Compare Access Gate and Forescout.
Forescout controls who gets on the network. Access Gate controls who talks to what, when and how, with Zero Trust enforcement on each session and OT protocol awareness.
OT needs control after admission.
Network access control decides at the door: a device is either allowed on or kept off. But OT environments need continuous enforcement after admission. A contractor laptop that passed NAC checks should not have unrestricted access to safety-critical PLCs. That's where per-session access control comes in.
Zero Trust on every session.
Access Gate enforces access policies on every session, not just at admission. It inspects OT protocols, applies per-user and per-device policies, and segments traffic using overlay networking. All enforcement happens on-premise without agents or cloud connectivity.
Device profiling and admission control.
Forescout excels at discovering, classifying, and profiling devices across IT and OT networks. Its NAC capabilities control which devices are admitted to the network and can assign VLAN policies at the switch level. It handles large-scale device visibility and admission enforcement well.
| Feature | Access Gate | Forescout |
|---|---|---|
| Deploys without re-cabling or re-addressing | Assets keep their IP, gateway and VLAN; inserted with a routing or DNS change | Switch integration, 802.1X or VLAN steering to enforce |
| Device profiling | Network-level discovery | Deep device fingerprinting |
| Network admission control | Policy-based access | Core NAC capability |
| Per-session access control | Admission-time only | |
| OT protocol awareness | Limited OT depth | |
| Network segmentation | Via VLAN assignment | |
| MFA for legacy OT devices | ||
| Agent-free deployment | ||
| Asset inventory | ||
| Secure remote access | Not included | |
| On-premise only deployment | Cloud management option | |
| No production downtime to deploy | Connects to your existing network, staged and reversible | Admission policy can lock out live assets during rollout |
Access Gate checks every session.
Forescout decides at the point of admission: a device is either on the network or not. Access Gate enforces policies per session, controlling who talks to what, when and over which protocols. In OT, threats often come from devices already on the network. Continuous enforcement catches that.
Access Gate inspects OT protocols.
Access Gate understands OT-specific protocols like Modbus, S7, and EtherNet/IP at the session level. Forescout can identify OT devices but has limited ability to inspect or enforce policies based on OT protocol content.
Access Gate needs no cloud.
Access Gate runs entirely on-premise with no cloud dependency. Forescout offers cloud-managed options, which may not meet the requirements of air-gapped or sovereignty-sensitive OT environments.
Questions about Access Gate and Forescout.
Enforcement continues after admission.
Choose Access Gate when you need Zero Trust enforcement on each session in OT. If your priority is what happens after devices join the network, Access Gate gives deeper enforcement with OT protocol awareness.
Forescout is a strong choice for large-scale IT/OT device profiling and network admission control. If your primary goal is identifying and classifying every device on your network and enforcing admission policies across a mixed IT/OT estate, Forescout has mature capabilities in this area.
Forescout segments mainly through VLAN assignment and 802.1X enforcement at the switch. Access Gate uses overlay networking to segment without touching the underlying network. No recabling, no VLAN redesign and no switch upgrades.
Access Gate is not a traditional NAC and does not replace Forescout for IT device profiling and admission control. However, for OT environments where per-session enforcement and protocol-aware access control matter more than admission-time decisions, Access Gate can serve as the primary security enforcement point.
Also looking at cloud security tools?
If SASE and cloud-delivered Zero Trust are also on your shortlist, our Zscaler competitors and alternatives for OT comparison sets Zscaler, Palo Alto Prisma Access, Netskope and Cloudflare side by side against the constraint that decides it on a plant floor: PLCs and HMIs that will never run an agent.
Not sure which systems to protect first? Start with how to perform a risk assessment on your OT environment, which covers asset discovery and consequence rating without active scans.