Fastest-growing Network Security companies, Q3 2026

Tailscale is a secure connectivity platform built on WireGuard, a modern VPN protocol, that enables identity-based networking across distributed environments. The platform creates encrypted mesh networks (referred to as "tailnets") that connect devices, servers, cloud infrastructure, and users without requiring traditional VPN infrastructure such as centralized gateways or bastion hosts.

Zero Networks provides automated microsegmentation and identity-based access control solutions designed to prevent lateral movement and identity-based attacks within enterprise networks. The company's platform combines identity segmentation, network-layer multi-factor authentication, and automated microsegmentation to enforce least privilege access across users, devices, and applications.

Fortinet is a global cybersecurity leader that offers a broad portfolio of integrated and automated solutions. Their offerings span network security, cloud security, endpoint security, and security operations, all powered by their Security Fabric platform and AI-driven FortiGuard Labs. They aim to protect organizations from advanced threats through innovation and integrated architecture.

Netskope provides cloud security and Secure Access Service Edge (SASE) solutions through its Netskope One platform. The company's technology centers around its Zero Trust Engine, which decodes and analyzes thousands of cloud services, applications, and web traffic to provide granular visibility and policy controls.

NetBird is a network security platform that provides secure private networking solutions for organizations. The company develops an open source network and cybersecurity platform designed to connect and secure IT infrastructure.

The platform enables organizations to establish secure private networks for their infrastructure. NetBird leverages open source technology and modern networking advancements to deliver network security capabilities.

Red Access provides an agentless, cloud-native security platform designed to protect web sessions and data flows in hybrid and in-office work environments. The platform addresses security challenges associated with web browsing, applications, and data movement without requiring traditional proxies or heavyweight Secure Service Edge (SSE) deployments.

The company's solution protects against multiple threat vectors including phishing, malware, data leaks, GenAI-related threats, BYOD vulnerabilities, and WebView2 exploits.

ZeroTier is a software-defined networking platform that provides secure connectivity across distributed infrastructure, including devices, cloud environments, on-premises systems, and edge deployments. The platform enables organizations to connect globally dispersed infrastructure without physical hardware, proprietary appliances, or complex VPN configurations.

• No hardware requirements for deployment
• Elimination of legacy VPN complexity
• Decentralized security enforcement at endpoints
• Support for distributed and air-gapped environments
• Post-quantum cryptographic protections via ZeroTier Quantum

Bastille Networks develops and operates a wireless airspace cybersecurity platform designed to detect, locate, and monitor wireless devices and radio frequency (RF) signals within enterprise facilities.

• Real-time inventory of all wireless devices and networks within corporate spaces, with device localization to a 1-3 meter radius
• Threat detection and prioritization for unauthorized, malicious, or non-compliant wireless devices
• Identification of insider threats, shadow IT, and wireless espionage attempts
• Historical movement tracking and forensic data analysis for incident investigation
• Integration with CAASM, XDR, SOAR, MDM/UEM, and Zero Trust security platforms

Elisity provides identity-based microsegmentation solutions for enterprise networks spanning IT, IoT, and OT environments. The company's platform discovers and identifies every user, workload, and device on a network and correlates this information into its IdentityGraph system. This enables organizations to implement granular security policies based on identity rather than network topology.