CA

Castle

YC W16

San Francisco, US · 20 employees · 6 known investors

castle.io ↗

Castle builds trust infrastructure for the modern internet, helping organizations detect and prevent fraud and account takeover attacks. The company serves enterprise and mid-market customers requiring security and identity verification solutions.

Founders & leadership· Y Combinator alumni (W16)

Johan BrissmyrinFounder/CEO

Sebastian WallininFounder/CTO

SS

Shardul Shah

Investors · 6

IN

Index Ventures✓ verifiedSan Francisco

Y

Y Combinator✓ verifiedSan Francisco · $500K – $500K

FI

First Round Capital✓ verifiedPhiladelphia · $2M – $2M

F-

F-Prime Capital PartnersBoston

BO

Boost VCreportedSan Mateo

WI

Winklevoss Capitalreported