MetaMask vs Rabby: what the free wallet charges

MetaMask is free in the sense that you do not pay to install it. It takes 0.875% on swaps routed through its interface — the highest of any major EVM wallet — and discloses that in a support article rather than at the point of trade.

Rabby does the same job, charges 0.25%, and shows you what your transaction will do before you sign it. It leads our software wallet rating, and the comparison is unusually one-sided.

The fee, in money

0.875% against 0.25% is a difference of 0.625 percentage points. On a $5,000 swap that is about $31. On $50,000 of swaps across a year — not an unusual figure for someone active on-chain — it is roughly $310, paid to a wallet, on top of the DEX fee and the gas.

It is worth noting that the DEX underneath is often cheaper than the wallet's cut: our DEX rating measured effective fees as low as 0.0506% on the cheapest venue. A wallet charging 0.875% to route into that is charging seventeen times what the exchange does.

The safety feature that actually prevents losses

Rabby simulates every transaction before you sign and shows the exact balance changes that will result. Instead of a hex blob and a confirm button, you see what leaves your wallet and what arrives.

This is the single most useful anti-drainer feature in existence, because almost every drained wallet was drained by a signature the owner gave voluntarily on a page that looked correct. A simulation that says "this will move your entire USDC balance to an address you have never interacted with" stops that, and nothing about reading URLs carefully reliably does.

The licence, which matters more than it sounds

Rabby is MIT-licensed — genuinely free, forkable and commercially usable — and its audits sit in the repository where anyone can read them. MetaMask is not open source in the same sense.

The practical consequence is that Rabby's security claims are checkable by people who do not work there, and that if the company's incentives change, the software can continue without it. Both of those are worth something for a piece of software that holds your keys.

The RPC question

MetaMask's default RPC endpoint is operated by a company under the same corporate parent, which means the default configuration routes your address, your balances and your transaction history through a related party. It is changeable, and most users never change a default.

Where MetaMask still wins

• Compatibility. It is the assumed default, and a small number of applications still handle it better than anything else.
• Familiarity, which is a real cost to abandon if you have years of habits built around it.
• Institutional and enterprise tooling built specifically around it.

None of those outweigh a fee three and a half times higher on every swap. And you do not have to choose exclusively: both are software, both import the same recovery phrase, and running Rabby for swaps while keeping MetaMask for the handful of sites that need it costs nothing.

For transparency in the other direction: Zerion charges 0.67% and publishes it plainly, which is honest about a mid-range price rather than a cheap one.

The wallet's cut can exceed the exchange's by a factor of seventeen. It is the least visible fee in crypto.

The short version

For anyone using EVM chains with any regularity, Rabby is a straight upgrade: a third of the swap fee, an MIT licence with readable audits, and transaction simulation that prevents the loss people actually suffer. Keep MetaMask installed for the rare site that requires it.