Best Free Software-Defined Perimeter (SDP) Software of 2025

Fidelis Halo, a SaaS-based cloud security platform, automates cloud computing security controls. It also provides compliance across containers, servers, and IaaS within any public, private or hybrid cloud environment. Halo's extensive automation capabilities allow for faster workflows between InfoSec (DevOps) and Halo with over 20,000 pre-configured policies and more than 150 policy templates. These templates cover standards like PCI, CIS and HIPAA. The comprehensive, bidirectional Halo API, SDK, and toolkit automate security and compliance controls in your DevOps toolchain. This allows you to identify and correct critical vulnerabilities before they go into production. Free Halo Cloud Secure edition includes full access to the Halo Cloud Secure CSPM Service for up to 10 cloud service account across any mix of AWS and Azure. Get started now to automate your cloud security journey!

InstaSafe is redefining the challenge of secure access to modern networks by leveraging Zero Trust principles with its security solutions, that ensure seamless access to cloud applications, SAP applications, on-premise data, IoT devices, and multiple other neoteric use cases. InstaSafe discards traditional VPN based conceptions of a network perimeter, instead moving the perimeter to the individual users and the devices they access. The Zero Trust approach followed by InstaSafe mandates a “never trust, always verify' approach to privileged access, without focusing on network locality.

Introducing a versatile networking solution that offers connectivity, security, and flexibility at a significantly reduced price. You can easily launch a VNS3 image through various public cloud marketplaces, including AWS, Azure, and GCP. Additionally, we provide a straightforward process for private image sharing, and we are more than happy to share a private image with your account. Furthermore, we can supply a VDI/VDK file that you can seamlessly import into your preferred environment, whether it be VMWare or a secured cloud setting. Our dedicated support team at Cohesive Networks can deliver a license within minutes, ensuring a smooth experience. Upgrading the license for your VNS3 controller is a simple task that can be accomplished through the VNS3 console or the API. An optional feature, the VNS3 Overlay Network, enhances your setup by providing end-to-end encryption, improved performance in most cloud environments, and enhanced IP address mobility across various regions and cloud providers. This overlay network is built on top of the existing networking layers, allowing it to remain functional independently from the underlying hardware and software, although it remains reliant on those native networking layers. In summary, this solution not only streamlines your networking needs but also empowers you with unparalleled flexibility and security.

CloudLAN is a secure virtual office that allows distributed teams to collaborate. CloudLAN allows users to connect all their computers through a single network. TeamVPN IP provides a roaming static IP that is not tied to an internet connection in a physical location. Additional features such as service casting and Host connect make remote work possible even for companies without an in-house technical team.

The way we work has changed. People can now work anywhere and not only from their office. Applications are now hosted in the cloud and not on-premise. The company network perimeter is now distributed across the internet. Traditional, network-centric VPNs for remote access are not only difficult to maintain and outdated, but also expose businesses to security risks. It is expensive and time-consuming to purchase, deploy, and maintain VPN infrastructure. Hackers can expose entire networks if they are unable to secure access at the application level. Twingate allows organizations to quickly implement a zero trust network that is more secure than VPNs. Twingate is a cloud-based service that allows IT teams to quickly set up a software-defined perimeter without having to change infrastructure. It also centrally manages user access to internal apps, no matter if they are in the cloud or on-prem.

Transform the network you envision into reality with a solution that is both quick to implement and easy to manage. There's no need for heavy machinery to get started. Safeguard essential assets and devices that cannot be patched by utilizing a segmented virtual air gap. This allows for secure connections between any device or network across diverse environments, including public, private, cloud, and mobile networks. Prevent unauthorized lateral movement that could jeopardize your network's integrity. Eliminate the need for internal firewalls, complex VLANs, and ACLs, all while replacing costly MPLS links with more affordable SDWAN capabilities. Streamline remote access for employees and vendors, enhance hybrid cloud connectivity, and facilitate effective multi-cloud transport. Additionally, isolate and secure vital process controls and devices, share device data safely with cloud analytics, and offer secure vendor access to sensitive industrial networks. With these measures, you can ensure robust network segmentation that enhances security and provides protection against ransomware threats while also improving overall network performance.