List of the Top 6 Free Software-Defined Perimeter (SDP) Software in 2025

Fidelis Halo is a cloud security platform that leverages SaaS to streamline the automation of security controls in cloud computing. It ensures compliance across various environments such as containers, servers, and IaaS, whether in public, private, or hybrid clouds. With its robust automation features, Halo facilitates quicker workflows between InfoSec (DevOps) teams and the platform itself, offering more than 20,000 pre-set policies and over 150 templates tailored to standards including PCI, CIS, and HIPAA. Furthermore, the comprehensive Halo API, SDK, and toolkit enhance the automation of security and compliance processes within your DevOps workflow, enabling the identification and remediation of critical vulnerabilities prior to production deployment. Additionally, the free edition of Halo Cloud Secure grants complete access to the Halo Cloud Secure CSPM Service for up to 10 cloud service accounts across a combination of AWS and Azure. Start your journey towards automated cloud security today and experience the peace of mind that comes with comprehensive protection!

InstaSafe is transforming the landscape of secure access to contemporary networks through the implementation of Zero Trust principles in its security solutions, which facilitate smooth access to various platforms including cloud applications, SAP applications, on-site data, IoT devices, and numerous innovative use cases. By shifting away from conventional VPN-based ideas of a network perimeter, InstaSafe redefines security by placing the perimeter around individual users and the devices they utilize. This Zero Trust methodology adopted by InstaSafe upholds a "never trust, always verify" stance on privileged access, emphasizing verification independent of network location. Consequently, this approach not only enhances security but also adapts to the evolving needs of modern digital environments.

Presenting a comprehensive networking solution that combines connectivity, security, and adaptability at a significantly lower cost. You can effortlessly deploy a VNS3 image through numerous public cloud platforms such as AWS, Azure, and GCP. Moreover, we offer an uncomplicated method for sharing private images, and we are readily available to share a private image with your account upon request. In addition, we can provide a VDI/VDK file that you can easily integrate into your chosen environment, be it VMWare or a secured cloud infrastructure. Our committed support team at Cohesive Networks can deliver a license within minutes, guaranteeing a hassle-free experience. Upgrading your VNS3 controller license is an easy process that can be executed through the VNS3 console or via the API. An optional enhancement, the VNS3 Overlay Network, further optimizes your setup by delivering end-to-end encryption, superior performance in most cloud environments, and enhanced IP address mobility across different regions and cloud providers. This overlay network operates atop the existing networking layers, ensuring functionality independent of the underlying hardware and software, while still depending on those native networking layers. To conclude, this innovative solution not only simplifies your networking requirements but also provides you with unmatched flexibility and robust security, making it an ideal choice for modern enterprises.

CloudLAN serves as a safe virtual workspace, enabling teams spread out across various locations to work together effectively. This platform facilitates seamless connectivity by linking all users' computers into one cohesive network. With TeamVPN IP, users benefit from a roaming static IP that remains independent of any specific physical internet connection. Furthermore, features like service casting and Host connect empower businesses to operate remotely, even if they lack an internal technical support team. This ensures that companies can maintain productivity and collaboration, regardless of their technological expertise.

The landscape of work has undergone a significant transformation, enabling individuals to operate from virtually anywhere rather than being confined to their offices. Cloud-based applications have replaced on-premise solutions, leading to a distributed company network perimeter that spans the internet. Traditional VPNs, which focus on network-centric remote access, have become not only cumbersome and outdated but also pose considerable security vulnerabilities for businesses. The costs and resources associated with acquiring, deploying, and maintaining VPN infrastructure can be staggering. When access isn't secured at the application level, hackers may be able to compromise entire networks. Twingate offers a solution for organizations by facilitating the swift implementation of a zero trust network that outperforms VPNs in security. As a cloud-based service, Twingate enables IT teams to establish a software-defined perimeter rapidly without necessitating any changes to existing infrastructure. Moreover, it provides centralized management of user access to internal applications, regardless of whether these applications are hosted in the cloud or on-premise. This modern approach not only enhances security but also simplifies access management across diverse environments.

Bring your envisioned network to life with a solution that is not only quick to deploy but also simple to oversee. You won’t require extensive machinery to get underway. Protect crucial assets and devices that are unable to be patched by implementing a segmented virtual air gap. This approach enables secure interaction between any device or network across various environments, such as public, private, cloud, and mobile networks. Protect against unauthorized lateral movement that could threaten your network's stability. Remove the necessity for internal firewalls, intricate VLANs, and ACLs, while substituting expensive MPLS connections with cost-effective SD-WAN solutions. Simplify remote access for both employees and vendors, improve hybrid cloud connectivity, and enable efficient multi-cloud transport. Moreover, isolate and secure essential process controls and devices, safely share device data with cloud analytics, and provide secure vendor access to sensitive industrial networks. By adopting these strategies, you can achieve strong network segmentation that bolsters security, mitigates ransomware risks, and simultaneously enhances overall network efficiency, ensuring a resilient operational environment for your organization. This holistic approach not only fortifies your systems but also positions your network for future growth and adaptability.