FJ Labs

FJ Labs, established in 2015 and headquartered in New York, is a stage-agnostic investment firm focusing on marketplaces and consumer-facing startups. It invests in seed and series A rounds, with a typical investment range of $50,000 to $5,000,000. The firm's portfolio includes notable companies such as Alibaba Group, Beepi, BrightRoll, Betterment, Adore Me, and Earnest, spanning sectors like e-commerce, fintech, and ad tech.

Matias Barbero

Venture Capital

Zineb Belghiti

Operations Associate

William Guillouard

Operating Partner

Arne Halleraker

Partner

Christopher Keshian

Investor

Ariel Lebowits

CFO

Jose Marin

Founding Partner

Güimar Vaca Sittic

Venture Partner

Jeff Weinstein

Partner

Past deals in Network Security

Strike

Series A in 2025
Strike is a cybersecurity firm focused on providing accessible and high-quality security solutions to enterprises of all sizes. The company specializes in Continuous Pentesting, which connects organizations with cybersecurity professionals to ensure ongoing security assessments rather than relying solely on periodic testing. This approach combines manual pentesting by skilled experts with automated scanning, allowing organizations to identify and address vulnerabilities in real-time. By integrating with clients' management and communication systems, Strike enhances the efficiency of vulnerability triaging and remediation, helping businesses safeguard their data against potential threats before they can be exploited.

Somos Internet

Series A in 2025
Somos Internet is a network and telecommunications startup that provides latest generation internet with a fast, secure, stable connection. The company was founded in 2018 and is headquartered in Medellín, Antioquia, Colombia.

Somos Internet

Seed Round in 2024
Somos Internet is a network and telecommunications startup that provides latest generation internet with a fast, secure, stable connection. The company was founded in 2018 and is headquartered in Medellín, Antioquia, Colombia.

Calimero Network

Seed Round in 2023
Calimero Network is a blockchain infrastructure company founded in 2022 and headquartered in London. It specializes in developing a private blockchain network platform that allows clients to deploy and scale innovative solutions while prioritizing privacy. The platform offers fully interoperable cross-contract calls, enabling businesses to manage public assets and bridge various fungible and non-fungible tokens. Additionally, it facilitates secure data storage and sharing through encrypted channels, allowing interactions with private shards. By focusing on user privacy and data control, Calimero Network aims to provide businesses with a robust solution for their blockchain needs.

Calimero Network

Pre Seed Round in 2022
Calimero Network is a blockchain infrastructure company founded in 2022 and headquartered in London. It specializes in developing a private blockchain network platform that allows clients to deploy and scale innovative solutions while prioritizing privacy. The platform offers fully interoperable cross-contract calls, enabling businesses to manage public assets and bridge various fungible and non-fungible tokens. Additionally, it facilitates secure data storage and sharing through encrypted channels, allowing interactions with private shards. By focusing on user privacy and data control, Calimero Network aims to provide businesses with a robust solution for their blockchain needs.

Strike

Seed Round in 2022
Strike is a cybersecurity firm focused on providing accessible and high-quality security solutions to enterprises of all sizes. The company specializes in Continuous Pentesting, which connects organizations with cybersecurity professionals to ensure ongoing security assessments rather than relying solely on periodic testing. This approach combines manual pentesting by skilled experts with automated scanning, allowing organizations to identify and address vulnerabilities in real-time. By integrating with clients' management and communication systems, Strike enhances the efficiency of vulnerability triaging and remediation, helping businesses safeguard their data against potential threats before they can be exploited.

KZen Networks

Series A in 2021
KZen Networks is a technology company based in Tel Aviv, Israel, specializing in the development of a non-custodial digital currency wallet. Incorporated in 2018, KZen Networks combines advanced cryptography with a strong emphasis on security, user interface, and user experience to create a reliable platform for digital asset management. The company's innovative approach to blockchain technology reflects its commitment to providing secure solutions for cryptocurrency users, leveraging expertise in both cutting-edge technology and consumer product marketing.

KZen Networks

Pre Seed Round in 2019
KZen Networks is a technology company based in Tel Aviv, Israel, specializing in the development of a non-custodial digital currency wallet. Incorporated in 2018, KZen Networks combines advanced cryptography with a strong emphasis on security, user interface, and user experience to create a reliable platform for digital asset management. The company's innovative approach to blockchain technology reflects its commitment to providing secure solutions for cryptocurrency users, leveraging expertise in both cutting-edge technology and consumer product marketing.

ZenGo

Seed Round in 2018
ZenGo is a developer of a non-custodial cryptocurrency wallet that aims to enhance accessibility within the global crypto economy. The company utilizes advanced multiparty computation (MPC) cryptography to ensure security by default, boasting over one million customers and a record of zero hacks. ZenGo's digital wallets enable users to buy and sell cryptocurrencies while efficiently generating and managing private keys. This innovative approach addresses issues related to security breaches and human error, allowing cryptocurrency traders and investors to manage their digital assets and investment portfolios conveniently and securely.
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