2014

• May 28, 2014 - Introducing Socket.IO 1.0

2015

• September 21, 2015 - Socket.IO 1.3.7
• July 15, 2015 - Socket.IO 1.3.6
• July 14, 2015 - Socket.IO P2P
• April 13, 2015 - Socket.IO C++
• March 9, 2015 - Socket.IO on iOS
• March 3, 2015 - Socket.IO 1.3.5
• February 14, 2015 - Socket.IO 1.3.4
• February 4, 2015 - Socket.IO 1.3.3
• January 20, 2015 - Native Socket.IO and Android

2016

• January 27, 2016 - Socket.IO 1.4.5
• January 11, 2016 - Socket.IO 1.4.4
• January 8, 2016 - Socket.IO 1.4.1, 1.4.2 and 1.4.3
• January 6, 2016 - Socket.IO 1.4.0

2017

• June 24, 2017 - Socket.IO 2.0.1, 2.0.2 and 2.0.3
• May 15, 2017 - Socket.IO is on Open Collective
• May 13, 2017 - Socket.IO 2.0.0

2020

• November 23, 2020 - Monthly update #2
• November 12, 2020 - Redis Adapter v6.0.0
• November 5, 2020 - Socket.IO 3 Release
• October 3, 2020 - Monthly update #1
• October 2, 2020 - Socket.IO client 2.3.1
• September 10, 2020 - Engine.IO 4 Release

2021

• November 18, 2021 - Socket.IO 4.4.0
• October 15, 2021 - Socket.IO 4.3.0
• July 8, 2021 - Monthly update #5
• May 14, 2021 - Socket.IO 4.1.0
• May 6, 2021 - Monthly update #4
• April 16, 2021 - Socket.IO Admin UI
• April 7, 2021 - Monthly update #3
• March 10, 2021 - Socket.IO 4.0.0
• January 15, 2021 - Socket.IO 3.1.0
• January 5, 2021 - Socket.IO 2.4.0

2022

• September 13, 2022 - Socket.IO server for Deno
• April 23, 2022 - Socket.IO 4.5.0

2023

• August 23, 2023 - Socket.IO on Azure
• April 7, 2023 - Redis Streams adapter

2024

• July 25, 2024 - npm package provenance
• July 12, 2024 - Socket.IO monorepo
• March 29, 2024 - Three new adapters
• January 12, 2024 - Chat platform