List of the Top 3 Free Network Access Control (NAC) Software in 2025

Portnox is a provider of Network Access Control (NAC) solutions, which fall under the broader category of cybersecurity, particularly focusing on network security. This technology empowers organizations to implement tailored policies governing the conditions under which endpoints, such as desktops, laptops, and smartphones, can connect to their corporate networks. NAC serves to enhance the visibility of IT security teams, allowing them to identify each device attempting to access the network, as well as to determine the specific type of device and the access method being utilized, whether through Wi-Fi, wired connections, or VPN. By leveraging NAC, organizations can bolster their overall security posture and ensure that only compliant devices gain network access. This capability is crucial in today’s digital landscape, where the threat landscape is constantly evolving.

Genians is a comprehensive cybersecurity platform that offers complete surveillance of networks for all devices that are connected. In addition, it implements dynamic access controls to maintain adherence to IT security standards, while utilizing automation to effectively manage the entire security framework of an organization, integrating with Device Platform Intelligence (NAC), Endpoint Detection and Response (EDR), and Network Access Control (NAC) to establish a robustly secure network perimeter. The Genians ZNetwork Access Control is capable of safeguarding every point of connection across diverse networking frameworks such as VPN, xDSL, and 5G, ensuring principles like least privilege access, multifactor authentication (MFA), and micro-segmentation. Furthermore, it can significantly bolster the Secure Access Service Edge (SASE) architecture of any enterprise, enhancing their overall security posture. Genians serves millions of endpoints, catering to organizations across various sectors and sizes, including major global Fortune 500 companies, governmental bodies, military institutions, as well as industries in energy, finance, and education. As such, it positions itself as a vital partner in the cybersecurity landscape, offering tailored solutions to meet the unique needs of each client.

TekRADIUS for Windows is a RADIUS Server that includes an integrated DHCP Server. It has been verified on Microsoft Windows versions ranging from Vista to Windows 11. The software adheres to standards set by RFC 2865 and RFC 2866. It also supports TCP as per RFC 6613 and offers TLS through RadSec in compliance with RFC 6614. TekRADIUS is available in three distinct editions: TekRADIUS LT, which utilizes SQLite, and TekRADIUS OD, designed to work with MySQL, MariaDB, and PostgreSQL databases through ODBC. Additionally, it operates as a Windows Service and features a user-friendly interface for efficient Windows management. This versatility makes TekRADIUS a valuable tool for network administrators seeking robust authentication solutions.