Wikipedia

Comparison of WebSocket implementations

The WebSocket protocol is implemented in different web browsers, web servers, and run-time environments and libraries acting as clients or servers. The following is a table of different features of notable WebSocket implementations.

Client (library) Server (library) Version compared Protocol (spec) version support Protocol test report License Implementation: language, environment API: language, environment Self-hosted server Text message support Binary message support API message-based API frame-based API streaming input-output Flow-control framework Automatic pongs for pings Automatic heartbeat pings Manual pings-pongs Frame size limit
Google Chrome 15[1] Yes No 15.0.874.8
12 Sep 2011 		8 (10) Complex C++, WebKit JavaScript, HTML5 No Yes Yes Yes No No, No No Yes No No ≥ 16 MB
(memory-limited?)
Google Chrome 16[1] Yes No 16.0.912
13 Dec 2011 		13 (17/RFC 6455) Complex C++, WebKit JavaScript, HTML5 No Yes Yes Yes No No, No No Yes No No ≥ 16 MB
(memory-limited?)
Mozilla Firefox 7[2] Yes No 7 beta
12 Sep 2011 		8 (10) MPL, GPL, LGPL C++, Necko JavaScript, HTML5 No Yes No Yes No No, No No Yes No No < 16 MB
Mozilla Firefox 11[2] Yes No 11.0
13 Mar 2012 		13 (17/RFC 6455) MPL, GPL, LGPL C++, Necko JavaScript, HTML5 No Yes Yes Yes No No, No No Yes No No < 2 GB
(memory-limited?)
Achex WS[3] Yes Yes 2.17
17 June 2014 		RFC 6455 Commercial C++ C++, JavaScript Yes Yes Yes Yes Yes Yes Yes No No Yes 2^16
Kaazing WebSocket Gateway[4] Yes Yes 5.0 Dec 2014 RFC 6455 APL2 (Community Edition), commercial (Enterprise Edition) Java, JMS JavaScript, Flash/Flex, Silverlight, Objective-C & iOS, Java, Java & Android, .NET, Xamarin Yes Yes Yes Yes No Yes Yes Yes Yes No memory-limited, configurable
Lightstreamer[5] Yes Yes 7.4.5
4 Oct 2024 		RFC 6455 Commercial, freeware Java JavaScript, Android, Java, Swift, iOS, macOS, tvOS, watchOS, visionOS, .NET Standard, C++, Python, Flash/Flex, Silverlight, J2ME Yes Yes No Yes No No Yes Yes Yes No Data driven, configurable
MigratoryData[6] Yes Yes 6.0.5
29 Aug 2021 		RFC 6455 Commercial Java JavaScript, iOS, Android, Java, C++, .NET, PHP, Node.js, Python Yes Yes No Yes No No, No Yes Yes Yes No 263, configurable
Mongoose[7] Yes Yes 7.9
24 Jan 2023 		RFC 6455 GPL, commercial C/C++ C/C++ Yes Yes Yes Yes Yes Yes Yes Yes No Yes 263, configurable
noPoll[8] Yes Yes 0.3.2
28 aug 2015 		RFC 6455 LGPL 2.1 ANSI C ANSI C Yes Yes Yes Yes Yes Yes No Yes Yes Yes memory-limited, configurable
POCO C++ Libraries[9] Yes Yes 1.4.6
23 Sep 2014 		RFC 6455 Boost C++, POCO C++ Libraries C++ Yes Yes Yes No Yes Yes No No No Yes memory-limited, configurable
PowerWebSockets[10] Yes Yes 15.176.5188
26 Jun 2015 		RFC 6455 Test report[11] Commercial .NET .NET Framework, .NET Compact Framework, Xamarin. iOS, Xamarin.Android, Windows Phone, Silverlight, Mono Yes Yes Yes Yes No Yes Yes Yes Yes Yes memory-limited, configurable
QtWebSockets[12] Yes Yes 1.0
12 Nov 2013 		RFC 6455 LGPL C++, Qt Qt Yes Yes Yes Yes Yes No Yes Yes Yes Yes memory-limited, configurable
RingSocket[13] No Yes 1.0
13 Sep 2019 		RFC 6455 MIT C C Yes Yes Yes Yes No No Yes Yes No No unlimited/configurable
Resin[14] No Yes 4.026
29 Feb 2012 		RFC 6455 GPL, commercial Java, C Java Yes Yes Yes No Yes No Yes No No memory-limited, configurable
WebSocketListener[15] No Yes 2.1.3
24 Nov 2014 		RFC 6455 MIT .NET, Mono .NET, Mono Yes Yes Yes Yes No Yes Yes Yes Yes No Configurable
Wt[16] No Yes 3.2.0
30 Nov 2011 		0,7,8,13 (17) [? Report] GPL, commercial C++, Boost Asio C++ Yes Yes No No No Yes Yes Yes No memory-limited, configurable
XSockets.NET[17] Yes Yes 5.* RFC 6455 Commercial .NET Server-languages: Windows (.NET), Unix-Linux (Mono)

Client-languages: JavaScript, .NET, Mono

Yes Yes Yes Yes No Yes Yes Yes Yes Yes memory-limited, configurable
RIWA Gateway[18] Yes Yes 2.01 RFC 6455 Commercial Java Java, Android, iOS, JavaScript Yes Yes Yes Yes No Yes No Yes No No memory-limited, configurable
μWebSockets[19] No Yes v0.14.0
28 Mar 2017 		RFC 6455 Test report[20] Apache License 2.0 C++, epoll, Libuv, Boost Asio C++, JavaScript, Node.js Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes memory-limited, configurable
Boost.Beast[21] Yes Yes 94
30 July 2017 		RFC 6455 Test report[22] Boost C++, Boost Asio C++ Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes unlimited (packets streamed to user code), permessage-deflate also unlimited (chunked)
libwebsockets[23] Yes Yes 2.4
16 Oct 2017 		RFC 6455 + RFC 7692 Test report[24] LGPL2 + SLE C, libuv, libev [Wikidata], libevent, poll, external poll loop integration, OpenSSL, mbedTLS C, HTML5, JavaScript Yes Yes Yes Yes Yes Yes, yes Yes Yes Yes Yes unlimited (packets streamed to user code), permessage-deflate also unlimited (chunked)
websocket++[25] Yes Yes 0.8.2
20 Apr, 2020 		RFC 6455 BSD C++11 C++11 ? ? ? ? ? ? ? ? ? ? ?
facil.io[26] Yes Yes 0.7.1
18 May 2019 		RFC 6455 MIT C C Yes Yes Yes Yes Yes Yes, yes Yes Yes Yes Yes configurable client to server limits. unlimited (chunked) server to client.
oatpp-websocket[27] Yes Yes 1.3.0
19 Nov 2021 		RFC 6455 Apache License 2.0 C++11, Oat++ C++11, Oat++ Yes Yes Yes Yes Yes Yes Yes No No Yes unlimited (packets streamed to user code)

Notes

edit
  1. ^ a b Chromium website
  2. ^ a b Necko website
  3. ^ Achex WS website
  4. ^ Kaazing website
  5. ^ Lightstreamer website
  6. ^ MigratoryData website
  7. ^ Mongoose Library website
  8. ^ noPoll website
  9. ^ POCO C++ Libraries documentation
  10. ^ PowerWebSockets website
  11. ^ PowerWebSockets Autobahn|Testsuite report
  12. ^ QtWebSockets website
  13. ^ RingSocket (GitHub)
  14. ^ Caucho website
  15. ^ WebSocketListener website
  16. ^ wt website
  17. ^ XSockets.NET website
  18. ^ RIWA website
  19. ^ μWebSockets (GitHub)
  20. ^ μWebSockets Autobahn|Testsuite report
  21. ^ Boost.Beast (GitHub)
  22. ^ Beast.WebSocket Autobahn|Testsuite report
  23. ^ libwebsockets.org website
  24. ^ libwebsockets.org lws Autobahn|Testsuite report
  25. ^ websocket++ website
  26. ^ facil.io website
  27. ^ oatpp.io website
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