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Erlang/OTP vs Gleam: catalog facts
Erlang/OTP	Gleam
Best for: Developers building concurrent or distributed back-end systems	Best for: Developers who want typed functional code on the Erlang VM
Free Free and open source.	Free Free and open source, supported by sponsors.
Windows, macOS, Linux, Command line	Windows, macOS, Linux, Command line
Lightweight processes and message passing built into the language OTP design principles for supervised, fault-tolerant applications All 4 strengths for Erlang/OTP Lightweight processes and message passing built into the language OTP design principles for supervised, fault-tolerant applications Interactive shell for quick experiments Mature runtime shared by other BEAM languages	Static types on the Erlang VM Compiler, build tool, formatter and package manager in one All 4 strengths for Gleam Static types on the Erlang VM Compiler, build tool, formatter and package manager in one Can target JavaScript as well as Erlang Access to the BEAM package ecosystem
Functional style and syntax take time to learn for newcomers Better suited to servers and distributed systems than desktop apps	Younger language with a smaller community than Erlang or Elixir
Downloadable app	Downloadable app
Open source	Open source
License: Apache-2.0	License: Apache-2.0
No account needed	No account needed
Offline features available	Offline features available
Official website Full listing and sources Sources for Erlang/OTP erlang.org Catalog checked September 24, 2026	Official website Full listing and sources Sources for Gleam gleam.run Catalog checked September 23, 2026

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