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Side-by-side comparison

Pick up to four tools and compare adoption, momentum and maintenance at a glance. The crown marks the leader in each row.

Language-agnostic real-time messaging server (WebSocket, SSE, HTTP streaming) that scales via Redis or NATS.

Bidirectional real-time events over WebSocket with fallbacks, rooms and auto-reconnect.

Fast, thoroughly tested WebSocket client and server for Node.js.

C++-backed WebSocket and HTTP server for Node.js tuned for very high connection counts.

Head to head

Metric	Centrifugo	Socket.IO	ws	uWebSockets.js
Stars	10.9k	63.2k	22.8k	9.2k
Weekly downloads	n/a	21.2M	400M	n/a
Download growth	n/a	+27%	+28%	n/a
Popularity score	74/100	89/100	91/100	72/100
Forks	753	10.2k	2.7k	626
Open issues	27	189	10	22
Last commit	1w ago	6d ago	3d ago	3w ago
Latest version	n/a	4.8.4	8.22.2	n/a
License	Apache-2.0	MIT	MIT	Apache-2.0
First released	2015	2010	2011	2018
Signals	None	Popular	Popular	None
Listed in	Backend › Real-time & WebSockets	Frontend › Real-time, Sync & Collaboration Backend › Real-time & WebSockets	Backend › Real-time & WebSockets	Backend › Real-time & WebSockets

Hover for exact values; switch to log scale for tools of very different sizes. Not shown (no comparable download data): Centrifugo, uWebSockets.js.

Language-agnostic real-time messaging server (WebSocket, SSE, HTTP streaming) that scales via Redis or NATS.

Bidirectional real-time events over WebSocket with fallbacks, rooms and auto-reconnect.

Fast, thoroughly tested WebSocket client and server for Node.js.

C++-backed WebSocket and HTTP server for Node.js tuned for very high connection counts.

Metric	Centrifugo	Socket.IO	ws	uWebSockets.js
Stars	10.9k	63.2k	22.8k	9.2k
Weekly downloads	n/a	21.2M	400M	n/a
Download growth	n/a	+27%	+28%	n/a
Popularity score	74/100	89/100	91/100	72/100
Forks	753	10.2k	2.7k	626
Open issues	27	189	10	22
Last commit	1w ago	6d ago	3d ago	3w ago
Latest version	n/a	4.8.4	8.22.2	n/a
License	Apache-2.0	MIT	MIT	Apache-2.0
First released	2015	2010	2011	2018
Signals	None	Popular	Popular	None
Listed in	Backend › Real-time & WebSockets	Frontend › Real-time, Sync & Collaboration Backend › Real-time & WebSockets	Backend › Real-time & WebSockets	Backend › Real-time & WebSockets

Hover for exact values; switch to log scale for tools of very different sizes. Not shown (no comparable download data): Centrifugo, uWebSockets.js.