That second-guessing is just the echo of Fortinet's admin console. I see this swap a lot. You didn't trade security for ease, you traded a Swiss Army knife for a good chef's knife. For a small team, a tool you can actually manage is more secure than one you can't.
On performance for your agents, you need to look at what they're actually doing. Fortinet's hiccups were probably from deep inspection on traffic it didn't understand. P81 will be smoother on standard web stuff, but if your agents use something oddball like a legacy RDP client or a vendor-specific support tunnel, it'll either miss it entirely or route it poorly. Run a continuous ping and traceroute from their machine to the target system during a real support session. The latency won't show up on a speed test, it'll show up in the third hop.
That Swiss Army knife vs. chef's knife comparison really resonates. I think the "tool you can actually manage" point is the most critical one for smaller teams.
You're right about testing actual workflows, not just speed. I'd add one specific caveat based on our experience: the classification issue isn't just about oddball legacy tools. Sometimes it's about common SaaS admin panels or newer collaboration apps that Perimeter 81's filter hasn't been tuned for yet. We had a case where our support team's main ticketing system's file upload function was being flagged as a data transfer protocol, which added that extra latency hop you mentioned. It took a specific trace during that exact action to see it.
What was your experience with their support on reclassifying traffic once you identified a specific app causing a latency issue? Was it a quick config change or a longer process?
That's a great real world example of the classification issue, and it's one I see a lot. Their support team is usually responsive to those reclassification tickets, but the process itself is the bottleneck. You submit the trace, they analyze it, and then they push a filter update. That can take from a few hours to a couple of days depending on their queue.
The real lesson there is that their default policy model is built for common, well defined traffic patterns. Anytime your workflow steps outside of that, you're essentially volunteering for their QA process. You're not just managing your own config, you're helping them tune their global filters. It's effective, but it requires patience. Did they prioritize your ticket once you provided the evidence?
Stay constructive
The "mapping tools before cutover" step is good in theory, but it often misses the underlying protocol behaviors those tools use. We mapped everything too, but the latency issue for our agents wasn't the app itself, it was the WebSocket connections their remote support tool established for screen sharing. Perimeter 81 classified that traffic fine, but its path selection treated it as bulk data transfer, routing it through a different gateway than the initial control channel.
This created a disjointed session where the initial login was snappy but the actual screen control was laggy. A trace route showed the split path. So the map needs to include not just the application, but the specific communication patterns it uses within a session. Otherwise, you're only seeing half the picture.
audit logs don't lie
Oof, that's brutal. The billing misalignment with acquisitions is a huge hidden cost. It's not just the extra seats, it's the lost opportunity to architect proper access.
We got burned by the reverse scenario. We migrated a team off legacy VPN but kept them on "basic tunnel" licenses for a quarter while we rebuilt their workflows. P81 still charged full price because the user count triggered the higher tier. The contract model really struggles with any organizational change.
Always optimizing.
That's a good point about the contract struggling with change. It makes me wonder, do they offer any kind of mid-term true-up or adjustment clause? Or is it strictly locked to the original user count forecast?
When we were comparing, our biggest worry was exactly that. What happens if we hire faster than planned or, like you said, do an acquisition? The sales rep talked about "flexible scaling" but it sounded like it was more about adding users, not dealing with temporary dips or mixed license types during a transition.
That workshop vs. toolkit thing is exactly why I'm looking. I'm tired of paying for the whole workshop when I only ever used three saws.
Your point about mapping alerts is smart. It's easy to get sold on a list of features you never actually check. Did you find that your short list of used controls translated directly to something Perimeter 81 could do, or did you have to change your whole alerting workflow?
That mental list is the real hidden cost, isn't it? You're totally right. It becomes a kind of tribal knowledge that only lives in your head or in a random Slack thread, which is a nightmare for handovers or scaling the team.
It also shifts the accountability. When a rule in a formal policy breaks, the platform is at fault. When your workaround breaks, it's on you for building it. That's a frustrating spot to be in.
Keep it civil, keep it real.
You didn't trade advanced security for ease of use. You traded a complex framework you couldn't fully utilize for a practical, enforceable policy set. A simpler, correctly configured rule set is nearly always more secure than a complex one with gaps due to mismanagement.
On performance, your main gotcha will be application classification. Fortinet's hiccups likely came from deep packet inspection taxing the session. Perimeter 81's may come from misclassifying a legitimate app's traffic pattern and routing it suboptimally. You need to benchmark latency during your agents' actual workflows, not just run a speed test.
BenchMark
That last line is the real kicker. Everyone runs a speed test to a generic server. Almost no one benchmarks their payroll system's latency from a residential ISP at 9:05 AM on a Monday. You'll find your real bottlenecks there.
And on the simpler rule set being more secure, sure, in theory. But "practical and enforceable" only matters if the vendor's policy engine actually reflects your business logic. If you have to build a workaround because their classification is wrong, you've just recreated a complex, fragile gap. Their simplicity is a promise, not a guarantee.
Show me the unit economics.
Good point about the workaround. That's what scares me. If I build a weird rule to force a classification, am I creating my own shadow security gap that I'll forget about in six months? It feels like trading one management problem for another.
How do you even test for that in a trial? You can't know what your unique traffic will look like until you're live.
The problem with testing is you're looking for the absence of a problem, which is impossible. You can only prove a specific workflow works under test conditions.
What you can do is log *everything* during the trial, then analyze it. Set up a mirror port or a forwarding rule to send all trial traffic to a packet capture or a SIEM. Run your core business applications and look for anomalies in the P81 logs versus what you captured. Look for mismatches in classification, not just "does it work."
You'll still miss the edge case that pops up in six months, but you'll at least have a methodology for finding it. If you can't build that audit trail in the trial, you can't trust the platform long-term.
That 80/20 rule you hit on is the key metric everyone should calculate. If your team doesn't have the cycles to manage FortiSASE's full granularity, that extra 20% of potential control is just theoretical. It's wasted spend.
But I'd push back slightly on the config time savings being pure win. That simplicity is a liability during an audit or breach investigation. FortiSASE's granular logging tells you exactly which application rule was triggered. With Perimeter 81's broader app-based rules, your forensic timeline gets fuzzier. You trade config time for investigation time later.
Did you factor that into your operational cost?
Great point about the logging granularity. That's a real trade-off. FortiGate's application control logs can show you the exact signature matched, which is gold for forensics.
Perimeter 81's app-based rules do simplify logging, but you're right, it can leave you with "allowed traffic to 'General Web'" instead of "blocked traffic to 'Cryptomining.Category'". We mitigated this by forwarding full packet metadata to our SIEM and correlating P81's user/device context with our EDR's process logs. It's extra setup, but it closes the investigation gap.
So yeah, you trade config time for integration time. The operational cost shifted from daily policy tweaking to building that initial telemetry pipeline. For us, it was a one-time cost for a permanent gain in team bandwidth.
security by default
You're feeling that trade off because it's real. FortiSASE's complexity wasn't just marketing fluff, it was a direct result of decades of bolt on features for every conceivable edge case. You didn't just trade controls, you traded a Swiss army knife for a Stanley knife.
The security difference isn't about feature checklists, it's about the quality of the intelligence behind them. Fortinet's application signatures are built from their firewall business. Perimeter 81's are likely a third party feed. That's where your gotcha lives, not in the GUI. A simpler rule blocking "SaaS" is useless if their feed mislabels your critical app.
As for performance, you'll only notice it when something breaks. The hiccups you had were probably visible. With a platform that's simpler to manage, the problems tend to be more subtle, like a latency increase in one specific region that you won't spot until a user complains. Did your contract lock in any performance SLAs beyond uptime?
Show me the unit economics.