We installed Rabby, connected it to a handful of DeFi protocols across chains, and compared its pre-transaction balance simulation against MetaMask's confirmation screen. Here is what the preview actually catches and where it still leaves a decision to you.
MetaMask's confirmation screen shows you what a transaction says it will do. Rabby shows you what it will actually do, simulated before you sign, with the resulting balance changes laid out in plain numbers. That difference sounds small until the first time a contract you were about to approve would have drained a token balance you did not expect to move, and the preview catches it before your signature makes it real.
The preview is the whole product
Every transaction routed through Rabby runs through a simulation first: token amounts in and out, new approvals being granted, and any contract interaction flagged against DeBank's database of known scams and exploits. When we connected to a handful of DeFi protocols across chains during testing, the preview consistently surfaced exactly which tokens would move and by how much, catching a mispriced approval on one contract before we confirmed it. MetaMask has added its own warnings over the years, but Rabby built the entire wallet around this one screen rather than bolting a warning onto an existing flow.
Network switching that does not interrupt you
Rabby detects which chain a dApp expects and switches automatically, instead of popping up a prompt asking you to add or change networks the way MetaMask does by default. Across more than 110 EVM chains, that adds up: a session that touches Arbitrum, then Base, then a testnet does not stop to ask permission at every hop. It is a convenience feature rather than a safety one, but it is the kind of friction removal that decides which wallet stays installed after the first week.
