Rule4

rule4.com

Boulder, Colorado, United States

11-50 employees

LinkedIn Profile

About Rule4

it services & it consulting, consulting, incident response, regulatory compliance, machine learning, devops, m&a due diligence, industrial cybersecurity, information technology and services, cybersecurity strategy, penetration testing automation, cloud security, devops security, ot/ics/scada cybersecurity, fedramp, api penetration testing, risk management, cloud forensics, cybersecurity for iiot, ot/ics security

Rule4's Tech Stack

AI/ML

Decision Makers at Rule4

2 contacts

Trent Hein

Co-CEO

t***@rule4.com Sign up to view

Dan Mackin

Co-CEO

d***@rule4.com Sign up to view

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20 technologies detected · 2 decision makers · Emails available

Sales Outreach Angle

WordPress as a CMS signals a content-driven or SMB digital presence. SEO tools, hosting solutions, and page-builder plugins are natural fits for outreach.

Rule4's Position in the StackWho Database

• Rule4 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).
• 7,829 companies in Colorado are in the StackWho database.
• 74,148 information technology & services companies are in the 11-50 employee range (same size as Rule4).

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

Frequently Asked Questions

What technology does Rule4 use?

Rule4 uses Route 53, Mailchimp Mandrill, Gmail, Google Apps, reCAPTCHA, Mobile Friendly, and 14 more technologies. This data is sourced from StackWho's technology detection engine.

How do I contact the decision makers at Rule4?

StackWho has verified email addresses for 2 decision makers at Rule4. Pro members can access direct emails for the CEO, CTO, VP of Engineering, and other key contacts. Use StackWho to reach Rule4 directly for sales, recruiting, or partnerships.

What industry is Rule4 in?

Rule4 operates in the information technology & services industry, headquartered in Boulder, Colorado, United States. StackWho tracks technology stacks and decision maker contacts for companies across all industries.

Can I export Rule4's contact data?

Yes. StackWho Pro members can export decision maker contact data for Rule4 and similar companies to CSV. Use the export feature to build targeted prospect lists segmented by technology stack, industry, or location.