Discover StartupsCastle

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

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.

Jobs

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Founders

View all team members

Sebastian Wallin

Co-founder & Chief Architect • 12 years

Co-founder and CTO at @Castle. Passionate about using software to solve important problems

Johan Brissmyr

Founder

CEO and Co-founder at @Castle

Funding

View all funding

Valuation

$0

Funded over

3 rounds

Latest round

Series A (Feb 2019)

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