{
    "product": {
        "slug": "2fas-auth",
        "name": "2FAS Auth",
        "kind": "app",
        "website": "https://2fas.com/",
        "page": "https://listme.name/software/2fas-auth",
        "tagline": "Local-first authenticator with no account and optional cloud backup",
        "summary": "2FAS Auth is a local-first two-factor authenticator from Two Factor Authentication Service, Inc. It runs on iOS and Android with a browser extension, requires no account, offers cloud or manual backup, and publishes its app source on GitHub.",
        "developer": "Two Factor Authentication Service, Inc.",
        "platforms": [
            "ios",
            "android",
            "browser-extension"
        ],
        "pricing": "open-source",
        "price_note": "Open source under GPL-3.0; no account required",
        "free_to_use": true,
        "open_source": true,
        "license": "GPL-3.0",
        "source": "https://github.com/twofas",
        "strengths": [
            "No account required",
            "Cloud or manual backup options",
            "Public repositories under GPL-3.0"
        ],
        "limits": [
            "Site uses both open-source and source-available wording",
            "Native apps cover iOS and Android only"
        ],
        "checked": "2026-10-10",
        "connected_to_publisher": false,
        "overview": "2FAS Auth stores tokens on your device and does not require an account. It offers cloud or manual backup, and you control how tokens are stored. Groups, badges, icons and labels help organize codes, and an Apple Watch app is available alongside the iOS and Android apps and the browser extension.\n\nThe company describes the project as open source and source-available. Its public repositories for the iOS and Android Auth apps are under GPL-3.0, and a Cryptography White Paper documents the algorithms and design choices. Because the site uses both terms, check the license of each repository before you rely on the claim.",
        "highlights": [
            "Local-first token storage",
            "No accounts required",
            "Cloud and manual backup",
            "Apple Watch app",
            "Browser extension"
        ],
        "json": "https://listme.name/api/v1/products/2fas-auth.json"
    },
    "rankings": [
        {
            "list": "authenticator-apps",
            "name": "Authenticator apps",
            "page": "https://listme.name/best/authenticator-apps",
            "rank": 4,
            "of": 10,
            "score": 87.5,
            "verdict": "Local-first, open-source authenticator with no accounts, optional cloud or manual backup and an Apple Watch app. Its site uses both open-source and source-available wording, so check each repository's license.",
            "best_for": "Local-first codes without an account"
        }
    ],
    "alternatives": [
        {
            "slug": "ente-auth",
            "name": "Ente Auth",
            "score": 91.5,
            "page": "https://listme.name/software/ente-auth"
        },
        {
            "slug": "proton-authenticator",
            "name": "Proton Authenticator",
            "score": 89,
            "page": "https://listme.name/software/proton-authenticator"
        },
        {
            "slug": "yubico-authenticator",
            "name": "Yubico Authenticator",
            "score": 88,
            "page": "https://listme.name/software/yubico-authenticator"
        },
        {
            "slug": "aegis-authenticator",
            "name": "Aegis Authenticator",
            "score": 86,
            "page": "https://listme.name/software/aegis-authenticator"
        },
        {
            "slug": "stratum",
            "name": "Stratum",
            "score": 85,
            "page": "https://listme.name/software/stratum"
        },
        {
            "slug": "bitwarden-authenticator",
            "name": "Bitwarden Authenticator",
            "score": 84.5,
            "page": "https://listme.name/software/bitwarden-authenticator"
        },
        {
            "slug": "2fauth",
            "name": "2FAuth",
            "score": 82,
            "page": "https://listme.name/software/2fauth"
        },
        {
            "slug": "authy",
            "name": "Authy",
            "score": 80,
            "page": "https://listme.name/software/authy"
        },
        {
            "slug": "freeotp",
            "name": "FreeOTP",
            "score": 77,
            "page": "https://listme.name/software/freeotp"
        }
    ],
    "links": {
        "page": "https://listme.name/software/2fas-auth",
        "markdown": "https://listme.name/software/2fas-auth.md",
        "badge": "https://listme.name/badge/2fas-auth.svg",
        "alternatives_page": "https://listme.name/alternatives/2fas-auth",
        "alternatives_json": "https://listme.name/api/v1/alternatives/2fas-auth.json"
    },
    "source": "https://listme.name",
    "license": "Free to read and cite with attribution to listme.name.",
    "docs": "https://listme.name/developers"
}