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Technology answer

Kestrel

30,415

companies run it, 0.06% of 54,527,857 in the index. Landing 12 Sept 2026.

Hosts: 64,757 live hosts run it, of 191,809,695 hosts in the index, 0.03%. 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

30,415 at Sept 26; 28,693 twelve months earlier, +1,722, +6.0% 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
2021-016,4821,741
2021-026,4841,741
2021-036,4851,742
2021-046,4861,742
2021-056,4871,742
2021-066,4871,742
2021-076,4881,742
2021-086,4961,745
2021-096,5021,746
2021-106,5061,747
2021-116,5101,748
2021-126,5141,749
2022-016,5181,750
2022-026,5221,751
2022-036,5261,753
2022-046,5301,754
2022-056,5341,755
2022-066,5371,756
2022-076,5411,757
2022-086,5451,758
2022-096,5421,757
2022-106,5431,757
2022-116,5441,757
2022-126,5461,758
2023-016,5461,758
2023-026,5471,758
2023-036,5471,758
2023-046,8291,834
2023-057,0061,881
2023-067,1831,929
2023-077,3601,977
2023-087,5372,024
2023-097,7142,072
2023-107,8902,119
2023-118,0672,166
2023-128,2432,214
2024-018,4202,261
2024-028,5962,308
2024-038,8742,383
2024-049,1372,454
2024-059,1192,449
2024-069,2062,472
2024-079,2932,496
2024-089,3902,522
2024-099,6162,582
2024-1011,1012,981
2024-1112,7223,417
2024-1214,3173,845
2025-0116,0004,297
2025-0217,6374,736
2025-0319,2745,176
2025-0420,8395,596
2025-0522,3976,015
2025-0624,0016,446
2025-0725,5926,873
2025-0827,1957,303
2025-0928,6937,706
2025-1030,0608,073
2025-1130,1688,102
2025-1230,1408,094
2026-0130,1478,096
2026-0230,2588,126
2026-0330,4678,182
2026-0430,4958,189
2026-0530,4948,189
2026-0630,5208,196
2026-0730,4878,187
2026-0830,4668,182
2026-0930,4158,168

Both denominators, and a third

Shares of the same 30,415each row a different wholelanding 12 Sept 2026

Denominator
Companies
Share
companies in the index
54,527,857
0.06%
companies running anything in Web Servers
32,553,744
0.09%
companies running anything in Application servers
13,197,360
0.23%

Three wholes, three shares of one count: a share travels with its whole, never alone. Against the last of them, Kestrel is rank 2 of 11 technologies in Application servers.

Open as a segment

30,415 companies; add a country, a sector or a band on the segment page. Counting is free.

/companies/tech-kestrel

Open the segment

Catalogue record

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

Cross-platform web server used by ASP.NET Core applications from Microsoft.

Kestrel is the default web server for ASP.NET Core, handling HTTP requests for .NET applications. It is developed by Microsoft and distributed as open source within the .NET platform.

Kindproduct
VendorMicrosoft, microsoft.com
PathInfrastructure and Hosting > Web Servers > Application servers
Slugkestrel
Deploymentself-hosted
Pricingfree
Open sourceyes
First discovered2019-10-04
Last discovered2026-09-10
Taxonomy releasetax-2026.10