⚡ Functional Programming Languages

Functional programming languages are programming languages that emphasize immutable data, declarative programming, and operations expressed through functions instead of changing program state.

They typically support higher-order functions, pattern matching, recursion, strong static typing, lazy evaluation, and concurrency features for managing complex computations.

Statistics based on 3.6M+ analyzed websites. About this data

⭐ Most Popular in 2026

The following chart shows the leading functional programming languages on the web in 2026, based on market share.

The most popular is Erlang with a share of 0.03%, followed by Elixir with 0.02% and Haskell with 0.002%.

Erlang 0.03%
Elixir 0.02%
Haskell 0.002%

✨ Best Functional Programming Languages

Below is a more detailed list of 3 functional programming languages we track, ranked by their market share.

Available filters: Compiled Functional Interpreted JIT

Rank	Name	Market share
1	Erlang Stockholm, Sweden A high-level functional programming language designed for building concurrent, distributed, and fault-tolerant systems.	0.03%
2	Elixir A dynamic, functional programming language that compiles to bytecode for the Erlang virtual machine and is designed for building scalable, fault-tolerant applications.	0.02%
3	Haskell New York, United States A statically typed, purely functional programming language with lazy evaluation, designed for building reliable and mathematically consistent software systems.	0.002%

🗃️ About This Data

We evaluate the popularity of technologies based on the number of websites where we detect their usage.
Technologies without a detectable web footprint, and those we do not track, are not reflected in the calculated market share.
This report is based on the analysis of 3,604,716 websites.
We currently track the presence of 23 programming languages across the web.
Statistics were last calculated on August 4, 2026.
For more details, see our methodology and disclaimer.