OpenVPN Access Server vs ZeroTier

OpenVPN Access Server is a business VPN hosted in a customer's environment, including Linux systems, virtual appliances, containers and public clouds. Its free plan lasts indefinitely, includes all features, requires no credit card and permits up to two simultaneous connections. Growth costs $7 a month per connection and supports up to 2,000 connections; Enterprise & IoT has custom pricing and unlimited connections. A 14-day trial is available for five or more connections. Administrators have a Web UI, self-service client UI, CLI, REST API and automation templates. Authentication options include PAM, RADIUS, LDAP, SAML, local and custom methods. User- and group-level access controls are available, as are protocol and port restrictions. Identity, device and location context can be used to control application access. OpenVPN Connect supports Windows, macOS, Android, iOS and ChromeOS. Deployment options include Docker, Hyper-V, VMware ESXi, Kubernetes Helm and public cloud marketplaces. The listed security and compliance items include SOC 2 Type 2, ISO/IEC 27001:2022, HIPAA and GDPR.

ZeroTier is a software-defined networking platform for connecting people, devices and cloud environments through secure virtual networks. Its overlays can span public clouds, private data centers, on-premises environments, remote devices and edge systems. Security measures include cryptographic device identity, end-to-end traffic encryption, peer-to-peer connections when possible, and centrally defined policies enforced globally. Capabilities include cloud-to-cloud networking, global device fleets, identity-based access control, Layer 2 and Layer 3 networking, and programmable management. The platform supports hybrid deployment and lists coverage for DigitalOcean, Amazon Web Services, Google Compute Engine, Microsoft Azure, Oracle Cloud Infrastructure, Alibaba Cloud, IBM Cloud, Vultr and Equinix Metal. Documentation includes API guides and tutorials for Docker, code-server, Terraform, webhooks, and Prometheus/Grafana monitoring. The free Personal plan is limited to non-commercial use and includes 10 devices, one network and one admin. Essential costs $18 a month; Scale costs $179 a month. Platforms include Android, API, iOS, Linux, macOS, self-hosted, web and Windows.