Castle

getcastle.com

Hudson, New York, United States

11-50 employees

LinkedIn Profile

About Castle

software development, insurance agencies and brokerages, overcharge detection, utility rate analysis, transaction monitoring, services, d2c, rebate claim automation, ai receipt extraction, property tax exemptions, investment management, home finance management, home savings optimization, construction and real estate, home expense categorization, secure bill payments, transaction categorization, ai-driven savings insights, property management, home expense tracking

Castle's Tech Stack

AI/ML

Decision Makers at Castle

1 contact

Madeline Hung

Co-Founder and CEO

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18 technologies detected · 1 decision maker · Emails available

Sales Outreach Angle

AWS infrastructure signals engineering sophistication. This company likely evaluates cloud cost management, security tooling, observability, and developer productivity solutions.

Castle's Position in the StackWho Database

• Castle is 1 of 194,140 information technology & services companies tracked in StackWho.
• 193,618 information technology & services companies in our database have verified decision-maker emails (100% of the cohort).
• 23,956 companies in New York are in the StackWho database.
• 74,148 information technology & services companies are in the 11-50 employee range (same size as Castle).

Technology detection from public web signals. Decision-maker contacts compiled from LinkedIn public profiles, company filings, and verified outbound testing. Methodology & sources · Updated August 2026.

Frequently Asked Questions

What technology does Castle use?

Castle uses Cloudflare DNS, Gmail, Google Apps, Amazon AWS, Facebook Widget, Facebook Login (Connect), and 12 more technologies. This data is sourced from StackWho's technology detection engine.

How do I contact the decision makers at Castle?

StackWho has verified email addresses for 1 decision maker at Castle. Pro members can access direct emails for the CEO, CTO, VP of Engineering, and other key contacts. Use StackWho to reach Castle directly for sales, recruiting, or partnerships.

What industry is Castle in?

Castle operates in the information technology & services industry, headquartered in Hudson, New York, United States. StackWho tracks technology stacks and decision maker contacts for companies across all industries.

Can I export Castle's contact data?

Yes. StackWho Pro members can export decision maker contact data for Castle and similar companies to CSV. Use the export feature to build targeted prospect lists segmented by technology stack, industry, or location.