About Castle
Castle provides developer-grade infrastructure to stop bots, abuse, and fraud for online businesses. Its platform uses device fingerprinting, behavioral analytics, and real-time signals to prevent account takeovers, fake signups, credential stuffing, and multi-accounting — all without CAPTCHAs. Customers include Canva, Rockstar Games, and Atlassian.
Company details
Funding
Total raised
$11.7M
Last stage
Series A
Investors
Founders
Johan Brissmyr
Co-founder of Castle, a user identity company based in San Francisco that provides solutions for user security and account takeover prevention.
LinkedInSebastian Wallin
Co-founder of Castle, a user identity company based in San Francisco that provides solutions for user security and account takeover prevention.
What happens next.
No applications, no recruiter spam. Just the intro.
Confirm the fit
A few questions to make sure this role is the right shape for you. Two minutes.
I pitch you to the company
I write the intro, send it to the founder, and handle the back-and-forth.
A meeting lands on your calendar
If they’re a yes, I book the chat. You show up — that’s the whole job-hunt.