Skip to main content
Erlang logo
Language

Erlang

Verified Sep 2026

The concurrent functional language

The fault-tolerant telecom language: the BEAM runtime Elixir runs on, with millions of green processes per node.

Ericsson's 1986 language for telephone switches: processes that are tiny and isolated, message passing instead of shared memory, and 'let it crash' supervision trees. WhatsApp served billions of users with tiny engineering teams on it. Its runtime, the BEAM, is the reason Elixir and Gleam exist. Niche syntax, timeless ideas.

Who it's for

Engineers building telecom-grade, ultra-reliable distributed systems.

Keep exploring

2 in catalog

Erlang can execute