Comparison table of websocket server implementations.

Name	Lang	License	draft75	draft76	wss	http(1) support	long(2) polling	Concurrency model(3)	Others	Updated
golang	golang	BSD-style	yes	yes	?	yes	no	csp(golang)	Part of standard library	15th Aug 2010
em-websocket	ruby	MIT	yes	yes	yes	no	no	evented (EM)		15th Aug 2010
rev-websocket	ruby	MIT	yes	yes	no	no	no	evented (rev)		15th Aug 2010
cramp	ruby	MIT	yes	no	no	yes	yes	evented (EM)	Generic framework to support websocket & long polling seperately	15th Aug 2010
Sunshowers	ruby	Ruby/GPL2	yes	?	?	?	yes	Various	Part of "Rainbows" library	15th Aug 2010
Jetty	Java	Apache2.0 Eclipse1.0	yes	?	?	yes	yes	Thread Pool		15th Aug 2010
Cometd	Java	BSD				?	yes	Thread Pool	Supports Websocket from 2.0	15th Aug 2010
Grizzly	Java	CDDL + GPL		yes			yes	MultiThread + Evented (Glassfish)		15th Aug 2010
jWebSocket	Java	LGPL		yes						15th Aug 2010
resin	Java php	?					yes			15th Aug 2010
node-websocket-server	java script	MIT	yes	yes	yes	yes	no	evented (node.js)		15th Aug 2010
Socket.io	java script	MIT	yes	yes	yes	?	yes	evented (node.js)	Uses node-websocket-sever internally	15th Aug 2010
Kaazing	Java?	Dual?	yes	yes	yes	?	yes	?		15th Aug 2010
pywebsocket	Python	New BSD	yes	yes	yes	yes (apache)	?	single process or depends on apache	standalone or apache module	15th Aug 2010
mod_websocket	Python	New BSD		yes				evented (lighttpd)	Extension for lighttpd	15th Aug 2010
erlang_websocket	Elrang	?		yes				CSP(erlang)		15th Aug 2010
Mojolicious	Perl	Artistic 2.0	yes		yes					15th Aug 2010

 

NOTE:

1: http support = whether the libirary/framework handles both websocket/http request, so that they can be seaved from same address/port

2: long polling = either the library/framework handles both long polling/and native websocket. This also includes long polling fallback.

3: Concurrency model = some depends on language, library, or its dependent web server.

 

Disclaimer: I (Makoto Inoue) set up this page to gather information to later publish the result at an online media.