Castle
What Does Castle Do?
Castle is a cutting-edge fraud detection and account security platform designed to protect online businesses and their users from malicious activities such as account takeover (ATO), payment fraud, and content abuse. By leveraging real-time behavioral analytics, device intelligence, and machine learning, Castle provides dynamic risk scoring and adaptive security responses. This allows businesses to distinguish legitimate users from fraudsters seamlessly, reducing friction for good users while effectively blocking threats. Castle aims to minimize manual reviews, decrease chargebacks, and enhance overall user trust and safety for online platforms, SaaS companies, marketplaces, and financial services.
Where Is Castle's Headquarters?
/cdn.vox-cdn.com/uploads/chorus_image/image/52874413/castle_office_workspace_renovation_money_2.0.jpg)
HQ Function
Serves as the primary center for executive leadership, core engineering, product development, marketing, sales, and operational management.
Notable Features:
Located in the heart of San Francisco's tech hub, likely offering a modern, collaborative workspace designed to foster innovation. Proximity to other tech companies and venture capital.
Work Culture:
Characterized by a fast-paced, innovative, and collaborative environment typical of a growth-stage tech company. Strong emphasis on problem-solving, security expertise, and a mission-driven approach to combating online fraud.
HQ Significance:
Centralizes strategic decision-making, product innovation, and market strategy. Its location in San Francisco provides access to a rich talent pool, a vibrant tech ecosystem, and key industry partnerships.
Values Reflected in HQ: The headquarters likely reflects values such as innovation, security, transparency, and customer focus, through its design and operational ethos.
Location:
Castle operates with a primary headquarters in San Francisco, USA, and a significant engineering office in Krakow, Poland. While these are its main physical hubs, Castle's services are global, protecting businesses and users across numerous countries. They support a worldwide customer base through their cloud-based platform and may have remote team members or distributed support functions to cater to international clients effectively, particularly in North America and Europe.
Street Address:
201 Spear Street, Suite 1100
City:
San Francisco
State/Province:
CA
Country:
USA
Where Else Does Castle Operate Around the World?
Krakow, Poland
Address: Central Krakow (Specific address not publicly listed, often co-working or private office)
Acts as a significant European presence for engineering talent acquisition and product development, contributing to Castle's global R&D efforts and providing support for the EMEA region.
Buying Intent Signals for Castle
Highperformr Signals uncover buying intent and give you clear insights to target the right accounts at the right time — helping your sales, marketing, and GTM teams close more deals, faster.
Who's Leading Castle? Meet the Executive Team
As of April 2025, Castle' leadership includes:
Who's Investing in Castle?
Castle has been backed by several prominent investors over the years, including:
What Leadership Changes Has Castle Seen Recently?
No major high-profile executive hires or departures have been publicly announced by Castle in the last 12 months. The core leadership team appears to be stable.
What Technology (Tech Stack) Is Used byCastle?
Discover the tools Castle uses. Highperformr reveals the technologies powering your target accounts — helping your sales, marketing, and GTM teams prioritize smarter and close faster.
Castle Email Formats and Examples
Castle commonly uses the email format of [first name] followed by @castle.io. This is a frequent pattern for companies of its size and structure, prioritizing simplicity and directness.
[first]@castle.io
Format
johan@castle.io
Example
85%
Success rate
What's the Latest News About Castle?
Castle Blog • December 13, 2023
Castle News: Castle Enhances its SDKs for Improved Developer Experience and Security
Castle announced updates to its Software Development Kits (SDKs) across various platforms. These enhancements are aimed at improving the developer experience, simplifying integration processes, and strengthening security features for both client-side and server-side implementations of Castle's fraud prevention solutions....more
Castle Blog • November 1, 2023
Castle News: Introducing Castle Risk Signals
Castle introduced 'Risk Signals,' a new feature designed to provide customers with more granular insights into the specific user behaviors and data attributes that contribute to a user's overall risk score. This aims to offer greater transparency and enable more actionable fraud prevention strategies....more
Castle Blog • July 19, 2023
Castle News: Castle Achieves SOC 2 Type II Compliance
Castle announced that it has successfully achieved SOC 2 Type II compliance, demonstrating its commitment to maintaining high levels of security, availability, processing integrity, confidentiality, and privacy of customer data. This certification underscores the robustness of Castle's internal controls and security practices....more
Highperformr's free tools for company research
Explore Employees by Region or Country
See where a company’s workforce is located, by country or region.
View Funding Details
View past and recent funding rounds with amounts and investors.
Understand Revenue Insights
Understand company revenue estimates and financial scale.
Track Active Job Openings
Track active roles and hiring trends to spot growth signals.
Review Product and Offerings
Discover what a company offers—products, platforms, and solutions.
Get SIC or NAICS Codes
Get the company’s official SIC and NAICS classifications.
Analyze Website Traffic Trends
Analyze visitor volume, engagement, and top traffic sources.
Discover Social Profiles and Engagement
Explore LinkedIn, Twitter, and other active social profiles.
Identify Top Competitors
Identify top competitors based on similar business traits.
Research and Discover Companies with Highperformr — Smarter, Faster
Explore companies in depth — from the tech they use to recent funding, hiring trends, and buyer signals — all in one powerful view.
Highperformr AI helps you surface the right accounts and enrich your CRM with verified company and contact insights, so your teams can prioritize and engage faster.
- Track intent signals to find buyers who are actively in-market
- Enrich contacts and companies instantly, no need to switch tools
- Automate workflows to stay ahead of every change
- Connect your CRM & tools for seamless data sync and activation
Thousands of companies, including Castle, are just a search away.