MetaMask has evolved from a single-chain Ethereum wallet into a multi-blockchain platform, adding native support for Bitcoin and Solana in 2025 and expanding to Layer 2 networks and sidechains. This shift reflects a broader trend in self-custody wallets moving beyond their original blockchain focus to serve users managing assets across multiple networks.

What Networks and Assets Does MetaMask Support in 2026?

MetaMask's expansion reflects the fragmented blockchain landscape users now navigate. The wallet originally launched as an Ethereum-focused tool in July 2016, created by Dan Finlay and Aaron Davis, and is now developed by Consensys, a blockchain software company focused on Ethereum infrastructure and Web3 tools. Today, the platform supports a significantly broader ecosystem.

• Ethereum and EVM-Compatible Networks: MetaMask remains strongest on Ethereum and networks that use the Ethereum Virtual Machine (EVM), a standardized computing environment that allows different blockchains to run similar code. This includes Layer 2 networks like Polygon, Arbitrum, Optimism, Base, Linea, and BNB Chain, which process transactions faster and cheaper than Ethereum's main network.
• Solana Support: MetaMask added native Solana support on July 8, 2025, allowing users to send, receive, swap, bridge, and buy Solana-based tokens directly through the wallet without relying on wrapped versions of assets.
• Bitcoin Support: MetaMask launched native Bitcoin support on December 15, 2025, letting users manage BTC directly without converting it to wrapped bitcoin, a tokenized representation of Bitcoin on other blockchains.
• Token Standards: The wallet manages ERC-20 tokens across Ethereum and EVM-compatible networks, as well as NFTs represented by ERC-721 and ERC-1155 standards, which define how digital collectibles are created and transferred.

How Does Self-Custody Work in MetaMask?

MetaMask operates as a self-custodial hot wallet, meaning users control their own private keys and approve transactions themselves rather than entrusting assets to a third party like a centralized exchange. This model offers control but requires user responsibility for security.

When you create a MetaMask wallet, the platform generates cryptographic keys and provides a Secret Recovery Phrase, a 12-word sequence that can restore access to your wallet on any device. Your MetaMask password only unlocks the wallet on your specific device; the recovery phrase is the core credential that controls your funds. Anyone with access to your recovery phrase can drain your wallet, making its protection critical.

MetaMask functions as a hot wallet, meaning it connects to the internet for active Web3 use. This convenience comes with trade-offs. Hot wallets are more exposed to phishing attacks, malicious websites, malware, and risky signature requests than cold wallets, which remain offline. For meaningful balances or long-term storage, security experts recommend pairing MetaMask with a hardware wallet, a physical device that stores private keys offline.

What Are the Key Security Considerations for MetaMask Users?

MetaMask's integration with decentralized applications (dApps) creates both opportunity and risk. When a dApp requests connection, MetaMask opens a prompt allowing users to review the request, choose an account, and approve or reject the connection. This transparency is valuable, but users must remain vigilant.

A normal dApp connection may only request access to your wallet address. More sensitive requests ask you to sign transactions, approve token spending, or grant access to smart contracts, which are self-executing programs on blockchains. Token approvals present particular risk because a malicious dApp may request more access than necessary, potentially allowing it to drain approved tokens without additional user authorization.

MetaMask is available through a browser extension for Chrome, Firefox, Brave, and Edge, as well as a mobile app for iOS and Android, and a web-based MetaMask Portfolio dashboard. The platform's accessibility across devices makes it convenient but also increases the surface area for user error or compromise.

How to Protect Your MetaMask Wallet

• Download from Official Sources: Install MetaMask only from official app stores and the legitimate MetaMask website. Avoid links sent through ads, direct messages, or fake support accounts, which commonly distribute malicious versions designed to steal credentials.
• Verify Website Domains: Before connecting your wallet to any site, check that the domain is correct and you are on the legitimate application. Phishing sites that mimic popular dApps are a common attack vector.
• Review Signature Prompts Carefully: When MetaMask displays a transaction or approval request, read the prompt thoroughly before signing. Understand what you are approving and use custom spend limits instead of unlimited approvals when possible.
• Never Share Your Recovery Phrase: Your Secret Recovery Phrase is equivalent to your private keys. Never share it with anyone, including MetaMask support staff. Legitimate support will never ask for your recovery phrase.
• Avoid Cloud Storage for Recovery Phrases: Do not store your Secret Recovery Phrase in cloud notes, screenshots, or messaging apps, which can be compromised if your account is hacked.

MetaMask's expansion into multi-chain support reflects the reality that crypto users no longer operate within a single blockchain ecosystem. As institutional adoption grows and Layer 2 networks mature, self-custody wallets must support diverse asset types and networks. MetaMask's evolution demonstrates how wallet infrastructure is adapting to serve users managing Bitcoin, Ethereum, Solana, and dozens of Layer 2 assets simultaneously, while maintaining the self-custody model that gives users direct control over their digital assets.