COMPANY PROFILE · UPDATED 18 NOV 2025

Castle

A fully automated approach to account security that lets your good users shape the risk models.

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Founded: 2015
Headcount: 23
Open roles: 2
Last raised: Series A · Sign in to view

TECH STACK

How Castle builds

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LEADERSHIP

Founders & key people

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OPEN ROLES

Hiring at Castle

FUNDING

Capital raised

Total raised

$11,560,000

Investors

Funding rounds

Series A
Index Ventures, F-Prime Capital, René Bonvanie, Olivier Pomel, First Round Capital, Y Combinator, Zack Urlocker
$9.2MFeb 7, 2019
Seed
First Round Capital, FundersClub, Y Combinator, F-Prime Capital, Rising Tide Fund, Liquid 2 Ventures, Jenny Haeg, Ludwig Pettersson, Othman Laraki, Charlie Songhurst, Ben Holzman, Ryan Petersen, Johan Lorenzen, Amos Elliston, Brainchild Holdings, Hard Yaka, Wei Guo, UpHonest Capital
$2MNov 8, 2016
Seed
SparkLabs Global Ventures, Hampus Jakobsson, Henrik Torstensson, Fredrik Nylander, Anders Frankel, Johan Lorenzen, Erik Byrenius, Tim Jackson, Walking Ventures
$360KFeb 11, 2015

Funding data via Diffbot

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TAGS

Categorized in

Industry

Cybersecurity Identity & Access Threat Detection & Response

Investors

Y Combinator First Round Capital Sv Angel Index Ventures

Industries

Software Companies Software As A Service Companies

Tech Stack

Php Ruby Node.js Nodejs

LOCATIONS

Where they work

Castle offices

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Cambridge, MA
San Francisco, CA

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SIMILAR COMPANIES

Companies like Castle

Similar companies

Agency

Seed

Saviynt

Series B

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