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The Venture Codex

J2 Ventures

24 School Street, 2nd Floor, Boston, Massachusetts, 02108, United States

Overview

J2 Ventures operates as a venture capital firm. J2 Ventures is focused on leading-edge technology with dual-use applications to national security and the commercial sector

Total investments
29
Lead investments
16
Investments · 12mo
12
Active investors
5
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Investment portfolio

  • InfiniG

    Led · Seed · Aug 2026

    InfiniG provides Mobile Coverage as a Service (MCaaS), a fully managed neutral-host platform that uses shared CBRS spectrum and multi-operator (MOCN) technology to deliver carrier-grade cellular coverage for enterprises. Its platform standardizes design, installation, operator onboarding, macro-network and 911/PSAP integration, activation, analytics, and 24/7/365 operations. InfiniG offers InfiniG Insights for visibility into availability, call performance, mobility, traffic, and utilization across properties and portfolios. The system is cloud-managed and upgradeable to 5G, with a stated roadmap toward enterprise-prioritized and private networks, automation, and physical AI. The company has spent three years deploying MCaaS with large enterprises across sectors including healthcare, retail, manufacturing, hospitality, education, and critical infrastructure, and its founders draw on experience deploying multi-operator enterprise cellular at Meta. In August 2026 InfiniG raised a $5.2 million Seed round co-led by J2 Ventures and Stormbreaker Ventures to fund deployments, operator automation, analytics, and partner expansion.

  • Inner Logic

    Participated · Seed · Jul 2026

    Inner Logic develops a simulation and data platform that allows device manufacturers to design, test, and validate procedural devices across thousands of virtual patients grounded in real clinical and procedural data. The company’s infrastructure aims to shift exploratory device development from physical prototypes and cadaver labs into in silico testing to accelerate iteration and broaden patient coverage. Founders include CEO Tito Porras, MD; CTO Mathias Unberath, PhD; and Chief Robotics Officer Axel Krieger, PhD, who collectively have authored over 400 peer-reviewed publications and are named inventors on more than 40 patents. Inner Logic has demonstrated its technology by training AI in simulation for orthopedic trauma and deploying it successfully on real hardware and patient anatomy, and by completing key steps of an autonomous gallbladder removal in a live animal model. The company is positioning its platform to support the development and validation of intelligent and autonomous procedural systems as they move toward clinical deployment. The announced financial position includes an $11.5 million seed round to advance product development and scaling.

  • Arkenstone Defense

    Led · Seed · Jul 2026

    Arkenstone Defense provides a managed operating system that packages government contracting requirements—cleared workforce, payroll and benefits, personnel and facility security, compliance, and accreditation—into a single service for commercial technology companies. The platform is anchored by a Professional Employer Organization (PEO) that legally employs cleared workers and carries the layered functions companies need to win and deliver federal contracts. Arkenstone launched from stealth and is led by co-founder and CEO Peter Dixon and co-founder and COO William Treseder. The company reported that more than two dozen defense technology firms already use its platform. Arkenstone positions itself to reduce the operational lead time and cost of certifications like CMMC Level 2 and other accreditation lifecycles that previously forced startups to build separate government back offices. It is headquartered in Menlo Park, California, with additional offices in Albuquerque, New Mexico and Burr Ridge, Illinois.

  • Sazabi

    Led · Seed · Jun 2026

    Sazabi builds an AI-native observability platform centered on chat, autonomous agents, and a logs-first approach that treats logs as the single source of truth for understanding production systems. The company aims to replace complex telemetry stacks and traditional dashboards by using AI to reconstruct views engineers need from log data and to proactively detect, investigate, and resolve issues. In a closed alpha it onboarded 50 teams in two weeks, ran 8,000 background investigations, detected 2,000 issues, and opened 200 pull requests against customer repositories. Sazabi says customers can onboard quickly — one cited customer reported a 15-minute onboarding and immediate useful alerts — and the product is being adopted by AI-native engineering teams. The company was founded in 2025 and is based in San Francisco. Following the seed raise, Sazabi plans to expand its engineering team, accelerate product development, and deepen integrations across cloud and developer platforms.

  • Principal Mineral

    Participated · Equity · Jun 2026

    Principal Mineral, based in Dallas, TX, positions itself as a leader in rebuilding the industrial 'missing midstream' for strategic materials. In June 2026 it completed the acquisition of Isola Group, a manufacturer of copper-clad laminates and dielectric prepregs used in printed circuit boards. The company has secured approximately $280 million of new funding plus a credit facility to support integration of the combined businesses. Principal Mineral plans to expand advanced manufacturing capacity and continue technology development. It intends to invest long-term in critical supply-chain capabilities across North America, Europe, and Asia. The fresh capital and debt facility underpin the company's near-term growth and integration strategy.

Team