Every wallet is a negotiation between two competing goals. First: let the user sign things. Second: let the user understand what they are signing. The six most-used wallets in Web3 in 2026 strike very different balances on this tradeoff, and the difference matters more than the user-facing feature lists suggest.
This post compares how each of the six renders a token approval, a Permit2 signature, a generic eth_sign, and an EIP-7702 authorization. The yardstick is signature transparency — can the user, at the moment of the prompt, tell what is actually being authorized? Everything else (transaction speed, fiat on-ramps, swap UX) is in scope elsewhere.
Caveats: wallet UIs change frequently. Every screenshot you may see in this post is from the version of each wallet current as of April 2026. Version-check before applying any specific visual observation. The design patterns tend to be more stable than the specific pixel details.
1. MetaMask
MetaMask is the default wallet for most Web3 users and carries roughly 30M monthly actives. Its approval rendering has evolved substantially since 2022; as of April 2026 it shows the spender address, the token being approved, and the amount (with an "Unlimited" indicator for uint256.max approvals). For Permit2 signatures, the wallet renders the EIP-712 typed data with field names and values visible, which is an improvement on the prior "sign this hash" era.
Signature transparency score: B+. The approval prompt is legible to a reader who knows what they are reading; the field labels could be friendlier to non-technical users. EIP-7702 authorizations are rendered as a prominent warning screen with the delegate address highlighted, which is appropriate given the new attack surface.
Weak spot: the "Advanced" section — where the raw transaction data lives — is behind two taps and hidden by default. A user who suspects something is off has to dig; the default view does not expose the call data.
2. Rabby
Rabby is the security-conscious power-user wallet. Built by the Debank team, it runs a "pre-execution simulation" on every transaction and shows the user what would happen if they signed — token balance diffs, NFT transfers, contract risk score, historical spender reputation. For an approval, Rabby shows the spender, the token, the amount, AND flags if the spender is unfamiliar or has a risk signal from Rabby's catalogue.
Signature transparency score: A. Rabby's Permit2 rendering is the best in the field — typed data is decoded, the deadline is shown in human-readable format, and the wallet flags any previous interactions with the downstream spender. For EIP-7702, Rabby refuses to sign without an explicit confirmation step, and it renders what the delegate can do.
Weak spot: market share. Rabby is excellent but small. Users who migrate to Rabby after a MetaMask-era scare tend to stay; users who never migrated often don't know what they are missing. Rabby is a browser extension + mobile; no custodial / exchange integration.
3. Frame
Frame is a desktop-first, hardware-wallet-native wallet. It targets the user who holds significant value cold and wants every signature to pass through a Ledger or Trezor. Frame's UI is stark by design: on a signature request, the app shows a structured decomposition of the message — function selector, resolved function name, parameters with labels — and then the user physically confirms on the hardware device.
Signature transparency score: A. Frame is closest to "what a Solidity engineer would want to see." Function name resolution is aggressive — if the ABI is in the selector registry, Frame will show approve(address spender, uint256 value) with both parameters labelled. Permit2 is handled with a custom decoder that labels the deadline and sub-permits. EIP-7702 is treated as a capital-S Signature and gets the full decomposition treatment.
Weak spot: desktop-only, intentionally technical UI. Casual users find it intimidating. Hardware wallet required in the default flow; software-only signing is available but discouraged.
4. Safe (formerly Gnosis Safe)
Safe is the multisig wallet for DAOs, treasuries, and teams. Not a single-user wallet per se — it is a smart-contract wallet holding assets that several EOAs collectively authorize. Signature transparency is exceptional because of the workflow: a transaction is proposed in the Safe UI, then reviewed by each co-signer asynchronously, then executed once threshold is met. There is no "ninety-second decision" because the asynchronous flow allows each signer to take their time.
Signature transparency score: A+ for the use-case it serves. The proposal view shows decoded call data, simulated outcome, previous interactions with the target, and the full transaction hash. Each signer sees the same decoded view. For a DAO treasury, this is the correct wallet — the tradeoff of slower approvals for higher scrutiny is exactly the point.
Weak spot: Safe is overkill for personal daily use. The on-chain execution costs gas per signature step, which adds up. The UX is not well-suited to one-person hot-wallet operations.
5. Coinbase Wallet
Coinbase Wallet is the self-custody wallet that lives alongside Coinbase's custodial product. Heavy retail user base, iOS/Android first. Signature rendering has improved over 2024-2026 but remains less detailed than Rabby or Frame. For a classic ERC-20 approval, the wallet shows the spender, the token, and an amount-or-"unlimited" flag. Permit2 signatures are rendered as decoded typed data in recent versions; prior versions showed only the hash, which drew regulator criticism.
Signature transparency score: B. Coinbase Wallet's strength is onboarding flow (fiat on-ramp via Coinbase is seamless) and fraud warnings from their in-house catalogue. Its weakness is depth: the "what does this contract actually do" dimension is less developed than the security-focused wallets.
Weak spot: EIP-7702 authorization rendering as of April 2026 is still being built out; users on the Coinbase Wallet Pectra rollout have reported less-clear delegate-authorization prompts than on MetaMask or Rabby.
6. Phantom
Phantom started as the dominant Solana wallet and expanded to EVM chains in 2023. Its EVM surface is catching up to its Solana heritage and, as of April 2026, renders approvals with spender, token, amount, and a spender-reputation flag pulled from their own catalogue. Permit2 is supported with decoded typed data. Phantom's strength is cross-chain UX: a single wallet holding Solana, Ethereum, Base, and Polygon assets with a unified activity feed.
Signature transparency score: B+. Signature prompts are readable, reputation flags are present, and the decoded typed-data view is clean. What Phantom does not do, as well as Rabby or Frame, is simulated-outcome preview — you do not see "this transaction would cost you 1.3 ETH" before signing.
Weak spot: the cross-chain UX is where most engineering attention goes; on pure EVM signature transparency, the depth is one tier behind the security-focused EVM-first wallets.
Comparative at a glance
| Wallet | ERC-20 approval | Permit2 typed data | EIP-7702 authorization | Simulation |
|---|---|---|---|---|
| MetaMask | Spender + amount + token | Decoded | Prominent warning | Basic (mainnet only) |
| Rabby | + reputation flag | Best decoded UI | Explicit confirm step | Yes, all chains |
| Frame | Full function decomposition | Custom decoder | Full decomposition | Yes, hardware-first |
| Safe | Proposal + async review | Full decoded | Multisig consensus | Yes, via Tenderly |
| Coinbase Wallet | Spender + amount | Decoded (recent) | Less clear | Limited |
| Phantom | + reputation flag | Decoded | Being developed | No |
What this comparison is not
This is a signature-transparency comparison. It is not a verdict on which wallet is "best" — the best wallet is a function of what you actually do. A DAO treasury manager and a daily DEX trader want very different things. The frame here is: given the same malicious approval prompt, which wallet gives you the most signal to refuse?
On that specific question, the hierarchy is roughly: Rabby ≈ Frame > Safe (for use-case) > MetaMask > Phantom ≈ Coinbase Wallet. The gap between the top and bottom is smaller in 2026 than it was in 2023 — every wallet has invested in transaction decoding since the drainer-epidemic year — but the gap is not zero, and for high-value wallets, choosing the more transparent option is cheap insurance.
A word on hardware wallets
Every wallet in this list can pair with a hardware device (Ledger, Trezor, Keystone, GridPlus). When paired, the hardware device's own screen becomes the authoritative source of "what you are signing" — the wallet UI's decoding is the first line, the hardware screen is the second. Frame is the wallet most naturally designed for this; the others support it but treat it as an advanced option. For any approval that would move more than you are willing to lose, the hardware device's screen should be read independently and compared against the wallet UI's decoding. Discrepancies are the loudest signal that something is wrong.
Closing observation
Four years ago (2022) every EVM wallet was essentially a signing UX problem. The state of the art was "show the hash, let the user pray." The gap between that era and 2026 is substantial, and credit where due: MetaMask, Coinbase Wallet, and Phantom have all significantly improved their decoding. But the best-in-class (Rabby, Frame, Safe) set a higher bar — and users with non-trivial value on chain benefit meaningfully from choosing one of those three over the more general-purpose wallets.
If you use AllowanceGuard's scanner at allowanceguard.com to clean up approvals you have already granted, pairing that with a wallet that helps you avoid granting the bad approval in the first place is a much better defence than either alone.