Windows users have been underserved by 2FA apps that are mobile-only. These five free, open-source authenticators bring desktop access, encrypted sync, and real privacy to your PC — from cloud-synced convenience to fully self-hosted control.
Most two-factor authentication apps assume you're on a phone. Google Authenticator, Aegis, and Raivo are all mobile-first — fine for quick logins on the go, but frustrating when you're working at a Windows desktop and need a code without reaching for your phone every time.
The good news: a new wave of free, open-source authenticators has closed the gap. Some offer dedicated Windows desktop apps, others run in your browser, and one is fully self-hostable. All five picks below are free (or have generous free tiers), open-source, and built with encryption at the core.
A quick note on how this works: we may earn a commission if you sign up through some of the links below. That doesn't change our rankings — every pick is here because it genuinely solves a Windows 2FA problem.
Ente Auth is the pick that most Windows users should start with. It's free, open-source, and offers a dedicated desktop app for Windows — not a browser extension workaround, an actual native application.1
The standout feature is end-to-end encrypted cloud sync. Your TOTP codes sync across your PC and phone, but the encryption keys live with you — Ente can't read your codes.1 That's the zero-knowledge architecture: the convenience of cloud sync without trusting a third party with your secrets.
If you've used Google Authenticator or Authy and wished for a desktop equivalent that didn't compromise on privacy, Ente Auth is the answer.
If you already use Bitwarden as your password manager, its built-in TOTP support means your 2FA codes live right next to your passwords in the same encrypted vault.2 One autofill, one login, done.
Bitwarden is cross-platform with E2EE sync, so your codes are available on Windows, macOS, Linux, iOS, and Android.2 The TOTP feature is part of the premium tier, which costs $10 per year — still one of the cheapest paid options in the password-manager space.
This is the pick for users who want to consolidate credentials and 2FA into a single, well-audited vault rather than juggling a separate authenticator app.
2fast is built specifically for Windows desktop. It's a free, open-source TOTP authenticator with local encrypted storage — no cloud, no account, no sync server.3
For users who are uncomfortable with any cloud dependency (even E2EE), 2fast keeps everything on your machine. You back up your encrypted vault file yourself. The trade-off is that codes don't sync to your phone — this is a desktop-only tool by design.
If your threat model calls for maximum local control and you only need 2FA codes on your Windows PC, 2fast is the most focused option here.
Proton Authenticator comes from the team behind Proton Mail and Proton VPN. It's free, open-source, and uses end-to-end encryption throughout.4
The main appeal is ecosystem integration: if you already use Proton for email or VPN, this authenticator fits naturally into that privacy-first stack. It doesn't currently offer a dedicated Windows desktop app — it's mobile-first with cross-platform sync — but the encrypted cloud backup means your codes are recoverable and accessible across devices.4
It's a strong choice for existing Proton users who want their 2FA codes under the same privacy umbrella.
2FAuth is a web-based, self-hosted authenticator you can deploy via Docker on your own Windows server, NAS, or any machine running Docker.5 Once running, you access it through any browser on your Windows desktop — or any device on your network.
It supports both TOTP and HOTP, encrypts your data, and gives you full sovereignty over where your 2FA secrets live.5 No third-party cloud, no vendor lock-in. The trade-off is setup complexity: you need to be comfortable with Docker and basic server administration.
For power users who want maximum control and already run self-hosted services, 2FAuth is the most flexible option on this list.
| Feature | Ente Auth | Bitwarden | 2fast | Proton Auth | 2FAuth |
|---|---|---|---|---|---|
| Windows access | Desktop app | Extension + app | Native Windows app | Mobile + web | Self-hosted web |
| Sync | E2EE cloud | E2EE cloud | Local only | E2EE cloud | Self-hosted |
| Cost | Free | Free / $10/yr | Free | Free | Free |
| Open source | Yes | Yes | Yes | Yes | Yes |
Ente Auth wins on standalone convenience — a real desktop app with encrypted cloud sync, no strings attached. Bitwarden wins on integration if you want passwords and 2FA in one vault. 2fast wins on local-only privacy for desktop purists. Proton Authenticator and 2FAuth serve more specific needs: the Proton ecosystem and self-hosting respectively.
All five are free or low-cost and open-source, which means the code is auditable and you're not locked into a proprietary service. For Windows users who've been making do with mobile-only authenticators, any of these is a meaningful upgrade.
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