Download websites that use Websocket

About Websocket

Nobody purchases WebSocket and nobody installs it either. The protocol is a transport standardized at the IETF and implemented in every current browser, reached by writing a few lines of JavaScript against an interface the browser already provides. A team arrives at it the way it arrives at a loop or a timer rather than the way it arrives at a shop platform or a CMS, so the tag means something narrower and more technical than a vendor name would.

A page that opens a persistent socket is a page doing something continuous. Live chat, order books, dashboards that tick, multiplayer state, collaborative editors, delivery tracking. The connection starts as an ordinary HTTP request, upgrades, and after that either side can speak without being asked, which is the whole reason to reach for it instead of polling on a timer. Seeing the tag on a domain is a hint that the site has an interactive application surface rather than a set of documents, and for a researcher trying to separate real applications from marketing pages that hint is worth more than the category label.

Detection is inferential here and it undercounts, which is worth stating plainly rather than burying. We see Websocket when the client code that opens the connection is visible in the page we fetch. Plenty of sockets are opened only after a login, only inside an application shell that a crawler never enters, or by a bundled library whose call is minified past recognition. A crawl also cannot tell how much traffic flows over a connection, or whether the socket carries a chat widget bolted on by a third party or the core of the product itself. As of October 2026 the tag stands on 167 sites, and the honest reading of that figure is a floor rather than a census.

The protocol has been in the field since 2011 and appears in our data as Open Source because the specification and its reference implementations are free to use, with no vendor to license from. Longevity of that kind removes a question that dates most stack signals. A site running an old proprietary widget tells you the site is old, while a site speaking WebSocket tells you very little about age. The tag is therefore best used in combination, crossed against frameworks, hosting or country, rather than read on its own.

The list serves people building or selling real time infrastructure, the hosted socket gateways, message brokers, presence services and monitoring vendors who need to find sites that already have the problem their product solves. A per domain check confirms one site. A downloadable set shows where those sites cluster and what else they run.