Big companies like WhatsApp and Discord have managed to scale their real-time applications to handle hundreds of millions of users using Erlang and its modern counterpart, Elixir. Erlang, designed in the 1980s for telecommunications, offers amazing features like fault tolerance, scalability, and distribution capabilities that are ideal for real-time apps. Elixir builds on Erlang's strengths with more modern syntax. These technologies allow for efficient concurrency, hot code swapping, and seamless inter-node communication, making them powerful tools for small teams to achieve robust, scalable applications.
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