Nix Companies

A curated list of companies using Nix / NixOS in production. It is divided into two sections:

Users: companies that only use Nix
Consultants: companies that are actively extending it and/or providing consulting services for it

Similar lists for other purely functional languages:

Users

Name (Link to Website)	HQ Location	Other Languages
Aeza	UK	TypeScript, Python, Rust
Anduril	USA, California	Haskell, Rust
Antithesis	USA, Virginia	C/C++, Rust, TypeScript, JavaScript
Arista	USA	Haskell
Artificial	UK	Haskell
CircuitHub	UK	Haskell, Elm
CmdScale	Germany	Go, Rust, TypeScript, Python, C++, C#
Cyberus Technology	Germany	C++, Rust, Haskell
D. E. Shaw	USA
Dfinity	Switzerland, Zürich	Haskell, Rust
Edgeless Systems	Germany	Go
Feram	Germany	Haskell, Elm, PureScript, Rust
Flox	USA	Rust, JavaScript
Flyingcircus	Germany	Python
FPComplete	USA	Haskell, Rust
Glimpse	USA, Boston
Google	USA, California	Haskell, Rust
HAMBS	Australia	Elm
Heilmann Software	Germany	Haskell
Helsinki Systems	Germany	Rust, Python, Go
Hercules CI	Netherlands	Haskell
IO Global	USA, Wyoming	Haskell, Rust
JusPay	India, Bengaluru	Haskell, PureScript, Rust
Matroid	USA, California	Python, TypeScript, JavaScript
Mercury	USA, California	Haskell
Mlabs	UK	Haskell, Rust
Monzo	UK, USA	Python, Java
Obsidian Systems	USA, New York	Haskell
PDT Partners	USA, UK
Platonic Systems	USA	Haskell, Elm, PureScript
Plumelo	Romania	Rust, TypeScript, JavaScript
Replit	USA, California
Ryax	France	Python
Scarf	USA	Haskell
Serokell	USA	Haskell, Rust
Shopify	Canada	Ruby, Go, TypeScript
Smallbrooks	Denmark, Copenhagen	Elm
Stack Builders	USA	Haskell, Ruby
Supabase	USA	Rust, TypeScript, Go
TextQL	USA	Haskell
Typeable	USA	Haskell
Well-Typed	USA	Haskell