11 separate antivirus engines now report the ZeroTier One Windows msi installer from their website as containing a Trojan. This is reproducible on any platform by downloading their Windows installer and uploading it to virustotal.
I didn't see this until just now ... but "detection" in these cases is hardly 100% accurate. I'm unaware of any ZeroTier executable ever actually containing a trojan or any malicious software. They do occasionally get flagged, and it's likely because the nature of the software is somewhat niche and strange.