Best Open Source Alternatives to Microsoft Authenticator

Compare the best free and open-source alternatives to Microsoft Authenticator — self-hosted and desktop replacements you fully control, ranked by GitHub stars, license and platform support.

Curated by open-source.store · Updated August 2026 · 4 alternatives

Microsoft Authenticator

Proprietary SaaS

PricingFree

Platformsios, android

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Microsoft Authenticator alternatives compared

Open-source alternatives to Microsoft Authenticator, compared by stars, license and platform
Tool		License	Platforms	Self-hosted
Ente Auth	28,080	AGPL-3.0	iosandroidWeb	No	Aug 2026	Visit
Aegis Authenticator	12,832	GPL-3.0	android	No	Jul 2026	Visit
FreeOTP	1,661	Apache-2.0	androidios	No	Jun 2026	Visit
Authenticator	0	GPL-3.0	Linux	No	—	Visit