ThreatSTOP
Carlsbad, US · Founded 2009 · Delaware corporation
Find your way into ThreatSTOP
327 people in our graph share verified history with the ThreatSTOP team — schools, employers, funds. One of them is your warm intro.
Mike Fridgenunlockedknows KAREN BYRNES · together at UW Foster School of Business (overlapped)
×6knows the team · via UW Foster School of Business
knows the team · via University of Washington
×2knows the team · via UC San Diego
×2knows the team · via Providence College
ThreatSTOP provides a protective DNS security service that blocks malicious DNS resolution requests and IP connection attempts using 600+ threat categories, protecting networks from phishing, ransomware, malware, and unwanted traffic. It integrates with DNS servers, firewalls, routers, and cloud infrastructure and serves education, healthcare, enterprise, SMBs, service providers, and managed service providers.
Founders & leadership
ThreatSTOP was founded in 2009 by TOMAS L. BYRNES.
TL
TOMAS L. BYRNESinCEO and FounderTomas L. Byrnes is an executive with over 25 years of experience in technical leadership, network infrastructure design, and company building; he has held executive and director roles at multiple companies and has been involved in ventures that created over $600 million in enterprise value.
KB
KAREN BYRNESinFinancial Planning and Analysis Consultant2009–2021Karen Byrnes is an executive officer at ThreatSTOP with over 25 years of experience in accounting and finance at technology startups, including involvement in equity and debt funding rounds, M&A transactions, and financial reporting to boards and investors.
Board
SH
SEAN HAFEEZBoard director
JE
JOEL EVANIERBoard director
TB
THOMAS BENNETTBoard director
DE
DAVID EHRLICHBoard director
Reported raises · per SEC filings
Form D private placements$4.8M disclosed across 1 round · 2015
▶$4.8MraisedOct 2015 · 6 investors · OtherRule 506(b)
▶$4.8MraisedOct 2015 · 6 investors · Other
Rule 506(b)Officers, directors & promoters on the filing
- SEAN HAFEEZDirector
- TOMAS L. BYRNESExecutive Officer, Director
- JOEL EVANIERDirector
- THOMAS BENNETTDirector
- KAREN BYRNESExecutive Officer
- DAVID EHRLICHDirector
- Offering amount
- $4.8M
- Amount sold
- $4.8M
- First sale
- Feb 2015
- Incorporated
- Corporation, Delaware
- Federal exemptions
- 06b
Source: SEC EDGAR Form D. Amounts as filed; amended filings shown once at their latest values.
Competitors · 8
by search overlap
Palo Alto Networks80 shared keywordsPalo Alto Networks provides cybersecurity platforms and services to protect organizations' digital infrastructure across cloud, network, and security operations. The company serves enterprise organizations, governments, financial institutions, utilities, and healthcare providers globally.
Cloudflare Turnstile75 shared keywordsCloudflare provides a global cloud network platform delivering security, performance, and development services through sixty-plus integrated services including SASE, application security, and full-stack development infrastructure.
ArrowPoint72 shared keywordsCisco provides networking, data center, and security technology for enterprises, including infrastructure to run traditional and AI workloads and tools to keep organizations running against cyberattacks and outages. Its platform connects networking devices and monitors security events across corporate networks.
Instart60 shared keywordsInstart was a Palo Alto-based web content delivery and application performance company whose assets Akamai acquired in 2020.
Check Point Software58 shared keywordsCheck Point Software Technologies is a cybersecurity company providing security products and solutions. This page is its investor relations section, containing annual reports, SEC filings, financial results, and corporate governance information.
Spiceworks55 shared keywordsSocial business network for IT that is transforming how $1 trillion worth of technology products and services is marketed and sold each year to small and mid-sized businesses worldwide.
Infoblox48 shared keywordsInfoblox provides DNS, DHCP and IP address management (DDI) along with DNS-based security services for hybrid and multi-cloud enterprise networks. Its cloud-native, SaaS-based platform serves large organizations, helping NetOps, SecOps and CloudOps teams manage core network services and security.
Trend Micro46 shared keywordsTrendAI (Trend Micro) provides enterprise cybersecurity through its TrendAI Vision One platform, which unifies endpoint, network, cloud, and identity security with XDR visibility, threat intelligence, and AI-focused threat protection. It serves enterprise customers across 185 countries, including hybrid cloud, virtualized data center, and modern SOC environments.
Companies competing with ThreatSTOP for the same Google search keywords, organic and paid, via search-intersection analysis.
Non-dilutive funding · 1 SBIR/STTR award
Federal grants — no equity taken| Agency | Phase | Year | Amount |
|---|---|---|---|
| Department of Homeland Security | Phase I | 2010 | $91.5K |
Source: SBIR.gov award data (U.S. Small Business Administration). SBIR/STTR awards are competitive federal R&D grants and contracts — non-dilutive capital alongside any venture rounds above.
In the news
Frequently asked questions
- What does ThreatSTOP do?
- ThreatSTOP provides a protective DNS security service that blocks malicious DNS resolution requests and IP connection attempts using 600+ threat categories, protecting networks from phishing, ransomware, malware, and unwanted traffic. It integrates with DNS servers, firewalls, routers, and cloud infrastructure and serves education, healthcare, enterprise, SMBs, service providers, and managed service providers.
- Who founded ThreatSTOP?
- ThreatSTOP was founded by TOMAS L. BYRNES in 2009.
- How much funding has ThreatSTOP raised?
- ThreatSTOP has disclosed $4.8M raised across 1 round.
- Where is ThreatSTOP headquartered?
- ThreatSTOP is headquartered in Carlsbad, US.