ErlangA language for fault-tolerant concurrent systems — designed for telecom switches and now messaging backends. runs many lightweight processes that talk by passing messages, and restarts failed parts automatically instead of crashing the whole system — designed for 99.999% uptime on telecom equipment. WhatsApp, RabbitMQ, and CouchDB used ErlangA language for fault-tolerant concurrent systems — designed for telecom switches and now messaging backends. for massive concurrency. ElixirA language on the Erlang VM with Ruby-like syntax — popular for Phoenix web apps and real-time systems. runs on the same runtime with a friendlier syntax.

ErlangA language for fault-tolerant concurrent systems — designed for telecom switches and now messaging backends. pioneered fault-tolerant, message-passing concurrency decades before microservicesAn architecture splitting applications into small independent services — each deployed and scaled separately. became fashionable.

Open-sourcing spread ErlangA language for fault-tolerant concurrent systems — designed for telecom switches and now messaging backends. and its runtime beyond Ericsson and enabled the ElixirA language on the Erlang VM with Ruby-like syntax — popular for Phoenix web apps and real-time systems. ecosystem.