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win-acme vs KeyManager: catalog facts
win-acme	KeyManager
Free Free and open source under the Apache 2.0 licence.	Free Free download for Windows, macOS and Linux.
Windows, Command line	Windows, macOS, Linux
Simple guided setup for IIS sites Automatic renewal via a scheduled task	Generates keys and CSRs and merges issued certificates AES-256 encrypted private key storage
Windows only Advanced scenarios need familiarity with ACME validation	Website and documentation are in Chinese Proprietary software tied to a certificate vendor
Downloadable app	Downloadable app
Open source	Closed source
License: Apache-2.0	License not stated
No account needed	Not stated if an account is needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.