erlyaws/yaws

Yaws webserver observed · 2026-10-13

github.com/erlyaws/yaws · homepage · Erlang · BSD-3-Clause (permissive) observed · 2026-10-13

Health v2 · maintenance only

90/100

Activity 95
Release rhythm 78
Longevity 100

How is this computed?

round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-10-21. Adoption (stars, forks) is never an input.

gap_med: 0
age_days: 6451
days_rel: 144
days_push: 34
n_releases_24m: 2

Full methodology

Adoption not part of the score

1312 stars · 271 forks observed · 2026-10-13

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

Yaws is a high-performance HTTP 1.1 webserver written entirely in Erlang, particularly well suited for dynamic-content web applications. It can operate in standalone mode as a regular webserver daemon or in embedded mode inside another Erlang application, handling each client with a lightweight Erlang process.

Use cases

serve dynamic web content from an Erlang application
run a high-concurrency HTTP server on the BEAM
embed a web server inside an existing Erlang/OTP app
host websockets or server-sent events in Erlang
build Erlang web apps with appmods instead of a separate app server
self-host a lightweight webserver daemon on Linux

When to choose

your codebase is Erlang/OTP 25+ and you want the web layer in the same VM
you need very high client concurrency with one process per connection
you want an embeddable webserver for an OTP application rather than a reverse-proxied external server
you value a mature, long-maintained Erlang-native webserver with websocket and SSE support

When to avoid

you need HTTP/2 or advanced proxying features found in Nginx/Caddy
your application stack is not Erlang/Elixir-centric
you develop or deploy primarily on Windows
you rely on a large plugin/module ecosystem or commercial-grade support

Facets

application · maturity stable

http-server websocket templating web-development backend bsd self-hosted erlang otp webserver http-1-1 dynamic-content embedded-webserver server-sent-events appmods appmod bsd-3-clause rebar3 high-concurrency linux macos web-server

2 sources

readme: https://github.com/erlyaws/yaws · fetched 2026-10-13 · c5d6f732ccde
homepage: https://erlyaws.github.io · fetched 2026-08-29 · 58f95f9f7c53

Member repositories

Repository	Role	Health v2
erlyaws/yaws	main	90

For agents

markdown · JSON · MCP: product_card(name="erlyaws/yaws")

Data as of 2026-10-19T08:05:51.212177+00:00 · Report a problem