{
    "products": [
        {
            "slug": "proton-authenticator",
            "name": "Proton Authenticator",
            "kind": "app",
            "website": "https://proton.me/authenticator",
            "page": "https://listme.name/software/proton-authenticator",
            "tagline": "Open-source two-factor app with end-to-end encrypted sync",
            "summary": "Proton Authenticator is a two-factor authentication app from Proton, the company behind Proton Mail. It runs on iPhone, iPad, Apple Watch, Android, macOS, Windows and Linux, and it syncs and backs up codes with end-to-end encryption.",
            "developer": "Proton",
            "platforms": [
                "ios",
                "android",
                "macos",
                "windows",
                "linux"
            ],
            "pricing": "free",
            "price_note": "Free to use and ad-free, according to its site",
            "free_to_use": true,
            "open_source": true,
            "strengths": [
                "Free to use, with sync and backup of codes",
                "Apps for phones, tablets, Apple Watch and desktops",
                "Standalone app, with no password manager needed"
            ],
            "limits": [
                "No browser extension is listed on the product page"
            ],
            "checked": "2026-10-10",
            "connected_to_publisher": false,
            "overview": "Proton Authenticator generates one-time codes on phones, tablets, Apple Watch and desktops. The app supports biometric unlock, and you can search for codes and see the next code for an account. Codes sync and back up across devices, and the site describes the app as end-to-end encrypted.\n\nProton describes the app as open source, free to use and ad-free, and it says the company is Swiss-based. It is a standalone product, although the site also promotes Proton Pass for storing passwords alongside codes. No browser extension is listed on the product page."
        },
        {
            "slug": "yubico-authenticator",
            "name": "Yubico Authenticator",
            "kind": "app",
            "website": "https://github.com/Yubico/yubioath-flutter",
            "page": "https://listme.name/software/yubico-authenticator",
            "tagline": "Free app for managing one-time codes on a YubiKey",
            "summary": "Yubico Authenticator is an open-source companion app for YubiKey hardware keys, published by Yubico. It runs on Windows, macOS, Linux, Android and iOS and manages the one-time password accounts stored on a YubiKey.",
            "developer": "Yubico",
            "platforms": [
                "windows",
                "macos",
                "linux",
                "android",
                "ios"
            ],
            "pricing": "open-source",
            "price_note": "Free under Apache 2.0; works with a YubiKey hardware key",
            "free_to_use": true,
            "open_source": true,
            "license": "Apache-2.0",
            "source": "https://github.com/Yubico/yubioath-flutter",
            "strengths": [
                "Apache 2.0 licensed, with source on GitHub",
                "Desktop apps for Windows, macOS and Linux"
            ],
            "limits": [
                "Needs a YubiKey hardware key",
                "The iOS version is a separate app"
            ],
            "checked": "2026-10-10",
            "connected_to_publisher": false,
            "overview": "Yubico Authenticator is the companion app for YubiKey hardware keys, published by Yubico under the Apache 2.0 license. Its README describes it as a way to manage the YubiKey and access one-time passwords, with a desktop app for Windows, macOS and Linux and an Android app.\n\nThe supported systems listed in the project are Windows 10 and later, macOS 13 and later, Ubuntu 22.04 and later, and Android 13 and later. The iOS version is a separate app that the project links from its README. Because the app is built around a YubiKey, it is useful only if you own a compatible key."
        }
    ],
    "differences": [
        "Proton Authenticator: free. Yubico Authenticator: free and open source."
    ],
    "shared_rankings": [
        {
            "list": "authenticator-apps",
            "name": "Authenticator apps",
            "page": "https://listme.name/best/authenticator-apps",
            "of": 10,
            "results": [
                {
                    "product": "proton-authenticator",
                    "rank": 2,
                    "score": 89,
                    "verdict": "Open-source app with end-to-end encrypted sync and backup across phones, tablets and desktops, plus an Apple Watch app. No browser extension is listed, and the company is Swiss-based.",
                    "best_for": "Encrypted sync across phones, tablets and desktops",
                    "spec": {
                        "platforms": "iOS, Android, macOS, Windows, Linux",
                        "open_source": true,
                        "backups": "End-to-end encrypted sync and backup"
                    }
                },
                {
                    "product": "yubico-authenticator",
                    "rank": 3,
                    "score": 88,
                    "verdict": "Open-source companion app for YubiKey keys, with desktop builds for Windows, macOS and Linux and an Android app. It is useful only with a YubiKey, unlike the phone apps above, and its iOS version is a separate app.",
                    "best_for": "Hardware-key users who want desktop and mobile access",
                    "spec": {
                        "platforms": "Windows, macOS, Linux, Android, iOS",
                        "open_source": true,
                        "backups": "Codes live on the YubiKey; no cloud backup described"
                    }
                }
            ]
        }
    ],
    "ranks_higher_in_closest_shared_list": "proton-authenticator",
    "page": "https://listme.name/compare/proton-authenticator-vs-yubico-authenticator",
    "json": "https://listme.name/api/v1/compare/proton-authenticator-vs-yubico-authenticator.json",
    "notes": [
        "Scores are editorial and only comparable inside one list. Products with connected_to_publisher true receive a disclosed ranking lift: https://listme.name/methodology"
    ],
    "source": "https://listme.name",
    "license": "Free to read and cite with attribution to listme.name.",
    "docs": "https://listme.name/developers"
}