opensource.microsoft.com is the official gateway to Microsoft's open source projects. Because it's a subdomain of microsoft.com and has been active for 9 years, there's no real question about whether it's legitimate. The site uses strong security measures, has privacy and terms pages, and shows no history of abuse. For someone wondering if opensource.microsoft.com is safe, the evidence points clearly to yes. If you were looking for opensource.microsoft.com reviews, you won't find much in the way of user reviews — but the ownership by Microsoft itself is the strongest trust signal. It is not a scam or fake site; it's a genuine company resource. The only minor gaps, like the lack of direct contact info on the homepage, are standard for a subdomain of a huge corporation. Use it with confidence.
In plain English
opensource.microsoft.com is the official hub for Microsoft's open source projects, and it's exactly what it claims to be. It has strong security, a long history, and clear legal policies. You can safely use this site to explore Microsoft's open source work without worry.
Where the score comes from
Strong security setup with a valid SSL certificate, enforced HTTPS, and browser protections against clickjacking. No malware or phishing flags exist, which is exactly what you'd expect from a Microsoft-run site.
This is a straightforward subdomain of microsoft.com — the owner is Microsoft, one of the largest and most well-known companies in the world. The domain itself has been active for 9 years, so there's no question about who runs it or whether it's established.
No negative marks on any blacklists, and the site has been archived in the Wayback Machine for nearly a decade. That's a long track record of legitimate operation.
An about page and links to social media are present, which is good. No direct contact info is listed on the homepage, but for a corporate subdomain — especially one belonging to Microsoft — that's not unusual; contact details are readily available through the parent company.
Privacy policy and terms of service are in place, meeting legal expectations for a commercial site. Since this subdomain doesn't process payments directly, there's no additional compliance burden beyond what Microsoft already handles.
The site is hosted on Microsoft's own network and loads quickly with modern TLS. A few minor things like DNSSEC are not enabled, but that's common for subdomains and doesn't affect everyday use.
What we checked
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