Rabby Wallet review: a security engine that actually reads the transaction

We run a MetaMask wallet for testing every review that touches DeFi, so switching our daily driver to Rabby for six weeks meant giving up muscle memory to see whether DeBank's safety pitch holds up against real contracts, not demo ones. Rabby is built by the team behind DeBank, the DeFi portfolio tracker many of us already used to check balances across chains, and the wallet inherits that same multi-chain habit rather than treating Ethereum as the only network that matters.

What the security engine actually catches

Rabby's pitch is that it simulates a transaction before you sign it, showing the real token balance change rather than a raw hex string. In practice that meant two moments during our test where a swap on an unfamiliar router would have drained more of a token than the interface suggested, and Rabby's preview flagged the mismatch before we clicked confirm. MetaMask's own preview caught one of the two. Neither wallet is magic: both rely on simulating the call against current chain state, and a contract designed to behave differently only when it detects a simulation could still slip past either one. Rabby's batch-revoke tool also let us clear nine stale token approvals from a defunct NFT mint in a single action, instead of hunting through Etherscan one contract at a time.

The Gas Account is the feature we didn't expect to use

Every EVM wallet has the same annoyance: you cannot pay a chain's gas fee without first holding that chain's native token, so bridging ten dollars of ETH to a new L2 just to try one dapp is common and wasteful. Rabby's Gas Account lets you deposit funds once and draw on that balance to cover fees across its supported chains, so a transaction on a network you have never touched still goes through. It is a small convenience with an outsized effect on how often we actually explored new chains during testing, rather than avoiding them because setup felt expensive.

The swap fee comparison that made the difference

Rabby introduced a 0.25 percent fee on its built-in swap aggregator in 2024, after years of running the feature for free, and DeBank has been upfront that the fee funds ongoing development. That is still less than a third of MetaMask's advertised 0.875 percent, which itself often compounds with routing costs once slippage is added. Over the swaps we ran during testing, Rabby's total cost stayed noticeably below MetaMask's on the same trade pairs. Neither fee applies if you route a swap directly through a DEX front end like Uniswap instead of the wallet's own aggregator, so the saving matters most to people who take the convenience of an in-wallet swap over shopping the trade manually.