ZTNA, or Zero Trust Network Access, is a security model that assumes threats are present both inside and outside a network and requires strict verification for every user and device before granting access to internal resources. Top ZTNA solutions include Cloudflare, Palo Alto Networks, Google, Zscaler, and Genians. Genians’ Universal ZTNA integrates with Network Access Control technology for secure asset access regardless of network architecture or user location.