Investors / United States / J2 Ventures
J2 Ventures
Venture capital · Boston, MA, United States · North America
J2 Ventures is an early-stage investment firm that backs companies in advanced computing, biomedical engineering, cybersecurity, and infrastructure. Its team includes PhD scientists, combat veterans, practicing physicians, and entrepreneurs who work closely with founders on strategy.
Invests inAI & Machine LearningHealthcare & BiotechCybersecurity
In its own wordsadvanced computingbiomedical engineeringcybersecurityinfrastructureartificial intelligencespace
Your fit with J2 Ventures
Four questions about your startup
See how your round matches what it backs, point by point.
Or find every investor that fitsJ2 Ventures lists 37 checked portfolio companies on its own site and is named in 12 funding rounds, 6 of them as lead. Its most frequent entry is Seed, 73% of the companies with a known first round. Its largest themes are AI & Machine Learning (32%), Healthcare & Biotech (20%) and Cybersecurity (20%). 96% of its companies are based in United States. It invests most often alongside Coalition Capital, Accel and Fulcrum Venture Group.
Counts come from funding rounds that name J2 Ventures, complete from mid-2025: earlier rounds appear only when they were reported later. Round amounts and full round histories are on Fundup AI.
Round figures show recent activity, not J2 Ventures' whole history. Rounds on record name 11 companies; its own site lists 37. Funding rounds are complete from mid-2025, so counts and the yearly trend undercount a firm that invested before then. The portfolio, themes and places come from its own site and are not affected.
Entry stage
share of companies by the stage of its first roundShow as a table
| Value | |
|---|---|
| Pre-seed | 0% |
| Seed | 73% |
| Series A | 9% |
| Series B | 9% |
| Growth | 9% |
Activity by year
rounds it joined, last 10 yearsShow as a table
| Total | Rounds it led | |
|---|---|---|
| '17 | 0 | 0 |
| '18 | 0 | 0 |
| '19 | 0 | 0 |
| '20 | 0 | 0 |
| '21 | 0 | 0 |
| '22 | 0 | 0 |
| '23 | 0 | 0 |
| '24 | 0 | 0 |
| '25 | 4 | 3 |
| '26 | 8 | 3 |
Investor profile
percentile among all firmsShow as a table
| Measure | Percentile of all firms | Value |
|---|---|---|
| Portfolio size | 75th | 37 companies |
| Recent activity | 93th | 8 rounds in 12 months |
| Early stage | 81th | 73% of entries at pre-seed or seed |
| Evidence | 94th | 24% of companies confirmed by a round |
| Sector focus | 56th | 32% in its largest sector |
| Reach | 42th | 2 countries |
Investment themes
share of its checked companiesThis firmAll checked companies
Show as a table
| This firm | All checked companies | |
|---|---|---|
| AI & Machine Learning | 32% | 18% |
| Healthcare & Biotech | 20% | 15% |
| Cybersecurity | 20% | 4% |
| Industrial & Manufacturing | 7% | 7% |
| Enterprise Software | 5% | 8% |
| Human Resources | 3% | 1% |
| Fintech | 3% | 12% |
| Space & Defense | 3% | 3% |
Invests most often with
firms sharing its portfolio companiesShow as a table
| Share | |
|---|---|
| Coalition Capital | 5 |
| Accel | 3 |
| Fulcrum Venture Group | 3 |
| StartX | 3 |
| Alumni Ventures | 2 |
| Balerion Space Ventures | 2 |
| Glasswing Ventures | 2 |
| Mozilla Ventures | 2 |
Its portfolio companies
where they are based, and what their own sites showSite status
- Site answers37100%
- No longer answers00%
- Points to another company00%
- Parked or sold domain00%
A site that stops answering three checks in a row is counted as no longer answering; that is not proof of closure. A site that points to another company is often an acquisition.
Co-investor network
who it backs companies with, and who they back togetherAll co-investors or Compare portfolios with Coalition Capital
Compare J2 Ventures head to head
portfolio size, rounds, entry stages, themes and the companies both backThree or more firms at once: portfolio overlap.
Recent portfolio activity
when companies last raised with J2 Ventures| Date | Company | Stage |
|---|---|---|
| 24 Sept 2026 | Seed | |
| 18 Aug 2026 | Seed Led | |
| 22 Jul 2026 | Seed | |
| 7 Jul 2026 | Seed Led | |
| 17 Jun 2026 | Series C+ | |
| 9 Apr 2026 | Seed Led | |
| 23 Feb 2026 | Series B | |
| 19 Feb 2026 | Series B |
Round details for J2 Ventures
Amounts, full round histories and every co-investor in J2 Ventures' rounds are on Fundup AI. VCinfo covers investors and their portfolios.
Portfolio
37 companies checked against their own sites| Company | What it does | Themes | First round with it | Evidence |
|---|---|---|---|---|
| Aalyria orchestrates resilient, high-throughput networks across land, sea, air, and space, as they move. | AI & Machine LearningCybersecurity | Feb 2026Series B | Page + round | |
| Acalvio provides cyber deception technology for preemptive cybersecurity | Cybersecurity | Portfolio page | ||
| Aether Biomedical brings precision engineering and biosignal intelligence to prosthetic rehabilitation. | Healthcare & Biotech | Portfolio page | ||
| Apex Space manufactures and delivers satellite platforms to customers | AI & Machine LearningAI & Machine Learning | Portfolio page | ||
| Arkenstone provides infrastructure for federal contracting, compliance, HR, and contracting for technology companies, particularly those in the national security ecosystem. | Industrial & ManufacturingAI & Machine Learning | Jul 2026Seed | Page + round | |
| Cinder protects platforms from abuse, fraud, and manipulation using AI-powered trust and safety operations | AI & Machine LearningCybersecurity | Portfolio page | ||
| Code Metal automates software engineering workflows, including code translation, verification, and optimization for various hardware platforms. | AI & Machine LearningCybersecurity | Nov 2025Series A · 2 rounds | Page + round | |
| Druid Software is a cellular core network software company | Enterprise SoftwareHealthcare & Biotech | Portfolio page | ||
| Empress partners with discovery teams to guide molecule prioritization for drug discovery | Healthcare & Biotech | Portfolio page | ||
| Flashpass provides a workforce platform for trade schools to manage funding, curriculum, and job placement for their students | EducationHuman Resources | Apr 2026Seed | Page + round | |
| Gamebeast provides AI analytics and experiments for apps, websites, and games | GamingAI & Machine Learning | Portfolio page | ||
| Nametag provides identity verification and account protection solutions | FintechCybersecurity | Portfolio page | ||
| Holly provides AI-powered classification and compensation solutions for governments | AI & Machine LearningHuman Resources | Portfolio page | ||
| iCOUNTER is a managed platform that identifies live threats, determines what matters, and counters third-party threats before they strike you. | Cybersecurity | Portfolio page | ||
| InfiniG provides enterprise cellular coverage as a managed service to improve indoor mobile connectivity for businesses and organizations. | Enterprise SoftwareHealthcare & Biotech | Aug 2026Seed | Page + round | |
| Kusari provides software supply chain security for complex stacks | CybersecurityFintech | Portfolio page | ||
| Lightsource provides an AI-powered operating system for procurement of direct materials | Industrial & Manufacturing | Portfolio page | ||
| Lumia Health develops and sells smart earrings for tracking health and blood flow metrics | Healthcare & Biotech | Portfolio page | ||
| Mesa Quantum develops and manufactures chip-scale quantum sensors for positioning, navigation, timing, and other applications. | AI & Machine LearningAI & Machine Learning | Sept 2026Seed | Page + round | |
| Micron Biomedical develops FDA-regulated drugs that combine vaccines and therapeutics with microscopic structures called microarrays that dissolve painlessly and without needles in the upper layers of the skin. | Healthcare & Biotech | Portfolio page |
About this data
site last read 12 Nov 2026- Site
- j2vp.com
- Last read
- 12 Nov 2026
- Watching since
- 6 Nov 2026
- Rounds since
- 26 Feb 2025
- Companies checked
- 37
Rates come from what VCinfo has observed since observation_start. Firms tend to remove companies that closed, so early rates understate reality. A company leaving a portfolio page does not mean it closed or exited. An unreachable site means our checks failed, nothing more.
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