Colyseus is an open-source Node.js framework for building real-time multiplayer games, with matchmaking and state synchronization.
Alternatives to BrowserGap
BrowserGap’s main distinction is that it streams an interactive remote browser while keeping the page’s HTML, CSS, and JavaScript off the user’s device. It supports tabs, forms, file transfers, session-data clearing, and human intervention in browser automation; developers can also embed a BrowserView in another web app. Its source-available community edition is free under stated conditions, and a managed session costs $3.81, paid once. It can be self-hosted or run from…
Faye is a free, open-source publish-subscribe messaging system built on the Bayeux protocol.
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Scaledrone
Free planAndroidiOSWebAPI7.4From $19 a month - 5
Lightstreamer
Lightstreamer is an event broker for delivering real-time data to web and mobile applications, with support for proxies, firewalls, disconnections, and network congestion.
Free planAndroidiOSWebAPI7.1Free plan - 6
Wren
Wren is a free, open-source, local-first reference manager for research on Apple Silicon Macs running macOS 14 or later.
Free planOpen sourceAPIExtensionmacOS7.1Free plan - 7

Mongoose Web Server
Free planAndroidiOSWebAPI6.9Free plan - 8
SocketCluster
SocketCluster is a server environment for building real-time applications over HTTP and WebSocket.
Free planAndroidiOSWebAPI6.8Free plan - 9
AnyCable
AndroidiOSWebLinux5.3 - 10
PieSocket
AndroidiOSWebLinux5.3 - 11
Primus
AndroidWebLinuxmacOS5.3 - 12
Pusher Channels
AndroidiOSWeb5.3 - 13
Ably Pub/Sub
AndroidiOSWeb5.2 - 14
Centrifuge
AndroidiOSWeb5.2 - 15
Reconnecting WebSocket
AndroidiOSWeb5.2 - 16
Apinator
iOSWebmacOS5.0 - 17
uWebSockets
LinuxmacOSWindows4.8 - 18
@fastify/websocket
LinuxmacOSWindows4.7 - 19
Autobahn|Python
LinuxmacOSWindows4.7 - 20
Channelstream
WebLinux4.7 - 21
fastwebsockets
LinuxmacOSWindows4.7 - 22
Gorilla WebSocket
LinuxmacOSWindows4.7 - 23
libwebsockets
LinuxmacOSWindows4.7 - 24
socketify.py
LinuxmacOSWindows4.7 - 25
Sockudo
WebLinux4.7 - 26
Tungstenite
LinuxmacOSWindows4.7 - 27
websocket-client
LinuxmacOSWindows4.7 - 28
websockets
LinuxmacOSWindows4.7 - 29
Action Cable
Web4.6 - 30
ApexStream
Web4.6

