← Back to Networks archive
Network Comparisons
Arbitrum vs Optimism
Compare Arbitrum and Optimism as Ethereum Layer 2 networks for swaps, wallets, bridges, fees, and common user errors.
Network map
What this means
Arbitrum and Optimism are EVM-compatible Layer 2 networks with similar wallet flows but separate liquidity, apps, explorers, and bridge paths.
Core ideas
What to understand first
- Both networks commonly use ETH for gas.
- Both are EVM-compatible.
- Each network has different apps and liquidity pools.
- Token contracts are chain-specific.
User checklist
What to check before moving assets
- Confirm the selected chain in your wallet.
- Use the correct explorer.
- Verify token contract addresses on the target network.
- Check bridge source and destination carefully.
Risk note
Common mistakes to avoid
- L2 network confusion can cause failed swaps or missing balances.
- Bridge delays are normal in some cases.
- Fake support links target users with delayed bridge transfers.