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

Investor

Zineb Belghiti

Operations Associate

Fabrice Grinda

Co-Founder

William Guillouard

Venture Partner

Arne Halleraker

Principal

Christopher Keshian

Investor

Ariel Lebowits

CFO

Jose Marin

Co-Founder

Güimar Vaca Sittic

Venture Partner

Jeff Weinstein

Principal

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 established in 2022 and based in London. It specializes in providing a private blockchain network platform that enables clients to control their data securely. The platform is designed with privacy as a priority, offering features such as fully interoperable cross-contract calls and the ability to manage public assets. Additionally, it supports the bridging of fungible tokens (FTs) and non-fungible tokens (NFTs), while facilitating encrypted interactions with private shards. This comprehensive approach allows businesses to store, share, and protect their data effectively, ensuring user privacy throughout.

Calimero Network

Pre Seed Round in 2022
Calimero Network is a blockchain infrastructure company established in 2022 and based in London. It specializes in providing a private blockchain network platform that enables clients to control their data securely. The platform is designed with privacy as a priority, offering features such as fully interoperable cross-contract calls and the ability to manage public assets. Additionally, it supports the bridging of fungible tokens (FTs) and non-fungible tokens (NFTs), while facilitating encrypted interactions with private shards. This comprehensive approach allows businesses to store, share, and protect their data effectively, ensuring user privacy throughout.

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.
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