I have firsthand experience with Zscaler and I will say that they do have a slight leg up with respect to features and functionality geared towards end user pro

I have firsthand experience with Zscaler and I will say that they do have a slight leg up with respect to features and functionality geared towards end user protection (ZIA). However I'd say that Cloudflare is closing the gap hard and fast with their Zero Trust, Gateway / SASE. The tides turn, IMO, when you start to compare ZPA and Cloudflare Tunnel and Access. Zscaler ZPA is way behind the curve here and their deployment options are horrendously legacy in nature. Case in point every "connector" from Zscaler is a VM. People may complain about "cloudflared" but you're never going to see any of Zscaler's client/server code out on a public repo. Cloudflare has far more flexible options to cover more aspects if you're charter is Zero Trust in workloads. I view Zscaler as a slight pivot with respect to how Palo Alto Networks and Checkpoint operated in the firewall market forever. It's the same old take dumped in the cloud. And at the end of the day Zscaler's pedigree is definitely user focused but now they're trying to shoehorn in workloads and a lot of the product is just not designed to offer a solution for workloads like Cloudflare is. Some of their acquisitions in the last few years were not good or scalable products, either. The last point I'll mention is that Zscaler offers no public connectivity solutions. So, unlike Cloudflare who's fully ready to take on large scale traffic for your Internet facing applications Zscaler has nothing to support you there. They talk a lot about how many POPs they have globally and the connectivity in those POPs. They also like to claim they handle more requests per day than Google. It doesn't matter though because Zscaler doesn't have the pedigree to operate as a CDN nor would I trust them to given what I've seen of their other product lines. If I'm betting with my own $$$ Cloudflare will eat Zscaler's lunch over the next few years.