Originally created at Lyft, Envoy is a high-performance open source edge, middle, and service proxy. The project helps ease the transition to, and operation of, cloud native architectures by managing the interactions among microservices in order to ensure application performance. Envoy’s out-of-process architecture can be used with any application, in any language or runtime; supported protocols and features include HTTP/2, gRPC, MongoDB, Redis, Thrift, external authorization, global rate limiting, a rich configuration API, and much more.
Source: cncf.io