Layer 2 Solutions Explained: Why Crypto Fees Are Falling

Layer 2 networks solve Ethereum's speed and cost problems by processing transactions off the main chain. Here is how they work and which ones matter.

Ethereum's base layer is deliberately slow and expensive. Layer 2 networks solve this by processing transactions in batches off-chain and periodically settling to Ethereum. The result: £20–100 gas fees become $0.05–0.30 transactions.

How Layer 2s Work

• Transactions happen off the Ethereum mainnet, in a separate environment
• Hundreds of transactions are bundled and compressed into a single proof
• This proof is submitted to Ethereum mainnet — cheaper per transaction than individual submissions
• Optimistic rollups (Arbitrum, Optimism): assume transactions are valid, challenge period for fraud
• ZK rollups (zkSync, Starknet): cryptographic proof of validity, faster finality

The Major Layer 2s in 2026

• Arbitrum: largest L2 by DeFi TVL, mature ecosystem
• Base (Coinbase): fast growing, deeply integrated with Coinbase, low fees
• Optimism: strong governance, OP Stack powers a superchain
• zkSync Era: ZK rollup with strong developer traction
• Steyble supports all major L2s — transact on whichever has the lowest fees

The Practical Benefit

On Ethereum mainnet, a simple token swap costs £10–50 in gas. On Arbitrum via Steyble, the same swap costs $0.05–0.30. This is a 50–1000x reduction in cost. Steyble automatically routes transactions to the most cost-effective network for each operation.