Envoy Proxy is described as 'Envoy is an open source edge and service proxy, designed for cloud-native applications, backends, and APIs' and is an app in the Network & Admin category. There are four alternatives to Envoy Proxy for Linux, Windows and BSD. The best alternative is Træfik, which is both free and Open Source. Other great apps like Envoy Proxy are Haproxy (Free, Open Source), gobetween (Free, Open Source) and goproxy (Free, Open Source).
Træfik is a modern HTTP reverse proxy and load balancer made to deploy microservices with ease. It supports several backends (Docker, Swarm, Mesos/Marathon, Consul, Etcd, Zookeeper, etc.) to manage its configuration automatically and dynamically.
Proxy is a high performance HTTP(S), websocket, TCP, UDP, Secure DNS, Socks5 proxy server, TLS. Chain-style proxies, NAT forwarding in different LAN, TCP/UDP port forwarding, SSH forwarding ,ipv4 and ipv6 supporting.