Since Rubic aggregates several DEXs, users can execute On-Chain Swaps on Ethereum, Polygon, BNB Smart Chain, Avalanche, Fantom, Fuse, Harmony, Moonriver, Solana, Near, Aurora, Telos, Arbitrum, Gnosis, Celo, Optimism, Moonbeam, OKC and Cronos networks. By utilizing external DEXs, users are ensured the best possible rates.