With all respect, regardless of the fact that Octelium can replace the products you just mentioned, its context of interest is much larger and focused towards zero trust rather than just merely a yet another VPN/a remote access tool to access internal resources. I'd really appreciate it if you could read the docs first so that you can understand the features and architecture of Octelium and what it is meant to be. Every product claims to be "zero trust" these days, even VPNs and simple tunneling applications, however, actual zero trust architectures as defined by NIST (i.e. architectures built upon L7-aware identity-aware proxies, policy-decision-points, L7-aware and context-aware per-request access control via policy-as-code and ABAC, centralized identity and policy management, integrating context information from external tools such as SIEM, SSO and threat intelligence tools into per-request access control decisions, etc...) and there are many commercial products that are "true" ZTAs (e.g. Cloudflare Access, Teleport, Google BeyondCorp, StrongDM, Zscaler, etc...). The term is being however abused by the companies, some of which are extremely well funded, to distort reality and the fact that their products were not even built for zero trust. What these fake "zero trust" vendors are trying to achieve is something like: "either we all are zero trust, or zero trust doesn't really exist or mean anything at all and it's merely a buzzword, it's your choice".