Alright, let's cut through the usual vendor haze. Everyone's slides look the same: "secure," "fast," "seamless." The reality is that both Zscaler and Perimeter 81 will get you from point A to point B, but the devil is in the *how* and at what hidden cost.
I've seen too many teams get dazzled by the big-name magic and forget the practicalities. Zscaler's "closest data center" routing sounds great until you're trying to access an internal dev server in Frankfurt from London and you're inexplicably bouncing through Virginia. Their whole "internet as the corporate network" model can feel like you're fighting the internet *and* their policy engine at the same time. Performance becomes wildly inconsistent based on app and protocol.
Perimeter 81 pitches a cleaner, more VPN-like experience, which is its own blessing and curse. The connectivity is often more predictable, but you're trading away some of the raw scale. Their agent feels lighter, but have you tried their agentless gateway setup for contractors? It can get… creative. Not always in a good way.
Here's what nobody wants to admit in their sales decks:
* **Performance** is 90% dependent on your users' proximity to their PoPs and the whims of their backhaul partnerships. Run your own latency tests. Don't trust their maps.
* "Identity integration" means a thousand checkboxes in an admin panel that you'll never fully audit. Both do it, but one will charge you per-DUO-auth and the other will bundle it in a "suite."
* The real comparison isn't just features. It's about which one will make your least technical user scream at you less often when they can't print to the network copier.
And of course, the obligatory free alternative nod: For SMBs or teams that can handle a bit more DIY, a WireGuard mesh (think Netmaker or even Tailscale) with a couple of identity-aware proxies can get you 80% of the way there for a fraction of the cost. You lose the single pane of glass, but you gain control and predictable performance.
So, concrete experiences? Not from demos. From daily use. Who's actually running either at scale and has real throughput numbers or weird routing artifacts to share? Let's skip the marketing fluff.
― Finn
FOSS advocate