J2 Ventures

J2 Ventures, established in 2020 and headquartered in Boston, Massachusetts, with an additional office in New York, is a venture capital firm focused on investing in early-stage companies. The firm specializes in leading-edge technology with dual-use applications, benefiting both national security and the commercial sector. J2 Ventures primarily invests in startups operating in artificial intelligence, machine learning, healthcare, and material science. As a Registered Investment Adviser (RIA), the firm is committed to providing strategic guidance and resources to its portfolio companies.

Jonathan Bronson Ph.D

Co-Founder and Managing Partner

Matt Goldman

Partner

William Hallisey

Principal

Alexander Harstrick

Co-Founder and Managing Partner

Yeri Lopez

Venture Partner

36 past transactions

LightSource

Series A in 2025
LightSource develops a supply chain management platform to help professionals collaborate with their suppliers. It also allows collaborating with teammates on strategic sourcing projects, sending RFQs to suppliers and collecting quotes, and comparing bids using insights automatically extracted from the normal day-to-day work. The company was founded in 2021 and is headquartered in San Francisco, California.

Musubi

Seed Round in 2025
Musubi is an AI company specializing in content moderation and fraud detection for social media platforms. It deploys an AI moderator to identify and remove malicious users and harmful content, ensuring safe and secure environments on social media.

Lumia Health

Venture Round in 2025
Lumia Health is a digital health company focused on enhancing the quality of life for individuals with cardiovascular and neurological diseases, particularly those experiencing orthostatic syndromes. The company develops sensor-enabled wearable products, including an in-ear device, that leverage artificial intelligence to analyze blood flow to the head. This technology allows for real-time monitoring and understanding of symptoms such as dizziness, brain fog, headaches, fainting, and fatigue that arise when standing. By providing patients with crucial health data at the right time, Lumia Health empowers them to proactively manage their conditions and prevent potential health crises.

Micron Biomedical

Series A in 2025
Micron Biomedical is a clinical-stage biopharmaceutical company founded in 2014 and based in Atlanta, Georgia. The company focuses on developing innovative microneedle patches designed for administering vaccines, specifically targeting influenza and polio. Its proprietary microneedle technology aims to enhance the protective and therapeutic effects of vaccines while improving patient compliance and simplifying the administration process. Through its advanced delivery methods, Micron Biomedical seeks to facilitate the development of vaccines that can address critical healthcare needs.

Holly

Pre Seed Round in 2025
Holly is an AI-driven company specializing in modernizing government hiring processes. It operates a human resource technology platform that provides AI-powered tools and databases to enhance job postings, offer data-driven salary insights, and facilitate informed compensation planning and performance management. By delivering real-time data, Holly helps public sector organizations eliminate hiring barriers, improve employee satisfaction, and streamline their recruitment processes.

Druid Software

Venture Round in 2025
Druid Software specializes in developing private cellular network platforms, focusing on 4G and 5G technology. Its core offerings include virtualized mobile core network technology and services, catering primarily to business users. Druid's solutions encompass 4G, 3G, and 2G core and access network technology, enabling global system integrators and network equipment providers to deliver tailored mobile communication solutions for enterprise needs.

Parallel Fluidics

Seed Round in 2024
Parallel Fluidics is a Boston-based microfluidics manufacturing company established in 2019. It addresses a significant challenge encountered by engineers in obtaining high-quality microfluidic prototypes quickly. The company has developed a microfluidic design platform that enhances the prototyping process, allowing researchers to focus on their scientific work rather than sourcing components. By facilitating a transition from concept to scalable design, Parallel Fluidics aims to contribute to advancements in human health globally through its innovative products.

Safi Biosolutions

Seed Round in 2024
As the cell therapy commercialization partner of a 5-year Department of Defense program to manufacture on-demand blood products, Safi Biosolutions and its collaborators are working to ‘crack the code’ of Cell Therapy 2.0 challenges of manufacturing at appropriate scale, high consistency of product, and economically viable cost of goods by integrating world-leading expertise in cord blood stem cell expansion, bioprocessing optimization, manufacturing scale-up and cryostorage.

Mesa Quantum

Seed Round in 2024
Mesa Quantum is an electronics manufacturing company specializing in quantum technology solutions. The company develops advanced photonic quantum computing hardware, which aims to transform computing capabilities by offering an integrated photonic quantum computing chip designed to encode and manipulate quantum information. This innovative technology presents significant advantages in scalability and stability, enabling customers to leverage quantum computing to address complex problems that traditional computers cannot effectively solve. Mesa Quantum's focus on quantum sensors and chip-scale technology positions it at the forefront of the rapidly evolving quantum computing landscape.

Gamebeast

Pre Seed Round in 2024
Gamebeast is a technology company that specializes in providing a low-code tool for game developers. Its platform is designed to enhance user-generated content (UGC) games, focusing on live engagement and monetization analytics. The company's tool automatically identifies player pain points and enables real-time updates, allowing developers to optimize in-game sales and promotions, thereby creating a more engaging and rewarding gaming experience.

Apex - Spacecraft Manufacturing

Series B in 2024
Apex is a manufacturer of commercial orbital transportation services spacecraft satellite buses that are designed to provide an approach to space. The company specializes in a combination of software, vertical integration, and hardware for spacecraft manufacture, allowing space enterprises to execute their missions by communicating with and launching vehicles using spacecraft.

Redcoat AI

Seed Round in 2024
Redcoat AI is a cybersecurity company focused on developing solutions to combat social engineering attacks, particularly those that target mobile devices. The company employs advanced generative AI to create systems that not only protect users from evolving threats but also simulate realistic attack scenarios to enhance awareness and vigilance among individuals and organizations. By combining mobile defense mechanisms with continuous training simulations, Redcoat AI aims to provide comprehensive security and authentication tools that facilitate effective verification processes. Its innovative approach addresses the dynamic nature of threats posed by bad actors, enabling users to stay ahead of potential security breaches.

Kusari

Seed Round in 2024
Kusari is a company focused on enhancing software supply chain security by providing solutions that ensure the integrity of the development process. Its mission is to promote transparency within the software supply chain while facilitating secure development practices. The company has developed a platform that prevents and responds to supply chain attacks, offering tools that establish security guardrails for builds and leverage metadata for deep visibility into security issues. This platform enables users to identify vulnerabilities, understand their potential impact, and effectively address their root causes, ultimately allowing clients to construct secure pipelines and maintain a resilient software supply chain. Additionally, Kusari engages with the developer community through its GitHub repositories, further supporting its commitment to software security.

Cinder Technologies

Venture Round in 2024
Cinder Technologies operates a unified intelligence and investigation platform designed to support decision-making in fraud and risk management. This platform enables technology companies to effectively track, investigate, and address critical issues within online communities. By integrating various relevant data sources and centralizing decision-making processes, Cinder empowers trust and safety teams to make faster and more accurate decisions regarding abusive content, fraud, and threats. The customizable workflows provided by the platform enhance the capabilities of investigative teams, facilitating more effective resolutions to pressing challenges faced by organizations in the digital landscape.

LightSource

Venture Round in 2024
LightSource develops a supply chain management platform to help professionals collaborate with their suppliers. It also allows collaborating with teammates on strategic sourcing projects, sending RFQs to suppliers and collecting quotes, and comparing bids using insights automatically extracted from the normal day-to-day work. The company was founded in 2021 and is headquartered in San Francisco, California.

Code Metal

Seed Round in 2023
Code Metal is a developer of an AI-powered automated development platform designed to facilitate the translation of high-level code into deployable, production-ready software. The company's innovative code chat platform aids developers by providing rapid responses to coding inquiries and suggesting subsequent lines of code based on the context of the repository. This functionality allows developers to streamline their coding process, ultimately enabling them to develop and launch applications more efficiently.

Aether Biomedical

Series A in 2023
Aether Biomedical is a medical robotics startup specializing in artificial intelligence-driven biomedical signal processing to develop rehabilitation robotics devices. The company has created Zeus, a multi-action bionic limb designed to offer a cost-effective and highly effective solution for upper limb amputees. This advanced prosthetic arm utilizes biosignal processing to provide a functional prosthesis that enables users to perform daily tasks with ease. Its unique design allows for individual control of the fingers, facilitating a proper grip that conforms to various objects' shapes. By integrating innovative medical technology, Aether Biomedical aims to enhance the quality of life for amputees.

Apex - Spacecraft Manufacturing

Series A in 2023
Apex is a manufacturer of commercial orbital transportation services spacecraft satellite buses that are designed to provide an approach to space. The company specializes in a combination of software, vertical integration, and hardware for spacecraft manufacture, allowing space enterprises to execute their missions by communicating with and launching vehicles using spacecraft.

Lumia Health

Seed Round in 2023
Lumia Health is a digital health company focused on enhancing the quality of life for individuals with cardiovascular and neurological diseases, particularly those experiencing orthostatic syndromes. The company develops sensor-enabled wearable products, including an in-ear device, that leverage artificial intelligence to analyze blood flow to the head. This technology allows for real-time monitoring and understanding of symptoms such as dizziness, brain fog, headaches, fainting, and fatigue that arise when standing. By providing patients with crucial health data at the right time, Lumia Health empowers them to proactively manage their conditions and prevent potential health crises.

SkyFi®

Seed Round in 2023
SkyFi® is an Earth intelligence platform that provides a seamless way to access and analyze diverse geospatial data, including satellite, aerial imagery, and more. Available on a web browser, mobile phone, and through an API, the SkyFi® enables users to gather intelligence from multiple data types to solve complex problems in industries like agriculture, urban planning, and environmental management.

Sealonix

Series A in 2023
Sealonix is a company dedicated to the development and commercialization of innovative hemostatic sealants utilizing proprietary biomaterials. It specializes in creating a sealant patch designed to achieve rapid hemostasis during surgical procedures, specifically targeting abdominopelvic and orthopedic operations. The PramStat patch is engineered to bioabsorb within one week of implantation, offering a timely solution for surgeons and enhancing patient safety and recovery.

Micron Biomedical

Series A in 2023
Micron Biomedical is a clinical-stage biopharmaceutical company founded in 2014 and based in Atlanta, Georgia. The company focuses on developing innovative microneedle patches designed for administering vaccines, specifically targeting influenza and polio. Its proprietary microneedle technology aims to enhance the protective and therapeutic effects of vaccines while improving patient compliance and simplifying the administration process. Through its advanced delivery methods, Micron Biomedical seeks to facilitate the development of vaccines that can address critical healthcare needs.

Nametag

Venture Round in 2023
Nametag is the first secure solution for self-service password and MFA resets. Learn more: getnametag.com.

Apex - Spacecraft Manufacturing

Seed Round in 2022
Apex is a manufacturer of commercial orbital transportation services spacecraft satellite buses that are designed to provide an approach to space. The company specializes in a combination of software, vertical integration, and hardware for spacecraft manufacture, allowing space enterprises to execute their missions by communicating with and launching vehicles using spacecraft.

Femtosense

Series A in 2022
Femtosense is a technology company specializing in the development of ultra-energy-efficient neural network models aimed at facilitating large-scale neural network processing at the edge. The company's innovative models leverage nonlinear dynamics and space-time sparsity, drawing inspiration from biological neural networks, to achieve high performance-per-joule on complex processing tasks. This technology enables businesses to implement user interfaces characterized by ultra-low latency and low power consumption, while also ensuring complete user privacy.

Aalyria

Series A in 2022
Aalyria, a spinout from Google, focuses on enhancing satellite communications, in-flight Wi-Fi, and other cellular connectivity solutions. The company specializes in developing advanced networking and laser communication technologies to provide hyper-fast, ultra-secure, and highly complex communications networks across various environments, including land, sea, air, near space, and deep space. Aalyria's technology supports all radio frequency bands and optical wavelengths, enabling clients to build resilient networks and optimize spectrum usage for greater profitability.

Acalvio

Series D in 2022
Acalvio is a cybersecurity company based in Silicon Valley, specializing in deception technology to protect against advanced security threats. Their flagship product, the ShadowPlex Cyber Deception Platform, leverages 25 issued patents in autonomous deception and advanced AI to offer solutions such as Identity Threat Detection and Response (ITDR), Advanced Threat Detection, OT Security, Zero Trust, Active Directory Protection, and Ransomware Protection. Acalvio's technology is designed to reduce the time attackers spend undetected within a network by enabling early threat detection and enhancing the efficiency of security operations centers through sophisticated investigation and active threat-hunting capabilities. The company serves Fortune 500 enterprises and government agencies, with deployment options including on-premises, cloud, and managed service providers.

Oura

Venture Round in 2022
Oura is a Finnish company that specializes in the development of a smart wellness ring designed to monitor and track various biometric data related to health and well-being. The ring incorporates advanced sensors to measure key metrics such as heart rate, sleep cycles, and activity levels, providing users with insights into their physiological and behavioral responses to sleep, rest, and recovery. This data is accessible through the accompanying Oura application, which enables users to understand their overall health status and make informed lifestyle choices. Oura operates within the health and wellness industry, focusing on enhancing the user's understanding of their body and promoting better health outcomes.

SkyFi®

Seed Round in 2022
SkyFi® is an Earth intelligence platform that provides a seamless way to access and analyze diverse geospatial data, including satellite, aerial imagery, and more. Available on a web browser, mobile phone, and through an API, the SkyFi® enables users to gather intelligence from multiple data types to solve complex problems in industries like agriculture, urban planning, and environmental management.

Phoenix Tailings

Venture Round in 2022
Phoenix Tailings Inc. is a company focused on producing primary metal products from mining tailings, with a commitment to sustainability and economic efficiency. Founded in 2019 and based in Woburn, Massachusetts, the company specializes in the recycling and re-mining of hazardous by-products, particularly Bauxite Residue, from the aluminum industry. By treating mining and refining waste as a new source of ore, Phoenix Tailings aims to extract strategic materials essential for various industries, including aerospace, defense, automotive, biotechnology, and more. The company's innovative approach not only facilitates the recovery of valuable metals but also addresses environmental concerns by reducing hazardous waste and providing carbon-free alternatives for metal sourcing.

Plato Systems

Venture Round in 2022
Plato Systems is a technology company based in San Mateo, California, specializing in digital transformation and industrial automation through its integrated Spatial Intelligence system. The company has developed a pioneering Tagless Activity Tracking platform that utilizes Deep Fusion perception technology to monitor and analyze activity patterns of individuals, equipment, and assets within industrial environments. By employing advanced radar technologies and machine learning methods, Plato Systems enhances operational efficiency and resource utilization for businesses, delivering decision-quality insights tailored to their specific objectives.

Tasso

Series B in 2021
Tasso, Inc., established in 2012 and based in Seattle, Washington, specializes in manufacturing clinical-grade, at-home blood sample collection devices. Their innovative product allows patients to conveniently and painlessly collect their own blood at home using a simple, push-button mechanism, and then mail the samples to a qualified lab for analysis. This approach aims to enhance accessibility and comfort in blood-based diagnostics, reducing the need for clinic visits.

Shift5

Series A in 2021
Shift5, Inc. is a cybersecurity company that specializes in developing products and systems designed to protect operational technology platforms, such as aircraft, spacecraft, ground combat vehicles, and construction machinery. Founded in 2019 and headquartered in Arlington, Virginia, Shift5 offers a range of hardware and software solutions, including its Shift5 Intake data recorder, which collects and transmits embedded data in real-time to detect intrusions. The company also provides Shift5 Engine, which employs rule-based and model-based analytics for identifying cyber attacks on internal communication networks, and Shift5 Gauge Cluster for data capturing and analytics. Additionally, Shift5 focuses on delivering intrusion detection and prevention capabilities, secure code delivery verification, and fault reporting across various standard and custom protocols, aiding both government and commercial clients in safeguarding critical infrastructure from cyber threats.

Primer

Series C in 2021
Primer Technologies, Inc., established in 2014 and headquartered in San Francisco, specializes in developing software that leverages machine learning and natural language processing to analyze vast amounts of textual data across multiple languages. Its platform automates the parsing and collation of documents, uncovering insights and generating reports comparable to those produced by human analysts. This enables governments and corporations to better understand and monitor global information, facilitating informed decision-making.

Paravision

Venture Round in 2021
Paravision is a San Francisco-based company that specializes in developing advanced face recognition software, primarily for security device manufacturers, solution providers, systems integrators, and financial services firms. Founded in 2013 and originally known as Ever AI until its rebranding in 2019, Paravision leverages deep learning to create industry-leading Vision AI solutions. The company's technology enhances security and user experience by offering capabilities such as age, gender, emotion, and ethnicity detection, facilitating personalized customer interactions and improved security measures. Paravision's commitment to innovation is evident in its high rankings in various NIST evaluations, where it has demonstrated exceptional performance in face recognition accuracy, security, and convenience across diverse identity-centric applications worldwide. With a focus on modular and scalable solutions, Paravision aims to set new standards in face recognition technology.

Ravn

Pre Seed Round in 2019
Ravn Inc. is an augmented reality company based in San Francisco, California, focused on enhancing decision-making in the defense sector. Founded in 2017, Ravn develops a platform that provides soldiers with real-time video feeds from autonomous drones, aircraft, and other sources, delivering critical battlefield intelligence. The company's software is designed to create and distribute actionable edge data, addressing the challenge of accessing reliable information in a field where data is often abundant but actionable insights are scarce. By enabling modern coordination for national security, Ravn aims to enhance the operational effectiveness of military personnel and decision-makers.
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