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win-acme vs lego: catalog facts
win-acme	lego
Free Free and open source under the Apache 2.0 licence.	Free Free and open source under the MIT licence.
Windows, Command line	Windows, Command line
Simple guided setup for IIS sites Automatic renewal via a scheduled task	Single Go binary that is simple to deploy Works with Let's Encrypt and other ACME authorities
Windows only Advanced scenarios need familiarity with ACME validation	Command line only Requires understanding of ACME challenges and DNS or HTTP setup
Downloadable app	Downloadable app
Open source	Open source
License: Apache-2.0	License: MIT
No account needed	No account needed
Needs internet	Needs internet
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

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