StoneMill Ventures

StoneMill Ventures is a venture capital firm based in Arlington, Virginia, established in 2018. The firm specializes in investing in seed stage disruptive cyber security companies, particularly within the Washington, DC metro area. StoneMill Ventures takes an active investment approach, focusing on founding teams that can leverage their experience in building innovative security companies.

29 past transactions

Binarly

Seed Round in 2022
Developer of a supply chain security platform intended to protect devices from emerging firmware and hardware threats. The company's platform performs in-depth introspection of firmware and uses proprietary machine learning and code analysis techniques to find unknown threats, enabling clients to easily add the missing layer of defense and detect threats originating below the operating system.

GreyNoise Intelligence

Series A in 2022
GreyNoise Intelligence Inc. is a cybersecurity company established in 2017 and headquartered in Washington, D.C. The company specializes in collecting and analyzing data related to Internet-wide scanning and attack activities, effectively filtering out irrelevant background noise to reduce false positives. By labeling and categorizing this mass Internet activity, GreyNoise provides organizations with Anti-Threat Intelligence, which helps security teams focus on genuine threats rather than distractions. Its platform enhances analyst efficiency through various tools, including an API, platform integrations, and a visualizer. Additionally, GreyNoise offers a free service called GreyNoise Alerts, which notifies organizations of suspicious activities detected on their networks.

LimaCharlie

Seed Round in 2022
LimaCharlie is a provider of Security Infrastructure as a Service (SIaaS), offering a platform designed to streamline information security management. By delivering security tools on-demand, LimaCharlie enables businesses to efficiently manage their cloud security while significantly reducing costs and effort. The platform includes endpoint-driven security tools, telemetry storage, and a comprehensive incident response pipeline, allowing users to create custom detection and response rules. Additionally, LimaCharlie equips organizations with the necessary resources to operate a Managed Security Service Provider (MSSP) or Security Operations Center (SOC). The availability of APIs further allows users to build and monetize their own security products, making it a versatile solution in the field of information security.

Todyl

Series A in 2022
Todyl, Inc. is a provider of security solutions tailored for distributed offices, small businesses, and advanced networks. Its primary offering is a comprehensive networking and security platform that integrates various functionalities, including security as a service (SASE), security information and event management (SIEM), and governance, risk, and compliance (GRC). The platform, known as the Secure Global Network, facilitates secure communication among multiple offices, remote employees, and cloud services. It encompasses features such as secure routing, firewall management, secure DNS, cloud VPN, intrusion detection, content filtering, and real-time threat analysis. Todyl's technology aims to simplify cybersecurity by reducing complexity and operational costs while providing automatic updates and advanced protection against threats like ransomware. The company, incorporated in 2015 and based in Brooklyn, New York, enables partners to deliver robust and cost-effective security solutions for businesses of all sizes.

Gradient MSP

Series A in 2021
Operator of an integration platform designed to offer IT channel ecosystem business automation. The company offers a frictionless IT channel ecosystem and an open API for any channel vendor to integrate across nine PSA platforms for reseller billing reconciliation and alert monitoring with a single integration, enabling clients to help MSPs run a smoother service business by connecting all the solutions they resell and use to their PSA platforms.

VISO Trust

Seed Round in 2021
VISO Trust is a San Francisco-based company founded in 2016 that specializes in vendor security due diligence. The company has developed a platform that provides comprehensive and actionable information regarding vendor security risks. This platform enables decision-makers to conduct informed risk assessments and make sound security choices by streamlining the vendor review process. By delivering reliable data, VISO Trust assists enterprises in managing third-party security risks effectively and transparently, ultimately enhancing their overall cybersecurity posture.

Grip Security

Seed Round in 2021
Grip Security specializes in SaaS security, providing organizations with extensive visibility into their entire portfolio of SaaS applications, whether known or unknown. The company's security application is designed to enforce security policies and prevent data loss, ensuring accurate monitoring of applications and user interactions. By minimizing false positives, Grip Security enables clients to maintain a secure network within their workspaces while facilitating quick deployment of its solutions, typically within minutes.

Build.Security

Seed Round in 2020
Build.Security Ltd. offers an authorization policy management platform aimed at helping developers integrate authorization controls directly into their applications. Founded in 2020 and headquartered in Sunnyvale, California, with an additional office in Tel Aviv, Israel, the company provides a solution that allows for fine-grained access controls and decoupled logic. Its platform enables seamless deployment, ecosystem integrations, and code extensibility, allowing developers to explore various policy strategies and monitor their effects in real-time. This approach supports the generation and management of authorization controls across enterprise applications at scale, facilitating safer and more efficient application development.

GreyNoise Intelligence

Seed Round in 2020
GreyNoise Intelligence Inc. is a cybersecurity company established in 2017 and headquartered in Washington, D.C. The company specializes in collecting and analyzing data related to Internet-wide scanning and attack activities, effectively filtering out irrelevant background noise to reduce false positives. By labeling and categorizing this mass Internet activity, GreyNoise provides organizations with Anti-Threat Intelligence, which helps security teams focus on genuine threats rather than distractions. Its platform enhances analyst efficiency through various tools, including an API, platform integrations, and a visualizer. Additionally, GreyNoise offers a free service called GreyNoise Alerts, which notifies organizations of suspicious activities detected on their networks.

SecureCircle

Seed Round in 2020
SecureCircle LLC is a cybersecurity company focused on eliminating insider threats through data-centric access control solutions. Founded in 2015 and based in Santa Clara, California, it offers a Software as a Service (SaaS) platform that applies Zero Trust principles to protect data on endpoints. The company's offerings include a range of services such as continuous data protection, access control, and visibility, all aimed at safeguarding sensitive information and corporate intellectual property. SecureCircle employs transparent file encryption technology to ensure that data remains secure, visible, and controlled regardless of its format or storage location. By enabling frictionless data security, SecureCircle allows users to operate without obstacles while continuously protecting against breaches and insider threats.

Todyl

Venture Round in 2020
Todyl, Inc. is a provider of security solutions tailored for distributed offices, small businesses, and advanced networks. Its primary offering is a comprehensive networking and security platform that integrates various functionalities, including security as a service (SASE), security information and event management (SIEM), and governance, risk, and compliance (GRC). The platform, known as the Secure Global Network, facilitates secure communication among multiple offices, remote employees, and cloud services. It encompasses features such as secure routing, firewall management, secure DNS, cloud VPN, intrusion detection, content filtering, and real-time threat analysis. Todyl's technology aims to simplify cybersecurity by reducing complexity and operational costs while providing automatic updates and advanced protection against threats like ransomware. The company, incorporated in 2015 and based in Brooklyn, New York, enables partners to deliver robust and cost-effective security solutions for businesses of all sizes.

Attila

Series A in 2020
Attila Security, Inc. specializes in developing security solutions for networks and data access across virtual and cloud applications. Founded in 2018 and based in Columbia, Maryland, the company offers a range of products including the GoSilent Cube, a portable enterprise-grade firewall and virtual private network, GoSilent Global, which provides secure data access through dual Internet protocol obfuscation, and GoSilent Server, designed for accessing data center applications and cloud services. Attila's technology aims to protect various devices, such as servers, desktops, laptops, smartphones, and IoT devices, from cyber threats, addressing the significant economic impact of cybercrime. The company serves both government entities and enterprises, ensuring that sensitive data remains secure as it is accessed by employees across different platforms.

DeepSig

Series A in 2020
DeepSig is an early-stage startup that develops deep learning software to reinvent wireless communications. By replacing core wireless technology with deep learning, DeepSig makes communication systems faster, more cost-efficient, more secure, and able to excel in complex environments. It uses machine learning (ML) and artificial intelligence (AI) to learn optimized models directly from data rather than manually designing specialized algorithms, transforming wireless for 5G, IoT, and security.

Feroot

Venture Round in 2020
Feroot, Inc. is a cybersecurity company based in Toronto, Canada, founded in 2017. It specializes in developing a client-side risk management platform aimed at protecting web applications from various cybersecurity threats and compliance violations. The platform offers a comprehensive suite of features, including attack surface monitoring, real-time notifications, security access analysis, and asset discovery. It is designed to safeguard sensitive data, such as credit card information and login credentials, while also addressing risks associated with client-side JavaScript code. Feroot's solutions help businesses predict risks, mitigate potential penalties, and ensure compliance with privacy regulations by managing data-use restrictions effectively.

Cybrary

Series B in 2019
Cybrary Inc. is an online platform that specializes in providing information technology and cybersecurity training for individuals and organizations globally. Founded in 2015 and based in College Park, Maryland, Cybrary offers a wide range of courses covering systems and network administration, project management, and various cybersecurity topics, including penetration testing, ethical hacking, and malware analysis. The platform is designed to facilitate learning for all skill levels, from beginners to experienced professionals. Cybrary also features a community of instructors and experts who contribute to its growing catalog of high-quality content, which is accessible anytime and anywhere. In addition, the platform provides tools for enterprises, including team management for employee training, hands-on challenges, and practical labs. The company is dedicated to serving underserved populations and helping individuals advance in their careers.

Vulcan Cyber

Series A in 2019
Vulcan Cyber Ltd. operates a vulnerability remediation platform designed to assist enterprises in detecting and addressing vulnerabilities in their software and code efficiently. Founded in 2018 and headquartered in Tel Aviv, Israel, with an office in San Francisco, the company integrates and automates existing security tools and processes to provide security teams with the necessary insights to eliminate vulnerabilities in production systems. By leveraging data from various scanning tools and employing advanced exposure analytics, Vulcan Cyber offers a clear understanding of the risks posed by vulnerabilities within an organization’s infrastructure. Its platform combines proprietary remediation intelligence with enterprise vulnerability data, enabling organizations to prioritize and address the most critical vulnerabilities effectively.

TrueFort

Series A in 2019
TrueFort Inc. specializes in real-time application and cloud workload protection solutions, addressing the security needs of modern enterprises. Founded in 2015 and based in Weehawken, New Jersey, the company focuses on securing application environments, which are increasingly targeted by cyber threats. TrueFort's Fortress solution integrates telemetry from existing agents, offering a comprehensive approach that surpasses traditional point or infrastructure-focused security measures. It provides users with a unified console for policy management and reporting, enabling organizations to measure and enhance their risk posture effectively.

Orca Security

Seed Round in 2019
Orca Security Ltd. is a company that specializes in cloud-native security solutions, providing a platform that secures both cloud-native and legacy applications migrated to the cloud. Founded in 2019 and based in Tel Aviv, Israel, Orca's technology integrates directly into the cloud infrastructure layer, allowing for comprehensive security assessments of various assets, including the cloud control plane, operating systems, applications, and business data. The platform delivers visibility into compromised resources, vulnerable software, and misconfigurations without the need for agents, thus maintaining performance and availability. By offering cloud-wide, workload-deep security and compliance across major cloud providers like AWS, Azure, and Google Cloud, Orca Security helps organizations identify critical vulnerabilities and attack vectors efficiently, minimizing the operational costs and alert fatigue associated with traditional security tools.

GreyNoise Intelligence

Pre Seed Round in 2019
GreyNoise Intelligence Inc. is a cybersecurity company established in 2017 and headquartered in Washington, D.C. The company specializes in collecting and analyzing data related to Internet-wide scanning and attack activities, effectively filtering out irrelevant background noise to reduce false positives. By labeling and categorizing this mass Internet activity, GreyNoise provides organizations with Anti-Threat Intelligence, which helps security teams focus on genuine threats rather than distractions. Its platform enhances analyst efficiency through various tools, including an API, platform integrations, and a visualizer. Additionally, GreyNoise offers a free service called GreyNoise Alerts, which notifies organizations of suspicious activities detected on their networks.

NS8

Series B in 2019
NS8 Inc. is a fraud prevention and user experience protection platform based in Las Vegas, Nevada, with additional offices in Miami Beach, Florida, and Amsterdam, the Netherlands. Founded in 2016, the company offers a suite of tools designed to help online businesses minimize risk through its NS8 Antifraud platform. This platform utilizes machine learning, behavioral analytics, real-time scoring, and fraud pattern detection to identify and address fraudulent activities. It provides insights into bot detection and hidden session segmentation, enabling users to understand effective traffic sources. Additionally, NS8's platform offers consumer metrics that allow businesses to display customized content and track the performance of various sales techniques. The company serves a diverse range of industries, including ecommerce platforms, online merchants, payment gateways, and event ticketing sectors. In October 2020, NS8 filed for reorganization under Chapter 11 in the U.S. Bankruptcy Court for the District of Delaware.

RackTop

Series A in 2019
RackTop was founded by intelligence community veterans who have been solving the most complex data and security problems for over two decades. Today, RackTop develops innovative software products that are revolutionizing the data storage industry by combining high-performance network attached storage with advanced security to solve the most difficult compliance and cyber security challenges facing the modern enterprise. RackTop’s products are unified under a single platform, offering reduced complexity, improved security, and significant cost savings over traditional solutions.

Scytale.io

Series A in 2019
Scytale Inc. is a technology company that specializes in identity management solutions for cloud, container, and on-premise infrastructures. Founded in 2017 and headquartered in San Francisco, the company offers Scytale Enterprise to standardize service authentication across various cloud platforms and Scytale Essentials, an annual subscription service that provides essential bug fixes and security updates for its SPIRE distribution. Additionally, Scytale provides advisory services through Scytale Professional Services, helping enterprises with the planning, deployment, and scaling of SPIRE. The company also contributes to open-source projects designed to facilitate service identity for microservices in cloud and container environments. Founded by experienced engineers from leading technology firms, Scytale aims to help organizations navigate the complexities of modern enterprise IT and enhance the security and efficiency of their distributed software systems.

Huntress

Seed Round in 2019
Huntress is an information technology company that provides threat detection and actionable cybersecurity intelligence. It empowers IT Departments and Managed Service Providers (MSP) to expand their capabilities and confidently address their customers’ most complex cybersecurity challenges. The company was founded in 2015 and headquartered in Maryland, United States.

Anno.Ai

Seed Round in 2019
Anno.Ai operates a hosted platform designed to facilitate the curation of training data for machine learning operations. The platform enables users to create projects, customize labels, invite team members, and upload data essential for machine learning models and data annotation. By focusing on structuring unstructured data, Anno.Ai aims to develop AI-driven applications and sensors that open new business opportunities. The company is headquartered in Tysons Corner, Virginia.

Lucata

Convertible Note in 2018
Emu Technology is focused on developing innovative hardware and software solutions that enhance memory utilization and eliminate data bottlenecks in microprocessors. Founded in 2004 and headquartered in South Bend, Indiana, the company has established strategic partnerships with notable firms such as Graham Allen Partners, Aunalytics, Data Realty, and Qumulus Solutions. A key offering from Emu Technology is the next-generation Lucata computer architecture, which significantly accelerates graph analytics, allowing organizations to conduct high-performance, multi-hop analytics on vast databases with up to one trillion vertices. This architecture leverages patented migrating thread technology to scale unified memory and facilitates deeper data analysis using existing graph database software or custom solutions. Emu Technology's solutions are applicable across various sectors, including financial services, cybersecurity, healthcare, telecommunications, and government, thereby enabling organizations to harness the power of advanced analytics and machine learning.

SCYTHE

Seed Round in 2018
Scythe Inc. is a cybersecurity company based in Arlington, Virginia, founded in 2017. The company specializes in designing and developing a platform that enables organizations to create and simulate various adversarial campaigns. This capability allows businesses to rigorously test their security controls with a high level of detail, helping them identify vulnerabilities and improve their overall security posture. By providing a comprehensive environment for security testing, Scythe aims to enhance organizational resilience against potential cyber threats.

Vulcan Cyber

Seed Round in 2018
Vulcan Cyber Ltd. operates a vulnerability remediation platform designed to assist enterprises in detecting and addressing vulnerabilities in their software and code efficiently. Founded in 2018 and headquartered in Tel Aviv, Israel, with an office in San Francisco, the company integrates and automates existing security tools and processes to provide security teams with the necessary insights to eliminate vulnerabilities in production systems. By leveraging data from various scanning tools and employing advanced exposure analytics, Vulcan Cyber offers a clear understanding of the risks posed by vulnerabilities within an organization’s infrastructure. Its platform combines proprietary remediation intelligence with enterprise vulnerability data, enabling organizations to prioritize and address the most critical vulnerabilities effectively.

HighSide

Seed Round in 2017
Powered by a distributed cryptographic key management infrastructure, HighSide’s suite of products enable businesses to engage securely in a remote first world. At HighSide we build technology to enable the modern business addressing challenges in productivity, sharing and engagement typically stymied by data security and data access requirements. Through our zero-trust technology, teams have access to a modern unified communications and file sharing platform including voice, video, text and files, reducing risk of shadow IT and reliance on dated and insecure communications channels.
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