socket.ioObserved

Socket.IO

Socket.IO — Bidirectional and low-latency communication for every platform

Product intelligence for socket.io. Updated from 9 sources. Is this your product?

91% confidence
12 changes trackedLast updated Apr 12, 2026Ships every ~4 days

Changelog

12 changes tracked · 3 sources · Ships every ~4 days

April 2026

No updates detected in 25 days. Previous cadence: every 4 days.

March 2026
FEATURENewCurrent

Socket.IO v4.8.3 was released on March 18, 2026; Socket.IO v4.8.3 fixed issue where calling io.close() on a stopped server would

Also offered by: Centrifugo
FEATURENewCurrent

Socket.IO parser v4.2.6 was released on March 17, 2026; Socket.IO parser v4.2.6 added limit to number of binary attachments

FEATURENewBaseline

Engine.IO v6.6.6 was released on March 10, 2026; Engine.IO v6.6.6 added @types/ws as dependency

September 2024
FEATURENewBaseline

Socket.IO v4.8.0 was released on September 21, 2024; Socket.IO v4.8.0 added custom transport implementations feature; Socket.IO v4.8.0 added tryAllTransports option (+2 more)

Also offered by: Azure SignalR Service and Azure Web PubSub, SocketCluster / SocketCluster.io
June 2023
FEATURENewBaseline

Socket.IO v4.7.0 added support for WebTransport

Also offered by: Ably, Azure SignalR Service and Azure Web PubSub, Centrifugo, SocketCluster / SocketCluster.io
February 2023
FEATURENewBaseline

Socket.IO v4.6.0 introduced Connection state recovery

November 2021
FEATURENewBaseline

Socket.IO v4.4.0 added support for uWebSockets.js

Also offered by: Ably, Azure SignalR Service and Azure Web PubSub, Centrifugo, SocketCluster / SocketCluster.io
May 2021
FEATURENewBaseline

Socket.IO v4.1.0 introduced serverSideEmit() function

March 2021
FEATURENewBaseline

Socket.IO v4 was released in March 2021

November 2020
FEATURENewBaseline

Socket.IO v3 was released in November 2020

May 2017
FEATURENewBaseline

Socket.IO v2 was released in May 2017

Data Quality

11 of 14 intelligence sources gathered

Source Coverage11/14
Claim Verification (48 claims)
Verified / Cross-ref
17
Single source
31
Awaiting Data (2)
Pricing data
Supported integrations

Product Reference

Is this your product?

Data quality: 91%. 2 data gaps detected.

Unclaimed
Missing data:
Pricing data — pending extractionIntegration data — pending verification

Claiming is free. Payment never buys placement — data quality determines visibility.

See what AI gets wrong about Socket.IO