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WebSocket King vs Firecamp: catalog facts
WebSocket King	Firecamp
Free Free to use in the browser.	Free Free to use as a guest; an account unlocks saved collections and team features.
Web	Web
Nothing to install Focused on WebSocket testing and debugging	Handles REST, GraphQL, WebSocket and Socket.IO in one tool Guest mode lets you send requests without signing up
WebSockets only, not a general HTTP client Little public documentation about its features	Saving requests and collections requires an account Team collaboration depends on the hosted service
Web application	Web application
Closed source	Open source
License not stated	License not stated
Not stated if an account is needed	No account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 24, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.