How much funding has Castle raised?

Castle has raised $11.56M in total. Its most recent round was a Venture Round in January 2021.

How many people work at Castle?

About 51, up 2% over the last 30 days, with 1 open roles.

Who are Castle's competitors?

Harness, Qwiet, and Prophaze Technologies Pvt.Ltd. are among the closest in Application Security. The full competitive set, with overlap scoring, is in the platform.

Castle

Application SecuritySan Francisco, United Statesfounded 2015private

Castle is a cybersecurity company specializing in Application Security, founded in 2015 and headquartered in San Francisco, United States. It has raised $11.56M in total funding, employs about 51 people, and is privately held.

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updated Aug 22, 2026

Momentum

21 out of 100.

Momentum blends hiring, funding, traffic and sentiment into one score, recomputed daily. The score is free; the pillars behind it unlock in the platform.

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Marketlocked

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Products

What Castle sells.

Castle Device IntelligenceDevice fingerprinting and intelligence for account security and fraud detectionDetails ↗

In the platform

The other 440 data points.

Funding historyevery round, every lead investor
Headcount growthvelocity, departments, seniority
Open jobs1 live postings, role mix
Tech stackframeworks, clouds, security

Similar in Application Security

FAQ

Common questions about Castle.

How much funding has Castle raised?: Castle has raised $11.56M in total. Its most recent round was a Venture Round in January 2021.
How many people work at Castle?: About 51, up 2% over the last 30 days, with 1 open roles.
Who are Castle's competitors?: Harness, Qwiet, and Prophaze Technologies Pvt.Ltd. are among the closest in Application Security. The full competitive set, with overlap scoring, is in the platform.