Comparing Layer 2s: A Practical User's Guide

What you'll learn

• The Current TVL Leaderboard (Early 2026)
• The ZK Rollup Landscape
• Superchain, Orbit, and the App-Chain Trend
• Bitcoin's Path: Lightning Network in 2025
• EIP-4844 / Dencun: The Inflection Point
• Account Abstraction: ERC-4337 and EIP-7702 Today
• The Modular Stack: Celestia, EigenDA, Avail, and Restaking
• A Practical Decision Framework
• Bridging, Risk Frameworks, and Force-Include Mechanisms

Key terms

L2BEAT decentralization stages

A framework classifying rollups by maturity: Stage 0 (trusted operator), Stage 1 (core safety properties shipped, limited security council), Stage 2 (minimized trust, robust exit, hostile-operator-tolerant). As of early 2026 most major L2s are at Stage 1; few are at Stage 2.

Lighter

A specialized Layer 2 focused on perpetuals trading. Holds approximately 3.5 percent of the L2 market in early 2026, illustrating the trend toward vertical-specific rollups.

Superchain

Optimism's ecosystem of OP Stack rollups sharing security primitives. Includes Base, World Chain (Worldcoin), Mode, opBNB, Ink (Kraken, December 2024), Unichain (Uniswap, February 2025), and Zora.

Arbitrum Orbit

Arbitrum's framework for application-specific L3 chains built on the Nitro stack. Examples include Xai (gaming), Cyber, and Apechain. Orbit chains can settle to Arbitrum One or directly to Ethereum.

Mantle

BitDAO's rollup with a hybrid optimistic-rollup architecture, mainnet launched July 17, 2023. Independent of the Superchain and Orbit ecosystems.

Blast

A Layer 2 launched February 29, 2024 by Tieshun Roquerre (Pacman, Blur founder). Pioneered native yield on bridged assets — bridged ETH automatically earns staking yield.

EigenLayer / Restaking

A protocol for Ethereum validators to opt into securing additional services in exchange for rewards and additional slashing risk. Mainnet launched June 14, 2023; full operations April 9, 2024; slashing live April 17, 2025. TVL hit ATH 28.6 billion dollars September 2025.

EIP-7702 7702 authorizations

A Pectra upgrade feature (May 7, 2025) allowing existing EOAs to delegate to smart-contract logic without permanent migration. Approximately 14 million EOAs had signed at least one 7702 authorization by late 2025.

Otherdeed gas spike (May 1, 2022)

The Yuga Labs Otherside metaverse land sale that broke Ethereum gas auction records. Yuga collected over 561 million dollars in revenue while users burned an additional 176 million dollars in failed gas — the canonical example of pre-Dencun mainnet congestion.

Force-include / escape hatch

A mechanism letting users bypass a misbehaving rollup sequencer by submitting transactions directly to Ethereum mainnet, which the rollup is required to include. Higher-latency, higher-cost path that ensures censorship resistance.

Sequencer centralization

The fact that most L2s today run a single team-operated sequencer. The sequencer cannot steal funds but can censor or front-run. Decentralized sequencer networks are an active area of development.

Native bridge vs fast bridge

Native bridges (each rollup's official Ethereum contract) are the most secure but slow on the way out. Fast bridges (Across, Stargate, Hop) advance funds for a fee, taking the wait themselves. For non-trivial amounts, prefer native bridges.