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Castle company logo
Castle
Defend against bots, fraud, and abuse11-50 Employees
  • B2B
  • Early Stage
    Startup in initial stages
  • Top Investors
    This company has received a significant amount of investment from top investors
  • YC Funded
    Startup funded by Y Combinator
  • 5.0
    Highly rated
    Castle is highly rated on Glassdoor, with 5.0 out of 5 stars
  • 4.7
    Work / Life Balance
    Employees rate Castle 4.7/5 on Glassdoor for work / life balance
  • 5.0
    Strong Leadership
    Employees rate Castle 5.0/5 on Glassdoor for faith in leadership
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Castle careers

Defend against bots, fraud, and abuse
Castle lets you block bad bots, account takeovers, transaction fraud, and spam — all without the hassle of CAPTCHAs.
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Founders
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Sebastian Wallin
Co-founder & Chief Architect • 12 years
Avatar for Sebastian Wallin
Co-founder and CTO at @Castle. Passionate about using software to solve important problems
Johan Brissmyr
Founder
Avatar for Johan Brissmyr
CEO and Co-founder at @Castle
Funding
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Valuation

$0

Funded over

3 rounds

Latest round

Series A (Feb 2019)

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