Greyware Automation Products sells specialized time synchronization software used by banks, utilities, and other organizations that need highly accurate clocks. That's a niche, serious B2B market, not a typical consumer storefront. The site has been around for decades and carries no threat flags, which is consistent with a legitimate vendor that simply doesn't spend much on marketing.
What's missing is the usual paperwork. A commercial software site should have a clear privacy policy and terms of service, and this one is only partially covered. There's also no about page or social footprint to help you understand the people behind the product. For a smaller vendor serving regulated industries, that's worth checking before you commit.
If you're considering the software, start by contacting their sales or support line with a specific question. Ask about trial versions, license terms, and update policies. If you're looking for greyware.com reviews, you won't find much independent commentary, but the absence of red flags and the long domain history give reasonable confidence. The question of whether greyware.com is a scam doesn't seem supported by the evidence; the bigger issue is whether the product fits your technical needs.