lot of really hard stuff in one place and allow application developers to focus on business logic. • Modern C++11 code base: Fast and productive. • L3/L4 filter architecture: A byte proxy at its core. Can be used for things other than HTTP (e.g., MongoDB, redis, stunnel replacement, TCP rate limiter, etc.). • HTTP L7 filter architecture: Make it easy to plug in different functionality. • HTTP/2 first! (Including gRPC and a nifty gRPC HTTP/1.1 bridge). • Service discovery and active/passive health checking. • Advanced load balancing: Retry, timeouts, circuit breaking, rate limiting, shadowing, outlier detection, etc. • Best in class observability: stats, logging, and tracing. • Edge proxy: routing and TLS.