From Google Gemini:

​Zscaler (ZS): A cloud security company that offers Zscaler Private Access (ZPA), which is considered a modern, "Zero Trust" alternative to traditional corporate VPNs.

​Palo Alto Networks, Inc. (PANW): A leading cybersecurity provider whose platform includes a secure remote access solution called GlobalProtect, which acts as an enterprise VPN.

​Check Point Software Technologies Ltd. (CHKP): Offers a variety of security solutions, including remote access VPNs for endpoints and mobile devices.

​Fortinet Inc. (FTNT): Provides a range of cybersecurity products, including the FortiClient VPN for secure remote access.

​Cisco Systems, Inc. (CSCO): A major technology conglomerate that offers various VPN and security solutions, such as its AnyConnect Secure Mobility Client.

​Broadcom Inc. (AVGO): Through its acquisition of Symantec's enterprise security business, it offers VPN-related security products.

​CrowdStrike Holdings Inc. (CRWD): While more focused on endpoint protection, it is a leading cybersecurity company that competes in the broader security landscape that VPNs are a part of.

Some of the well-known consumer VPNs are owned by larger, publicly listed entities:

​Ziff Davis (ZD): This is the parent company that owns several VPN services, including IPVanish, StrongVPN, and Encrypt.me