List of the Top 6 On-Prem OT Secure Remote Access Software in 2025

The Tosi Platform presents a groundbreaking solution for Cyber-Physical Systems, specifically designed to protect, connect, and oversee Operational Technology (OT) networks along with critical infrastructure. Unlike traditional IT tools that have been adapted for use in OT environments, Tosi is purposefully engineered for industrial applications, ensuring compatibility with native industrial protocols and resilience to extreme temperature fluctuations, all while simplifying setup processes. Its deployment is remarkably rapid, enabling operational readiness in under five minutes through an easy “plug-and-go” method, allowing organizations to securely and effectively link their distributed systems without requiring advanced IT expertise. The platform is fortified with a strong zero-trust security model that encompasses enterprise-grade protections, including end-to-end 256-bit AES encryption, hardware-based authentication utilizing RSA keys, the elimination of open inbound ports, and adherence to ISO/IEC 27001:2022 standards. Furthermore, Tosi enhances the user experience with TosiControl, a unified management interface that visualizes network topology for improved oversight and control, ultimately boosting both operational efficiency and security throughout the organization. This all-encompassing design not only simplifies management tasks but also significantly fortifies the security framework within industrial settings, making Tosi an essential asset for modern enterprises.

SurePassID is an advanced multi-factor authentication platform designed for deployment across a variety of environments, safeguarding both information technology and operational technology domains that include critical infrastructure, legacy systems, on-site operations, air-gapped environments, hybrid clouds, and fully cloud-based architectures. The solution supports a wide array of authentication methods, featuring passwordless and phishing-resistant options such as FIDO2/WebAuthn (with FIDO2 PINs, biometrics, or push notifications), in addition to traditional one-time passwords (OTP via OATH HOTP/TOTP), mobile push alerts, SMS, voice calls, and standard procedures. SurePassID provides seamless integration with major operating systems, enabling domain and local logins, RDP/SSH remote access, and compatibility with older or embedded Windows systems commonly utilized in OT/ICS/SCADA environments, which allows for offline two-factor authentication when required. Furthermore, it secures VPNs, network devices, appliances, legacy applications, and web applications by leveraging SAML 2.0 or OIDC identity provider functionalities, as well as ensuring access for network device protocols. This adaptability positions SurePassID as a crucial asset for organizations looking to bolster their security measures across varied operational settings while maintaining user convenience. Its comprehensive features not only enhance security but also support compliance with industry regulations, making it a valuable solution for businesses focused on safeguarding their digital assets.

Armis Centrix™ is an enterprise-grade cyber exposure management platform built to secure the full spectrum of connected assets—from traditional IT devices to OT, ICS, IoT, and life-critical medical equipment. Its asset intelligence engine continuously discovers, profiles, and monitors devices across physical, virtual, cloud, and industrial networks, eliminating the blind spots that attackers often exploit. Armis Centrix™ evaluates risk in real time with automated vulnerability detection, dynamic segmentation, and contextual risk scoring tailored to each asset’s role and behavior. The platform integrates seamlessly into existing security stacks while enhancing overall visibility, compliance, and threat response capabilities. Its modular capabilities include OT/IoT Security, Medical Device Security, VIPR Pro for end-to-end prioritization and remediation, and Early Warning threat intelligence that forecasts vulnerabilities targeted by threat actors. This enables organizations to prepare proactively rather than reactively. Armis Centrix™ supports both SaaS and on-prem deployments, making it suitable for regulated industries that demand tight operational control. Advanced automation reduces manual workload and accelerates remediation timelines, improving operational efficiency across IT and security teams. The platform’s proven impact is reflected in customer stories—from municipalities discovering 30% more devices than expected to global enterprises improving cyber resilience without disrupting operations. Backed by industry analysts, strong security certifications, and deep ecosystem integrations, Armis Centrix™ stands as a leader in safeguarding today’s highly connected digital infrastructures.

To effectively manage and identify risks associated with your assets, it is crucial to prioritize their existence over their behavior. By leveraging OSINT data sources alongside exclusive cyber research, Sepio provides timely intelligence on established vulnerabilities, thereby relieving you from the necessity of actively tracking them. You can create and execute customized policies that govern your entire ecosystem, encompassing IT, OT, and IoT assets, which enables you to efficiently address risks. The automation of policy enforcement allows for rapid and uniform responses, minimizing the need for manual actions and facilitating a quicker reaction to potential asset threats. Moreover, the seamless integration with external tools expands the range of policy implementations available. This ensures comprehensive visibility across all assets, whether they serve as peripherals or core network components, further mitigating risks from unauthorized or spoofed devices. The user-friendly nature of the system requires minimal maintenance and oversight from personnel. Ultimately, Sepio equips organizations with the tools necessary to uphold a strong security framework while ensuring that daily operations remain largely uninterrupted, thereby enhancing overall resilience against cyber threats.

MetaDefender OT Access offers a highly secure method for just-in-time remote access to Operational Technology (OT) and Cyber-Physical Systems (CPS), enabling both internal employees and external collaborators to connect securely through mutually authenticated, outbound-only TLS tunnels, which reduces the risks linked to inbound traffic exposure within OT networks. This system supports an array of industrial and IT protocols such as Ethernet/IP, MODBUS, OPC UA, S7Comm, Telnet, SSH, RDP, and HTTPS, ensuring seamless integration with both legacy and modern OT systems. Depending on the selected deployment mode, the solution can be managed through cloud services hosted on AWS or implemented on-site via a local Management Console, making it adaptable for environments that are either online or completely air-gapped. Essential components include an Admin UI, a Windows client or service-level client, and a Management Console for on-premises installations, which facilitate effective connection management and the enforcement of stringent security measures. By accommodating various operational scenarios, MetaDefender OT Access not only bolsters the security framework of OT networks but also preserves operational effectiveness, paving the way for safer and more resilient industrial environments. With its comprehensive approach to security management, organizations can confidently navigate the complexities of modern OT landscapes.

Optimize the administration of user permissions by minimizing excessive access while simultaneously empowering rights for Windows, Mac, Unix, Linux, and an array of network devices, all while ensuring that employee productivity remains intact. Our approach has been successfully implemented across over 50 million endpoints, guaranteeing a rapid deployment that provides immediate benefits. BeyondTrust offers both on-premise and cloud-based alternatives, enabling organizations to effectively eliminate administrative rights without hindering user efficiency or increasing service desk requests. Unix and Linux systems are particularly vulnerable to both external threats and internal attacks, a situation that extends to connected devices such as IoT, ICS, and SCADA systems. When attackers gain root or elevated privileges, they can operate stealthily while accessing sensitive data and systems. BeyondTrust Privilege Management for Unix & Linux is recognized as a top-tier, enterprise-grade solution aimed at supporting security and IT teams in achieving compliance and protecting vital assets. This holistic strategy not only bolsters security but also promotes a sense of accountability within organizations, reinforcing the importance of vigilance in cybersecurity. By addressing privilege management comprehensively, businesses can better safeguard their environments against evolving threats.