Tailscale is a secure connectivity platform built on WireGuard, a modern VPN protocol, that enables identity-based networking across distributed environments. The platform creates encrypted mesh networks (referred to as "tailnets") that connect devices, servers, cloud infrastructure, and users without requiring traditional VPN infrastructure such as centralized gateways or bastion hosts. Tailscale's core approach uses identity-based access control, where connectivity is granted based on authenticated user and device identity rather than network location. This model aligns with zero trust networking principles, enforcing least-privilege access across multi-cloud environments, on-premises infrastructure, Kubernetes clusters, CI/CD pipelines, Edge devices, and IoT endpoints. Key capabilities include SSH access management, MagicDNS for private DNS resolution, NAT traversal, privileged access management (PAM), and integration with existing identity providers. The platform also offers "Aperture by Tailscale," a product targeting generative AI workflow connectivity. Tailscale targets a broad range of users including developers, IT administrators, and security teams. Use cases span business VPN replacement, secure remote access, infrastructure access without public exposure, multi-cloud connectivity, and securing AI workloads. The platform is positioned as a replacement for legacy VPN, SASE, and PAM solutions. The company serves over 20,000 businesses, including enterprises such as Microsoft, Nvidia, Instacart, Duolingo, and Procter & Gamble. Tailscale offers a free tier alongside paid enterprise plans.