Castle
Castle is a cybersecurity company specializing in Fraud & Payment Security, founded in 2015 and headquartered in San Francisco, United States. It has raised $11.56M in equity across 5 priced rounds, employs about 54 people, and is privately held.
updated Oct 11, 2026
Latest Castle news and company activity
What Castle did, dated — selected moves from the record, one per kind, newest first.
- Apr 2020RecognitionCastle Named a 2020 "Best Place to Work in the Bay Area"
- Sep 2019PartnershipHow Castle is Building Codeless Customer Account Protection
5 events tracked since Sep 2019 · selected events shownUnlock the complete Castle timeline
Castle Momentum score
40/ 100
Mandos Momentum blends hiring, funding, traffic and sentiment into one score out of 100. The score is free; the pillars behind it unlock in the platform.
Castle funding
Castle has raised $11.56M in priced equity. Its most recent round was a Venture Round in January 2021.
- Equity raised
- $11.56M5 priced rounds
- Last round
- Venture RoundJan 2021
Castle employees and hiring
Castle competitors
Security professionals most often compare Castle against Imperva and MirrorTab on cybersectools.com. The full competitive set, with overlap scoring, is in the platform.
ranked by CybersecTools comparison demand, 90 days
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The other 440 data points.
- Funding historyevery round, every investor named
- Headcount growthvelocity, departments, seniority
- Open jobslive postings, hiring pace, role mix
- Tech stackframeworks, clouds, security
