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.

Michael Sutton

Founder

28 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 is a cybersecurity company that reduces false positives by filtering pointless Internet background noise. It collects, analyzes, and labels mass internet scan and attack activity into a feed of Anti-Threat Intelligence. This context helps security teams reduce noise and prioritize signal - targeted attacks against their organization. Its drive to maximize analyst efficiency is delivered through its API, platform integrations, and visualizer. The company was founded in 2017 and is based in Washington, District of Columbia.

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. specializes in developing comprehensive security solutions tailored for distributed offices, very small businesses, and advanced networks. The company offers a versatile networking and security platform that integrates Secure Access Service Edge (SASE), Security Information and Event Management (SIEM), and Governance, Risk, and Compliance (GRC) functionalities. Todyl's Secure Global Network is a cloud-native platform designed to facilitate secure communication among multiple offices, remote employees, data centers, and cloud services. Its services include secure routing, firewall management, secure DNS with Active Directory integration, cloud VPN, web proxy features, intrusion detection and prevention, content filtering, and malware scanning, among others. The platform emphasizes a Zero Trust approach to security, aiming to mitigate threats such as ransomware and fileless malware. By consolidating various security measures, Todyl enables managed service providers and security service providers to offer effective security solutions to businesses of all sizes. Founded in 2015 and based in Brooklyn, New York, Todyl is committed to delivering cost-effective security programs that address contemporary security challenges.

Viso Trust

Seed Round in 2021
Viso Trust, founded in 2016 and based in San Francisco, California, offers a platform designed to streamline vendor security due diligence. The company provides decision-makers with reliable and comprehensive vendor security information, enabling them to conduct informed risk assessments efficiently. By simplifying the vendor review process, Viso Trust aims to enhance the security evaluation landscape for organizations.

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 designed for developers to seamlessly integrate authorization management into their applications. Founded in 2020 and headquartered in Sunnyvale, California, with an additional office in Tel Aviv, Israel, the company focuses on providing tools that facilitate easy deployment, ecosystem integrations, and code extensibility. This enables developers to efficiently manage authorization policies within their software, enhancing security and compliance.

GreyNoise Intelligence

Seed Round in 2020
GreyNoise is a cybersecurity company that reduces false positives by filtering pointless Internet background noise. It collects, analyzes, and labels mass internet scan and attack activity into a feed of Anti-Threat Intelligence. This context helps security teams reduce noise and prioritize signal - targeted attacks against their organization. Its drive to maximize analyst efficiency is delivered through its API, platform integrations, and visualizer. The company was founded in 2017 and is based in Washington, District of Columbia.

SecureCircle

Seed Round in 2020
SecureCircle delivers a SaaS-based cybersecurity service that extends Zero Trust security to data on the endpoint. At SecureCircle, we believe frictionless data security drives business value for our customers. End users operate without obstacles, while data is continuously secured against breaches and insider threats. Instead of relying on complex reactive measures, we simply secure data persistently in transit, at rest, and even in use.

Todyl

Venture Round in 2020
Todyl, Inc. specializes in developing comprehensive security solutions tailored for distributed offices, very small businesses, and advanced networks. The company offers a versatile networking and security platform that integrates Secure Access Service Edge (SASE), Security Information and Event Management (SIEM), and Governance, Risk, and Compliance (GRC) functionalities. Todyl's Secure Global Network is a cloud-native platform designed to facilitate secure communication among multiple offices, remote employees, data centers, and cloud services. Its services include secure routing, firewall management, secure DNS with Active Directory integration, cloud VPN, web proxy features, intrusion detection and prevention, content filtering, and malware scanning, among others. The platform emphasizes a Zero Trust approach to security, aiming to mitigate threats such as ransomware and fileless malware. By consolidating various security measures, Todyl enables managed service providers and security service providers to offer effective security solutions to businesses of all sizes. Founded in 2015 and based in Brooklyn, New York, Todyl is committed to delivering cost-effective security programs that address contemporary security challenges.

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, Inc.

Venture Round in 2020
Feroot, Inc. is a Toronto-based company founded in 2017 that specializes in intrusion and threat detection for web applications. It has developed an all-in-one client-side risk management platform designed to protect sensitive data assets, including credit card information, login credentials, and electronic protected health information (ePHI). The platform offers a range of features such as attack surface monitoring, real-time notifications, security access analysis, and asset discovery. Additionally, it provides functionality for alerts and notifications, data skimming detection, unauthorized data transfer, and forensic analysis. By automating these processes, Feroot enables organizations to effectively manage and secure their client-side data while responding to potential threats.

Cybrary

Series B in 2019
Cybrary Inc. is an online platform that specializes in information technology and cybersecurity training, catering to a diverse audience that includes beginners, experienced professionals, and families globally. Founded in 2015 and based in College Park, Maryland, the company offers a wide range of training courses covering areas such as systems and network administration, cybersecurity fundamentals, and advanced topics like ethical hacking and penetration testing. Cybrary provides various resources, including instructional lectures, interactive labs, exam study guides, and case studies. It also offers enterprise training solutions, security awareness programs, and tools for educators to incorporate cybersecurity into their curricula. The platform fosters collaboration with an elite community of instructors and industry experts, enabling companies to contribute courses and recruit talent. Additionally, Cybrary's "Teams" product allows organizations to manage employee training, complete with practical labs and skill assessments, making it a comprehensive resource for both individual learners and enterprises seeking to enhance their workforce's skills.

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 is a cybersecurity company that reduces false positives by filtering pointless Internet background noise. It collects, analyzes, and labels mass internet scan and attack activity into a feed of Anti-Threat Intelligence. This context helps security teams reduce noise and prioritize signal - targeted attacks against their organization. Its drive to maximize analyst efficiency is delivered through its API, platform integrations, and visualizer. The company was founded in 2017 and is based in Washington, District of Columbia.

Scytale.io

Series A in 2019
Scytale Inc. develops an identity management platform designed for cloud, container, and on-premise infrastructure. Founded in 2017 and headquartered in San Francisco, California, the company offers Scytale Enterprise, which standardizes service authentication across various cloud platforms. Additionally, Scytale Essentials provides annual subscription services for critical bug fixes and security patches for a production-hardened distribution of SPIRE. The company also offers Scytale Professional Services, which includes advisory support for planning, deployment, and scaling of SPIRE, along with open-source projects that facilitate service identity for microservices deployed in cloud and container environments. Founded by experienced engineers from notable tech companies, Scytale aims to help enterprise engineers build secure and efficient identity-driven distributed software systems amidst the complexities of modern IT environments. As of February 2020, Scytale operates as a subsidiary of Hewlett Packard Enterprise Company.

Racktop Systems

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.

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.

Emu Technology

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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