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Technology answer

Socket.io

26,190

companies run it, 0.05% of 54,527,857 in the index. Landing 12 Sept 2026.

Hosts: 90,981 live hosts run it, of 191,809,695 hosts in the index, 0.05%. A host is a website, not a company.

Companies by month

Companies, monthly, on the fixed panel of sites crawled since 2020of 54,527,857 in the indexlanding 12 Sept 2026

26,190 at Sept 26; 28,109 twelve months earlier, -1,919, -6.8% on the fixed panel; the series starts January 2021 because the panel is anchored at 31 Dec 2020

The 69 numbers in this chart
MonthCompaniesObserved on the panel
2021-0113,9963,249
2021-0213,9963,249
2021-0313,9963,249
2021-0413,9963,249
2021-0513,9963,249
2021-0613,9963,249
2021-0713,9963,249
2021-0814,0003,250
2021-0914,0023,250
2021-1014,0033,251
2021-1114,0043,251
2021-1214,0063,251
2022-0114,0073,251
2022-0214,0083,252
2022-0314,0103,252
2022-0414,0123,253
2022-0514,0133,253
2022-0614,0153,253
2022-0714,0173,254
2022-0814,0193,254
2022-0914,0173,254
2022-1014,0173,254
2022-1114,0183,254
2022-1214,0193,254
2023-0114,0203,255
2023-0214,0203,255
2023-0314,0213,255
2023-0414,5403,375
2023-0514,6463,400
2023-0614,7513,424
2023-0714,8573,449
2023-0814,9623,473
2023-0915,0683,498
2023-1015,1733,522
2023-1115,2783,547
2023-1215,3843,571
2024-0115,4893,596
2024-0215,5943,620
2024-0315,8513,680
2024-0416,0453,725
2024-0515,7223,650
2024-0615,8153,671
2024-0715,9063,692
2024-0816,0013,714
2024-0916,2873,781
2024-1017,3504,028
2024-1118,3994,271
2024-1219,3874,500
2025-0120,5294,765
2025-0221,5645,006
2025-0322,5985,246
2025-0423,5665,470
2025-0524,4755,681
2025-0625,4885,917
2025-0726,4536,141
2025-0827,4216,365
2025-0928,1096,525
2025-1028,6046,640
2025-1128,3226,574
2025-1228,0546,512
2026-0127,8536,466
2026-0227,6456,417
2026-0327,5776,402
2026-0427,4726,377
2026-0527,2486,325
2026-0627,1366,299
2026-0726,8486,232
2026-0826,5616,166
2026-0926,1906,080

Both denominators, and a third

Shares of the same 26,190each row a different wholelanding 12 Sept 2026

Denominator
Companies
Share
companies in the index
54,527,857
0.05%
companies running anything in JavaScript Libraries
40,118,208
0.07%
companies running anything in Real-time communication libraries
89,802
29.2%

Three wholes, three shares of one count: a share travels with its whole, never alone. Against the last of them, Socket.io is rank 2 of 8 technologies in Real-time communication libraries.

Open as a segment

26,190 companies; add a country, a sector or a band on the segment page. Counting is free.

/companies/tech-socket-io

Open the segment

Catalogue record

As recorded in the cataloguetaxonomy release tax-2026.10last discovered 10 Sept 2026

Socket.io is an open-source JavaScript library for real-time bidirectional communication.

Socket.io enables event-based real-time communication between browsers and servers over WebSockets with fallbacks. It is widely used by developers to build chat, notifications, and collaborative features.

Kindlibrary
VendorSocket.IO, socket.io
Slugsocket-io
Deploymentself-hosted
Pricingfree
Open sourceyes
First discovered2019-10-04
Last discovered2026-09-10
Taxonomy releasetax-2026.10