doesn’t. For Canadian DeFi participants, all three chains are accessible through standard wallet connections, with Coinbase’s integration making Base particularly easy to onboard from a Coinbase account.