Castle

+109%

est. 2Y upside i

CybersecuritySeries A

Block bots & bad behavior

Rank

#366

Sector

Cybersecurity, Fraud Detection

Est. Liquidity

~4Y

Data Quality

Data: Low

Castle offers significant upside potential (109% expected) for a job candidate, driven by 66% growth and profitability.

Last updated: July 19, 2026

Bull (25%)+282%

Exit multiple expands to 20x due to IPO window and category leadership, implying exit value $382M; common shares benefit from 282% upside.

Base (35%)+129%

Exit multiple converges to 12x (near public comp average), implying exit value $229M; common shares see 129% upside.

Bear (40%)-16%

Exit multiple compresses to 5x due to competitive pressure from incumbents, implying exit value $95.5M; after preference, common shares decline 16%.

Est. time to liquidity~4.0 years

Preference Stack Risk

moderate

Funding Intensity

1160%

Total preferred stock of $11.6M represents 11.6% of estimated $100M valuation.

Dilution Risk

low

Company is profitable and has not raised since 2019, making near-term dilution unlikely.

Secondary Liquidity

none

No secondary trading activity observed; employee shares likely illiquid until exit.

Engineering & Product — 2 roles

Last updated: March 10, 2026

Questions to Ask at the Interview

Strategic questions based on Castle's data — designed to show you've done your homework.

1
“How does Castle differentiate its behavioral analysis from Cloudflare's bot management?”
2
“What is the historical expansion rate among existing customers?”
3
“Given the long time since last raise, what are the plans for future fundraising or exit?”

Our model estimates +109% upside. What do you think?

Anonymous. Do not share material non-public information.

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Disclaimer: This analysis is AI-generated and does not constitute financial or career advice. Always conduct your own due diligence.