+131%

est. 2Y upside i

CybersecuritySeries A

Block bots & bad behavior

Rank

#217

Sector

Cybersecurity

Est. Liquidity

~3Y

Data Quality

Data: Low

Castle shows strong growth and profitability, but faces high competitive risk from incumbents.

Last updated: July 3, 2026

Bull (30%)+208%

Exit multiple expands to 12x as Castle captures IPO window or category leadership, yielding a $229M exit. Driven by sustained 66% growth and profitability.

Base (30%)+156%

Exit multiple converges to 10x, in line with public comps, resulting in a $191M exit. Growth moderates but remains strong.

Bear (40%)+54%

Multiple compresses to 6x due to competition from Cloudflare and Okta, yielding a $114M exit. Common stock recovers after preference stack of $13.7M.

Est. time to liquidity~3.0 years

Preference Stack Risk

moderate

Funding Intensity

1840%

Total preferred stock of $13.7M represents 18.4% of assumed valuation, providing moderate downside protection for investors but limiting common upside in a low exit scenario.

Dilution Risk

low

Company is profitable with $9.3M ARR and no near-term capital needs, so further dilution is unlikely within 2 years.

Secondary Liquidity

none

No secondary market or tender offers have been reported; liquidity will depend on an eventual IPO or acquisition.

Engineering & Product — 2 roles

View all 2 open roles at Castle →

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 from native bot management offered by Cloudflare and AWS?”

  • 2

    “What is the unit economics of the usage-based pricing model as customers scale?”

  • 3

    “Given the lack of recent funding rounds, how do you assess the current equity value and liquidity timeline?”

Community

Valuation Sentiment

Our model estimates +131% upside. What do you think?

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