Tailscale is a Zero Trust connectivity platform that replaces legacy VPNs, SASE, and PAM. It gives developers, IT, and security teams secure, identity‑based access to Kubernetes, CI/CD pipelines, SaaS apps, and IoT devices across single or multi‑cloud environments. What sets Tailscale apart is its instant, cross‑platform mesh network that deploys in minutes. It uses a serverless, always‑on WireGuard core, provides a GUI‑based ACL system with SSO, and offers fixed IPs and DNS‑friendly addresses, making onboarding and scaling simple for any size of team.