- Access Control
- Access Management
- Application
- Authentication
- Cloud
- Cloud VPN
- Connectivity
- Cybersecurity
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Who is Perimeter 81?
Perimeter 81 is a cybersecurity and networking vendor that provides a cloud-delivered secure access platform for connecting users, devices, and resources across hybrid and multi-cloud environments.
- Cloud-based Secure Access Service Edge (SASE) and Zero Trust Network Access (ZTNA) platform for workforce connectivity
- Web-based management console for policy configuration, network segmentation, and access control
- Client applications for remote users and devices to connect to corporate resources over encrypted tunnels
- Integration with identity providers and Single Sign-On (SSO) platforms for centralized authentication and access management (identity and access management)
- Network security capabilities including Firewall-as-a-Service (FWaaS), secure web access, and traffic inspection (network security)
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More About Perimeter 81
Perimeter 81 provides a cloud-delivered secure access platform that is used by enterprises and institutions to replace or augment legacy VPNs and traditional perimeter-based security architectures. The platform is aligned with SASE and Zero Trust Network Access (ZTNA) models, in which access is granted based on user identity, device posture, and granular policies rather than on static network locations. Organizations deploy Perimeter 81 to connect remote employees, contractors, and branch sites to applications and services hosted in data centers, public clouds, and Software-as-a-Service (SaaS) environments.
The service operates as a centrally managed fabric that brokers connections between users and resources through distributed gateways. Administrators use a web-based console to define access policies, segment networks, and configure which users or groups can reach specific applications or subnets. Connectivity from endpoints is established through client agents that create encrypted tunnels to the Perimeter 81 network, typically using standard Virtual Private Network (VPN) and TLS-based protocols for secure transport. This approach enables enterprises to enforce uniform security policies across heterogeneous environments, including on-premises (on-prem) infrastructure, private clouds, and public cloud platforms.
Perimeter 81 positions its offering within categories such as SASE (secure networking and security-as-a-service), Zero-Trust Network Access (ZTNA) (remote access security), and network security-as-a-service. The platform incorporates capabilities associated with FWaaS, secure web access, and traffic inspection, allowing organizations to control and monitor user traffic without operating physical appliances in each location. Integration with identity providers and SSO systems (identity and access management) allows administrators to enforce conditional access policies, role-based permissions, and Multifactor Authentication (MFA) for access to internal and external applications.
From an architectural perspective, Perimeter 81 supports zero trust principles by limiting lateral movement through network segmentation and application-level access. Instead of placing users on a flat corporate network, the platform grants access only to authorized resources, with policies defined at the user, group, and application level. This design aligns with common enterprise security frameworks that emphasize least-privilege access, continuous verification, and encrypted communication across untrusted networks.
In an enterprise directory or marketplace, Perimeter 81 can be categorized under SASE platforms, Zero Trust Network Access solutions, cloud VPN and remote access services, and network security-as-a-service. It is relevant to stakeholders responsible for network architecture, Security Operations (SecOps), and identity and access management who are evaluating options to consolidate remote access, secure branch connectivity, and protect access to cloud and on-prem resources through a single, cloud-managed platform.
Our description of Perimeter 81. Updated December 2025.
