| Specification | |||
|---|---|---|---|
| Provider | StarkWare | Layerswap | Owlto Finance |
| Actions | |||
| Chain | mainnet | mainnet | mainnet |
| Technology | Native L1↔L2 Token Bridge | Cross‑chain Swaps | Cross‑rollup Bridge |
| Open Source | Yes | Yes | Yes |
| Support | Email, Bridge UI | Discord | Discord |
| Supported Chains | — | Ethereum, Polygon, Linea, Base, BNB Chain, opBNB, Arbitrum One, Optimism, Arbitrum, OP Mainnet, Avalanche, Solana, Hyperliquid, HyperEVM, Gnosis, Sonic, Cronos zkEVM, Abstract, Berachain, Story, Neon, Flow, BOB, Mantle, Sophon, Sei | Eclipse, Soneium, Katana, Unichain, Ink, Abstract, Base, Arbitrum, Ethereum, Linea, Optimism, AlienX, Arbitrum Nova, Avalanche, Bera, Blast, BNB Chain, BOB, B², Core, Cyber, Duckchain, Gnosis, Goat, Gravity, HashKey, Hemi, Lens, Lisk, Manta, Mantle, Matchain, Merlin, Metis, Mint, Mode, Morph, opBNB, Over, Polygon, Polygon zkEVM, RARI, Redstone, Scroll, Shape, Solana, Soon, svmBNB, Sonic, Story, Swan, Taiko, U2U Solaris, WorldChain, X Layer, Zeta, zkSync Era, Zero, Zircuit, Zora |
| Price | Gas Fee | Gas Fee + small service fee | Gas Fee + protocol fee |
| Asset Types | ETH, ERC-20 | ETH, ERC‑20 | ETH, USDC, USDT |
| TX Speed SLA | — | — | — |
| Throughput SLA | — | — | — |
| Available APIs | Deposit, Withdrawal | Asset Transfer | Asset Transfer |
| SDK | Cairo | Web UI | Web UI |
| Monitoring & Analytics | — | — | — |
| Additional Features | Starknet Messaging, ETH & ERC-20 Support | Exchange <> L2 bridging | Fast confirmation, Low fees |
| Decentralization | Semi-Decentralized | Semi-centralized | Hybrid |
| Economical Security | Yes | Yes | Yes |
| Economical Security Note | Official StarkWare implementation | Bridging secured through centralized custody & partners | Relayer-based verification with ZK/optimistic fallback |
| Audits Performed | Starknet Audits | — | — |
No | No | No |