TLDR
Arbitrum (ARB), ethereum/">Optimism (OP), Base, and ZK rollups like ZKsync, Scroll, and Taiko are the Layer 2s most cited for pushing more transactions to Ethereum for final settlement this week. See examples in reporting on ZK rollup progress and named networks and in notes on L2 revenue flowing to L1 security.
- Named L2s: Arbitrum, Optimism, Base, ZKsync, Scroll, Taiko are highlighted as boosting L1 settlement. This is reflected in recent coverage of ZK rollups and L2 economics.
- Evidence: Ethereum hit record on?chain activity with lower fees, and a large share came from L2s settling on L1.
- Value flow: L2s pay Ethereum for data availability and security; analyses point to Arbitrum, Optimism, Linea, and Base in recent L2?to?L1 flows.
Deep Dive
1. Leading L2s
Recent analysis names Arbitrum (ARB), Optimism (OP), Base, and ZK?centric rollups such as ZKsync, Scroll, and Taiko as the main L2s expanding throughput while settling on Ethereum. A technical overview highlights ZKsync, Taiko, Scroll, Base, and Arbitrum as beneficiaries of upcoming ZK and interoperability upgrades, directly tying their growth to Ethereum settlement capacity. A separate economics piece discusses Arbitrum, Optimism, Linea, and Base among L2s whose designs route data and proofs to L1.
If you track ETH as a settlement asset, these L2s are the practical conduits turning user activity into L1 commitments.
2. Settlement Evidence
Multiple reports show Ethereum L1 activity rising while fees stay low, with a large share attributed to L2s settling back to mainnet. One recap notes a single?day record of about 2.2 million L1 transactions alongside ~$0.17 average fees, framing Ethereum as a high?capacity settlement layer even as L2 ecosystems expand. Another article explicitly links the surge in L1 usage to L2 settlement plus steady DeFi and stablecoin transfers.
Higher L2 usage can increase L1 settlement without recreating past fee spikes, supporting the ETH as settlement layer thesis.
3. Value Flow
Coverage of L2 economics indicates that rollups pay Ethereum for data availability and security while retaining more end?user fees after 2025 fee cuts; Arbitrum (ARB), Optimism (OP), Linea, and Base are cited in this context. This illustrates how L2 execution can expand while still anchoring trust and finality on Ethereum.
Settlement remains a revenue and security linkage between L2s and Ethereum, even as most execution moves off L1.
Conclusion
The L2s most often tied to boosting Ethereum settlement this week are Arbitrum, Optimism, Base, and ZK?rollups like ZKsync, Scroll, and Taiko. Recent records in mainnet activity with low fees align with a model where L2s handle execution and post data or proofs to L1, reinforcing Ethereums role as a high?capacity settlement layer while keeping user costs manageable.
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