# Hiro Rio Maeda

> Hiro Rio Maeda is a seed investor at DNX Ventures (San Mateo) backing Cyber Security and Software. See 25 investments, check sizes, portfolio. Updated Aug 2026.

- Type: Angel Investor
- Fund: [DNX Ventures](https://shizune.co/investors/profile/dnx-ventures)
- Location: San Mateo, United States
- Total investments: 25
- Last investment: Nov 2025
- Lead investor: 32%
- Last updated: Aug 2026
- LinkedIn: https://www.linkedin.com/in/hiroriomaeda/

Hiro Rio Maeda is a Managing Partner at DNX Ventures. He was a Board Member at Remotium. He attended Keio University.

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Cyber Security | 8 | 32% |
| Software | 7 | 28% |
| Information Technology | 5 | 20% |
| Network Security | 4 | 16% |
| SaaS | 3 | 12% |

42 industries tracked in total.

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Seed | 7 | 28% |
| Series A | 6 | 24% |
| Series C | 6 | 24% |
| Series B | 3 | 12% |
| Debt Financing | 1 | 4% |

6 stages tracked in total.

### Country

| Country | Investments | Share |
| --- | --- | --- |
| United States | 17 | 68% |
| Israel | 1 | 4% |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| SOC Prime | SOC Prime operates the world's largest and most advanced platform for collaborative cyber defense following its mission to transform threat detection with the power of collective cybersecurity expertise. Relied upon by over 11,000 global organizations, SOC Prime supercharges cybersecurity operations enabling teams to hunt for threats anddefend against attacks easier, faster, and more efficiently than ever before. Founded in 2015 by security analysts and Detection Engineers, we have built the platform to help companies establish basic security practices, improve threat visibility, and advance automated incident response. Our technology helps enterprises, governments, MSSPs, and MDR providers overcome the challenges of the global talent shortage, threat complexity, alert fatigue, data quality, and cost-efficiency. SOC Prime Platform enables security teams to address the challenges of building advanced and threat-specific detections, organize and execute around strategic detection objectives, and manage the deployment of content at scale across a diverse range of security analytics tools. We serve Fortune-100 and Forbes Global 2000 enterprises, as well as government organizations by providing a platform for global collaboration, open-source technologies, and the highest level of support.SOC Prime helps customers centrally source and support detection content to maximize the value of their existing security investments. Powered by collaboration from a global cybersecurity community, our Detection as Code platform curates the most up-to-date Sigma rules and integrates with over 44 SIEM, EDR, and Data Lake platforms. Flexible subscriptions ensure that both organizations and individual operators can benefit from enhanced cyber defense capabilities. Threat Detection Marketplace, the world's leading and largest security analytics repository powered by SOC Prime Platform, delivers access to a constantly growing library of 500,000+ context-enriched detections aligned with the MITRE ATT&CK® framework and continuously updated. SOC Prime supports continuous content quality improvement backed by feedback from 11,000+ organizations, 55,000+ users, and 800 threat bounty members, who actively contribute their own detection content to the SOC Prime Platform while receiving recurring rewards for their input. Our team is diverse and distributed, comprising seasoned security experts with 20+ years of experience in the industry, creative designers, multilevel software developers, young and ambitious security researchers, analysts, and business leaders. We strongly believe that cybersecurity is one of the major challenges for humanity and can be improved by open source, knowledge sharing, and a performance-driven culture. |  | Venture - Series Unknown | Nov 04, 2025 |  |
| NetRise | NetRise is the software supply chain security company that exists to eliminate blind trust in software forever. By identifying every component in each binary image across firmware, kernels, operating systems, containers, and applications, NetRise exposes the full stack of inherited risk that source-based tools, vendor SBOMs, and questionnairescannot see. Non-code related risk uncovered includes hidden dependencies, cryptographic artifacts, misconfigurations, secrets, among others. Global enterprises that produce and consume software, including government agencies, rely on NetRise to validate what they ship and what they run. When unforeseen software vulnerabilities are exploited by bad actors, NetRise answers the question, “where am I exposed?” enabling rapid identification, prioritization, mitigation, and policy updates, reducing material risk to the business. | $11.4M | Series A | Apr 15, 2025 |  |
| Mitiga | Securing the Cloud is challenging and elusive. SaaS sprawl and expanding identity surfaces outpace traditional security tools. Preventive controls miss the mark on real-time detection. Visibility gaps grow. Attackers get in. Mitiga helps you fight back—faster. Our Cloud Detection and Response (CDR) platform accelerates response times by 90 percentand delivers full visibility across Identity, Cloud Infrastructure, SaaS and AI.Built by incident responders for incident responders, Mitiga is the only platform that connects all three layers—so you can detect threats earlier, contain lateral movement, and resolve incidents before they spread.With over 1,000 days of forensic log history and a powerful investigation workbench, Mitiga keeps your team ready to respond at any moment. No noise. No blind spots. No delay.Trusted by Fortune 500 enterprises. Easy to deploy. Designed for today’s cloud threats.Attacks will happen. What matters is how fast you bounce back. | $30M | Series B | Jan 21, 2025 |  |
| Mitiga | Securing the Cloud is challenging and elusive. SaaS sprawl and expanding identity surfaces outpace traditional security tools. Preventive controls miss the mark on real-time detection. Visibility gaps grow. Attackers get in. Mitiga helps you fight back—faster. Our Cloud Detection and Response (CDR) platform accelerates response times by 90 percentand delivers full visibility across Identity, Cloud Infrastructure, SaaS and AI.Built by incident responders for incident responders, Mitiga is the only platform that connects all three layers—so you can detect threats earlier, contain lateral movement, and resolve incidents before they spread.With over 1,000 days of forensic log history and a powerful investigation workbench, Mitiga keeps your team ready to respond at any moment. No noise. No blind spots. No delay.Trusted by Fortune 500 enterprises. Easy to deploy. Designed for today’s cloud threats.Attacks will happen. What matters is how fast you bounce back. | $13M | Series A | Mar 14, 2023 |  |
| Ghost Security | Durable Security Outcomes for Demanding Enterprises | $15M | Series A | Aug 04, 2022 |  |
| Ghost Security | Durable Security Outcomes for Demanding Enterprises | $15M | Seed | Aug 04, 2022 |  |
| SOC Prime | SOC Prime operates the world's largest and most advanced platform for collaborative cyber defense following its mission to transform threat detection with the power of collective cybersecurity expertise. Relied upon by over 11,000 global organizations, SOC Prime supercharges cybersecurity operations enabling teams to hunt for threats anddefend against attacks easier, faster, and more efficiently than ever before. Founded in 2015 by security analysts and Detection Engineers, we have built the platform to help companies establish basic security practices, improve threat visibility, and advance automated incident response. Our technology helps enterprises, governments, MSSPs, and MDR providers overcome the challenges of the global talent shortage, threat complexity, alert fatigue, data quality, and cost-efficiency. SOC Prime Platform enables security teams to address the challenges of building advanced and threat-specific detections, organize and execute around strategic detection objectives, and manage the deployment of content at scale across a diverse range of security analytics tools. We serve Fortune-100 and Forbes Global 2000 enterprises, as well as government organizations by providing a platform for global collaboration, open-source technologies, and the highest level of support.SOC Prime helps customers centrally source and support detection content to maximize the value of their existing security investments. Powered by collaboration from a global cybersecurity community, our Detection as Code platform curates the most up-to-date Sigma rules and integrates with over 44 SIEM, EDR, and Data Lake platforms. Flexible subscriptions ensure that both organizations and individual operators can benefit from enhanced cyber defense capabilities. Threat Detection Marketplace, the world's leading and largest security analytics repository powered by SOC Prime Platform, delivers access to a constantly growing library of 500,000+ context-enriched detections aligned with the MITRE ATT&CK® framework and continuously updated. SOC Prime supports continuous content quality improvement backed by feedback from 11,000+ organizations, 55,000+ users, and 800 threat bounty members, who actively contribute their own detection content to the SOC Prime Platform while receiving recurring rewards for their input. Our team is diverse and distributed, comprising seasoned security experts with 20+ years of experience in the industry, creative designers, multilevel software developers, young and ambitious security researchers, analysts, and business leaders. We strongly believe that cybersecurity is one of the major challenges for humanity and can be improved by open source, knowledge sharing, and a performance-driven culture. | $11M | Series A | Oct 19, 2021 |  |
| CloudNatix | CloudNatix is a provider of efficient infrastructure across multiple clouds and on-premise environments. It is revolutionizing how enterprises adopt and utilize Cloud and On-prem infrastructure. Its SaaS model ensures the software management is flexible and provides on-demand scalability and cost-saving benefits.The CloudNatix platform is builton top of core open-source software like Kuberenetes and Prometheus to work across all major cloud platforms with no vendor lock-in. The highly scalable microservice-based architecture ensures that the platform scales to a considerable number of customers running their infrastructure operations across multiple clouds. | $4.5M | Seed | Jan 21, 2021 |  |
| Mitiga | Securing the Cloud is challenging and elusive. SaaS sprawl and expanding identity surfaces outpace traditional security tools. Preventive controls miss the mark on real-time detection. Visibility gaps grow. Attackers get in. Mitiga helps you fight back—faster. Our Cloud Detection and Response (CDR) platform accelerates response times by 90 percentand delivers full visibility across Identity, Cloud Infrastructure, SaaS and AI.Built by incident responders for incident responders, Mitiga is the only platform that connects all three layers—so you can detect threats earlier, contain lateral movement, and resolve incidents before they spread.With over 1,000 days of forensic log history and a powerful investigation workbench, Mitiga keeps your team ready to respond at any moment. No noise. No blind spots. No delay.Trusted by Fortune 500 enterprises. Easy to deploy. Designed for today’s cloud threats.Attacks will happen. What matters is how fast you bounce back. | $7M | Seed | Jul 24, 2020 |  |
| SafeBreach | SafeBreach is a pioneer in the emerging category of breach and attack simulation. The company's groundbreaking platform provides a “hacker's view” of an enterprise’s security posture to proactively predict attacks, validate security controls and improve SOC analyst response. SafeBreach automatically executes breach methods with anextensive and growing Hacker’s Playbook of research and real-world investigative data. SafeBreach is funded by Sequoia Capital, Deutsche Telekom Capital, Hewlett Packard Pathfinder and investor Shlomo Kramer. | $19M | Series C | Apr 15, 2020 |  |

10 of 25 investments shown.

## Co-investors
- [ClearSky](https://shizune.co/investors/profile/clear-sky) — VC Fund, 4 deals together
- [468 Capital](https://shizune.co/investors/profile/468-capital) — VC Fund, 3 deals together
- [Atlantic Bridge](https://shizune.co/investors/profile/atlantic-bridge) — VC Fund, 3 deals together
- [Citi Ventures](https://shizune.co/investors/profile/citi-ventures) — VC Fund, 2 deals together
- [DFJ Growth](https://shizune.co/investors/profile/dfj-growth) — VC Fund, 2 deals together
- [DTCP](https://shizune.co/investors/profile/dtcp) — VC Fund, 2 deals together

## About DNX Ventures

VC Fund · San Mateo, United States

The hardest thing for early stage B2B Startups is to find the first customer who can validate your Product Market Fit and grow your business together. Since 2011, they have created more than 100 partnerships between startups and Fortune 500 companies by leveraging their CXO network with Global Conglomerates.

5 contacts available at DNX Ventures.

| Name | Title | Profile |
| --- | --- | --- |
| Eva Nahari | Principal | https://shizune.co/investors/profile/eva-nahari |
| Akira Kurabayashi | Managing Partner and Head of Japan | https://shizune.co/investors/profile/akira-kurabayashi |
| Hiro Rio Maeda | Managing Partner | https://shizune.co/investors/profile/hiro-rio-maeda |
| Kaishu Kadoya | Senior Finance Associate | https://shizune.co/investors/profile/kaishu-kadoya |
| Masahiko Inada | Venture Advisor | https://shizune.co/investors/profile/masahiko-inada |

## Similar investors

### Similar stage
- [Antler](https://shizune.co/investors/profile/antler-be9c) — VC Fund
- [Alumni Ventures](https://shizune.co/investors/profile/alumni-ventures-group) — VC Fund
- [Right Side Capital Management](https://shizune.co/investors/profile/right-side-capital-management) — VC Fund

## FAQ

### What does Hiro Rio Maeda invest in?

Hiro Rio Maeda invests primarily in Cyber Security, Software and Information Technology startups, most often at Seed and Series A stage. Most of the 25 investments tracked by Shizune back companies in United States. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### When did Hiro Rio Maeda last invest?

The most recent investment recorded for Hiro Rio Maeda closed in Nov 2025. Shizune tracks 25 investments in total for this profile, including round sizes, stages and portfolio companies, all sourced from confirmed public funding rounds and refreshed monthly.

### Is Shizune's investor data accurate?

Yes — every stat on this profile is calculated from confirmed public funding rounds monitored across hundreds of sources since 2020. This profile was last refreshed in Aug 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.

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