List of the Top 4 OT Secure Remote Access Software for Windows in 2025

A reliable, swift, and secure solution for remote access enables users to connect efficiently to devices and servers, facilitating quicker problem resolution. This technology enhances productivity by allowing immediate intervention from virtually anywhere.

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.

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.