OpenVPN Access Server

ZeroTier

ZeroTier is a software-defined networking platform that lets you connect servers, laptops, containers, and IoT devices into a single virtual LAN, regardless of where they physically sit. Instead of configuring traditional site-to-site VPNs or juggling firewall rules, admins create a virtual network in the ZeroTier console, and any authorized device joins it with a lightweight client. It is built on an open-core model, with a free Personal tier for small setups (10 devices, 1 network) and paid tiers that add more devices, networks, and centralized admin controls for teams and enterprises. ZeroTier is widely used for connecting remote infrastructure, home labs, IoT fleets, and distributed teams that need private, low-latency device-to-device connectivity.

Twingate

Twingate replaces legacy corporate VPNs with a zero-trust network access (ZTNA) model. Instead of putting users on the network, it creates identity-aware, encrypted, peer-to-peer connections directly from a device to the specific resource it needs, whether that is an internal app, a database, a Kubernetes cluster, or an on-prem server, without exposing the rest of the network. Admins deploy Twingate in minutes with no changes to existing infrastructure or DNS, then manage least-privilege access policies from a central dashboard with support for device posture checks, SSO providers like Okta and Entra ID, and infrastructure-as-code via Terraform. It is aimed at distributed engineering and IT teams that want VPN-level access control without VPN-level latency or attack surface.

pfSense

pfSense is an open-source firewall and router platform built on a hardened FreeBSD base, offering enterprise-grade capabilities like Snort-based intrusion detection and prevention, traffic shaping, native IPv6, and site-to-cloud VPN connectivity. It is free to run as Community Edition software on your own hardware or as a virtual machine. For organizations that want a managed path, developer Netgate sells physical hardware appliances, virtual appliances on AWS and Azure starting around $0.08/hour, and commercial support and training. pfSense is used from small offices to large enterprises for firewalling, routing, and VPN connectivity between sites and clouds.

GoodAccess

GoodAccess is a cloud VPN and Zero Trust Network Access platform built for small and mid-sized businesses that need secure remote access without deploying specialized hardware or hiring dedicated security staff. It centralizes user, device, and policy management in a single web dashboard and layers on features like multi-factor authentication, device posture checks, DNS filtering, and IP whitelisting on top of a standard business VPN. The platform is aimed at companies that need to meet compliance requirements such as ISO 27001, SOC 2, HIPAA, or GDPR while supporting hybrid and remote workforces. It supports apps for Windows, Mac, Linux, iOS, Android, and Chrome OS, and integrates with identity providers like Azure AD, Okta, and Google Workspace, positioning itself as a faster-to-deploy alternative to traditional enterprise VPN appliances.