Wallet Guard

• Name: Wallet Guard
• URL: https://www.walletguard.app/
• Category: browser-extension wallet safety / transaction-preview companion tooling
• Tags: ethereum-ecosystem
• Summary: Wallet Guard is browser-edge safety software for self-custody users. The useful part is simple: site labeling, transaction previewing, and warning policy beside the wallet. Useful, but keep it in proportion. This is companion middleware, not a bigger partner-side policy stack.
• What it does:
  • Runs a browser extension that flags phishing and suspicious sites targeting wallet users
  • Simulates transactions and shows a plainer read of likely asset movement before approval
  • Offers a MetaMask Snap that adds transaction insights and approval-reminder features inside the MetaMask flow
  • Maintains an optional wallet-security scan / dashboard surface for checking exposure and approvals
  • Publishes open-source extension and Snap code, which makes the product more inspectable than many closed companion tools
• Key claims:
  • Homepage says Wallet Guard is not a wallet and instead helps secure the user’s wallet of choice from current web3 threats
  • Official FAQ copy says the extension does not connect directly to the user’s wallet or gain the ability to move assets, and that it simulates transactions without direct wallet interaction
  • Official site says transaction simulation currently supports Ethereum, Polygon, Arbitrum, and Optimism while phishing detection is blockchain agnostic
  • The extension repo describes multi-layered security via phishing protection and transaction analysis, including machine-learning checks for recently created domains, homoglyph attacks, and impersonation attempts
  • The Snap repo says the MetaMask Snap provides transaction insights and approval-revoking reminders and notes the package was audited by Consensys Diligence
• Whitepaper: No classic whitepaper or litepaper was found in this pass. The strongest primary materials were Wallet Guard’s official site plus its public GitHub organization, browser-extension repo, and MetaMask Snap repo; see ../whitepapers/wallet-guard-primary-sources-2026-04-25.md.
• Sources:
  • https://www.walletguard.app/
  • https://www.walletguard.app/snap
  • https://github.com/wallet-guard
  • https://github.com/wallet-guard/wallet-guard-extension
  • https://github.com/wallet-guard/wallet-guard-snap

Internal linkages

• Best upward comparisons: blockaid and blowfish.

Control surface

• The practical authority is still real even if the product is just an extension: site labeling, simulation quality, warning thresholds, and override behavior all shape what users sign.

• But the scope is narrower than the bigger vendor APIs. Wallet Guard mainly lives at the user edge beside the wallet, not as a broad partner-side policy layer.

• Treat it as companion warning middleware, not as the wallet, the account system, or the execution rail.

• Last reviewed: 2026-05-25 UTC