MetaMask
Software cryptocurrency wallet
From Wikipedia, the free encyclopedia
MetaMask is a software cryptocurrency wallet developed by ConsenSys for interacting with the Ethereum blockchain and other EVM-compatible networks.[1][2] It enables users to manage Ethereum accounts and connect to decentralized applications (dApps) via a browser extension or mobile app.[3]
| MetaMask | |
|---|---|
| |
| Developer | ConsenSys |
| Initial release | 2016 |
| Operating system | iOS Android |
| Platform | Browser extension Mobile app |
| Type | Cryptocurrency wallet |
| License | Custom proprietary license (since 2020; originally MIT open source) |
| Website | metamask |
| Repository | |
As of early 2026, MetaMask reports over 100 million users worldwide.[4]
Overview
MetaMask allows users to store and manage private keys, send and receive Ethereum-based cryptocurrencies and tokens (including ERC-20 and ERC-721 standards), broadcast transactions, and interact with dApps. dApps connect to the wallet via JavaScript interfaces, prompting users to approve signatures or transactions.[5]
The wallet features **MetaMask Swaps**, an in-app token swap aggregator sourcing liquidity from multiple decentralized exchanges (DEXs), with a service fee of 0.875%.[6]
In 2025, MetaMask introduced the **MetaMask Rewards** program (initially mobile-only), where users earn points for activities such as swaps, bridging, and referrals. Season 1 (October 2025 – January 2026) distributed over $30 million in Linea tokens and other perks to participants.[7][8]
History
MetaMask launched in 2016 as open-source software under the MIT license.[3] It initially supported browser extensions for Chrome and Firefox. Mobile versions were in closed beta from 2019 and publicly released for iOS and Android in September 2020.[2][9]
In August 2020, the license changed to a custom proprietary one.[10]
MetaMask Swaps launched on desktop in October 2020 and on mobile in March 2021.[11]
The Rewards program launched in late 2025 with Linea integration.[12]
Criticism
MetaMask has faced criticism over privacy, including default analytics settings that share some user data (which can be disabled).[13]
Its reliance on Infura (acquired by ConsenSys in 2019) has raised concerns about centralization in Ethereum infrastructure.[14]
The wallet regularly issues warnings about phishing scams and fake airdrops impersonating MetaMask.[15]