Insights

Growing Market Presence Castle operates in the software development industry with a focus on cybersecurity solutions to prevent fraud, spam, and malicious bot activity. This positioning indicates a potential sales opportunity among enterprise clients seeking to enhance their online security and protect customer accounts.

Target Small to Midsize Firms With a current employee base of 11 to 50 and revenue ranging from 1 million to 10 million dollars, Castle primarily serves small to midsize organizations. Identifying prospects within this segment can lead to tailored security solutions that address their specific digital threat landscape.

Tech Stack Compatibility Castle's technology integrations include Zendesk, SendGrid, and Google Fonts API, suggesting that prospect organizations already utilize cloud-based services and customer support platforms. Sales efforts could focus on highlighting how Castle's solutions seamlessly integrate into existing tech environments.

Competitive Cybersecurity Trends The cybersecurity market is experiencing increased demand driven by rising online fraud and account security concerns. Positioning Castle’s offering as a robust, hassle-free alternative to CAPTCHAs can attract clients seeking innovative and user-friendly security measures.

Potential for Expansion While recent news emphasizes financial and market developments unrelated to Castle’s core, the firm’s focus on modern security threats presents an opportunity to grow customer base by engaging organizations looking to upgrade their fraud prevention technologies amid evolving cyber risks.

Castle Tech Stack

Castle uses 8 technology products and services including Zendesk, SendGrid, Google Fonts API, and more. Explore Castle's tech stack below.

  • Zendesk
    Documentation Tools
  • SendGrid
    Email Delivery
  • Google Fonts API
    Font Scripts
  • Lucide
    Font Scripts
  • Element UI
    Javascript Frameworks
  • JSON-LD
    Javascript Frameworks
  • Castle
    Security
  • Semantic UI
    Web Frameworks

Media & News

Castle's Email Address Formats

Castle uses at least 1 format(s):
Castle Email FormatsExamplePercentage
First.Last@castle.ioJohn.Doe@castle.io
42%
First@castle.ioJohn@castle.io
8%
First.Last@castle.ioJohn.Doe@castle.io
42%
First@castle.ioJohn@castle.io
8%

Frequently Asked Questions

Where is Castle's headquarters located?

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Castle's main headquarters is located at Brooklyn, New York 11249 United States. The company has employees across 5 continents, including North AmericaEuropeAsia.

What is Castle's stock symbol?

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Castle is a publicly traded company; the company's stock symbol is CCI.

What is Castle's official website and social media links?

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Castle's official website is castle.io and has social profiles on LinkedInCrunchbase.

What is Castle's NAICS code?

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Castle's NAICS code is 5112 - Software Publishers.

How many employees does Castle have currently?

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As of February 2026, Castle has approximately 45 employees across 5 continents, including North AmericaEuropeAsia. Key team members include Ceo & Co-Founder: J. B.Vp Of Operations: L. R.Head Of Product & Engineering: A. Z.. Explore Castle's employee directory with LeadIQ.

What industry does Castle belong to?

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Castle operates in the Software Development industry.

What technology does Castle use?

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Castle's tech stack includes ZendeskSendGridGoogle Fonts APILucideElement UIJSON-LDCastleSemantic UI.

What is Castle's email format?

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Castle's email format typically follows the pattern of First.Last@castle.io. Find more Castle email formats with LeadIQ.

When was Castle founded?

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Castle was founded in 2015.

Castle

Software DevelopmentNew York, United States11-50 Employees

Castle lets you block bad bots, account takeovers, transaction fraud, and spam — all without the hassle of CAPTCHAs.

Section iconCompany Overview

Headquarters
Brooklyn, New York 11249 United States
Website
castle.io
Stock Symbol
CCI
NAICS Code
5112 - Software Publishers
Founded
2015
Employees
11-50

Section iconFunding & Financials

  • $10M$25M

    Castle's revenue is estimated to be in the range of $10M$25M

Section iconFunding & Financials

  • $10M$25M

    Castle's revenue is estimated to be in the range of $10M$25M

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