Castle

Verified

Intelligent protection against user account fraud and hijacks. Cybersecurity Fraud Detection

Company News Castle Team Profile Cybersecurity Startups Series A Route United States News

About Castle

Castle is tracked on 100Xfounder as a cybersecurity company, founded in 2014, based in San Francisco Bay Area, California, USA, currently mapped to the Series A stage. Intelligent protection against user account fraud and hijacks. Cybersecurity Fraud Detection

Profile snapshot: Founders linked: Castle Team. Funding tracked: $9.00M. Hiring focus: Open Roles. Tech tags: AWS, React, Python, and PostgreSQL.

Recent signals:

Castle appears in the 100Xfounder startup directory import feed.

Why it Matters

Castle is worth tracking because its funding history is already mapped here, including a $9.00M round, the hiring signal points to active work across Open Roles roles, recent coverage is already tied back to this page, and Castle Team's founder profile is linked directly from the company page. Use this page as the starting point before moving into the company news hub, founder profiles, and related market pages.

Funding Snapshot

Total Funding: $9.00MLast Round: Series A Khosla Ventures, $9M Series A in 2019All Rounds: 1

Series A | Khosla Ventures, $9M Series A in 2019

Hiring Roles

This company is actively hiring.

Open Roles

Meet the Founders

Castle Team

Founder & CEO

Founder Profile LinkedIn

Tech Stack

AWSReactPythonPostgreSQL

Last updated: May 12, 2026

Castle research snapshot

This page is assembled from the published company profile, linked founder directory records, and tagged newsroom context already stored on 100Xfounder. It is most useful as a quick starting point before moving into the deeper company, founder, and hub routes below.

Company summary
Intelligent protection against user account fraud and hijacks. Cybersecurity Fraud Detection
Founders covered
Castle Team
Market position
Cybersecurity | Series A | San Francisco Bay Area, California, USA
Newsroom signal
No direct company-tagged stories are mapped yet; use the connected hubs below for broader market context.
Funding signal
$9.00M

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Company News Hub Castle Team United States News Cybersecurity Startups Series A Funding News

Active topics

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Discover Now

Newsroom and topic pages connected to Castle.

Company News Hub Topic Hubs Funding News

No company-specific newsroom stories available yet.

Contextual Research Links

Jump to country, industry, stage, startup taxonomy, and newsroom routes tied to this company.

Company profile→Founder profile→United States startup directory→Startups in United States→Cybersecurity hub→Cybersecurity startup list→Series A startup list→Series A newsroom→Cybersecurity startups in United States→Founder directory→

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FAQs About Castle

Common questions people ask about this profile.

What is Castle?

Intelligent protection against user account fraud and hijacks. Cybersecurity Fraud Detection

Who founded Castle?

Castle is associated with Castle Team on 100Xfounder.

Where is Castle located?

Castle is listed in San Francisco Bay Area, California, USA.

What stage is Castle in?

Castle is currently mapped to Series A. Funding context: Khosla Ventures, $9M Series A in 2019

What is the latest funding round of Castle?

Castle's latest tracked round is Series A Khosla Ventures, $9M Series A in 2019. Total tracked rounds: 1.

Is Castle hiring now?

Castle hiring status: Open Roles.

What technologies does Castle use?

Castle is associated with AWS, React, Python, and PostgreSQL.

Is Castle verified on 100Xfounder?

Yes. Castle is currently marked verified on 100Xfounder as of May 12, 2026.

How can users connect with Castle founders?

Users can move from the company page to any linked founder profiles, review the company news hub, and use listed company links when public contact routes are available.