If you came across fe2.edge.pantheon.io and wondered whether it's safe, here's the short answer: it's a subdomain belonging to Pantheon, a well-respected web hosting and WebOps platform. The problem is that this specific URL is an edge server that has a mismatched SSL certificate—the certificate is valid for Pantheon's main domains but not for this particular hostname. That means your browser will show a security warning if you try to visit it, and the page won't load.
This isn't the kind of scam you'd be worried about with a fake storefront or a phishing site. Instead, it looks like an operational mistake in how Pantheon's CDN is configured. The parent company is legitimate, with transparent contact info, legal pages, and a strong brand presence. But for the average person, fe2.edge.pantheon.io isn't meant to be accessed directly, and you shouldn't rely on it for anything.
In short: the underlying business is real, but this subdomain has a broken technical setup. If you're looking for an 'is fe2.edge.pantheon.io a scam' answer, it's no—but it's also not a working site. Stick with the main Pantheon URL instead.