Unison

Functional, distributed. First appeared 2020; ml and functional; distributed and cloud services.

Record¶

First appeared	2020
Family	ML and functional
Paradigm emphasis	Functional, distributed
Typing	Static, strong, inferred
Memory	Tracing GC
Execution	Interpreted or compiled
Primary domain	Distributed and cloud services
Designers	Paul Chiusano, Rúnar Bjarnason, Arya Irani
Reference	https://www.unison-lang.org/docs/
Last verified	not yet checked against its source by a human

Dates are first public release or publication, not the start of internal development. Colour on the typing and memory tags encodes kind, never rank.

Influence¶

Figure 1. Unison in the influence graph: recorded ancestors on the left, languages that record it as an influence on the right. Every node links to its own record. Edges name indexed languages only, so an empty side means no indexed relative, not none at all. Source: languages.json.

Within the ML and functional¶

Algebraic data types, exhaustive pattern matching, and inference-driven typing. The source of most type-system features adopted by mainstream languages since 2010.

Language	First appeared	Typing	Memory	Execution
ML	1973	Static, strong, inferred	Tracing GC	Compiled or interpreted
Erlang	1986	Dynamic, strong	Per-process GC	Bytecode VM (BEAM)
Haskell	1990	Static, strong, inferred	Tracing GC	AOT compiled
OCaml	1996	Static, strong, inferred	Generational GC	AOT compiled or bytecode
F#	2005	Static, strong, inferred	Tracing GC (.NET)	Bytecode + JIT
Elixir	2012	Dynamic, strong	Per-process GC	Bytecode VM (BEAM)
Gleam	2019	Static, strong, inferred	Per-process GC	Compiled to Erlang or JavaScript

7 other languages in this family, ordered by first appearance. Unison itself is omitted. Source: languages.json.