Technology answer

Castle

companies run it of 54,527,857 in the index, too few to publish a share. Landing 12 Sept 2026.

Hosts: 15 live hosts run it, of 191,809,695 hosts in the index. A host is a website, not a company.

Companies by month

No published series

7 companies is under the publication floor of 1,000, and the fixed panel anchored at 31 Dec 2020 carries 1 of them. A monthly line drawn off that many observations would be noise at the same weight as a line off millions, so this page states the count and its date and publishes no series.

First discovered 3 Feb 2025, last discovered 31 Aug 2026.

Catalogue record

As recorded in the cataloguetaxonomy release tax-2026.10last discovered 31 Aug 2026

Account security and bot/fraud detection service for web and mobile apps.

Castle provides API-driven bot detection, account takeover protection and user risk scoring to secure logins and transactions. It is used by product and security teams to block automated abuse and suspicious sessions. Delivered as a cloud service integrated into applications.

Kindproduct

VendorCastle, castle.io

PathSecurity and Identity > WAF and Bot Management > Bot management platforms

Slugcastle

Deploymentsaas

Pricingfreemium, subscription, quote based

Open sourceno

First discovered2025-02-03

Last discovered2026-08-31

Taxonomy releasetax-2026.10

One click under this answer

Subcategory answerBot management platformsCompanies running anything in Bot management platforms, 11,553,429 of 54,527,857 in the index, and the technologies ranked in it.Category answerWAF and Bot ManagementThe category above this one, with its subcategories and the companies in each.CatalogueAll 8,177 technologiesRanked by the companies running them, with the publication gate named and the long tail drawn.