# Dug Song

> Dug Song is a seed investor at Michigan Founders Fund (Ann Arbor) backing Software and SaaS. See 15 investments, check sizes, portfolio. Updated Aug 2026.

- Type: Angel Investor
- Fund: [Michigan Founders Fund](https://shizune.co/investors/profile/michigan-founders-fund)
- Location: Ann Arbor, United States
- Total investments: 15
- Last investment: May 2025
- Lead investor: 0%
- Last updated: Aug 2026
- LinkedIn: http://www.linkedin.com/in/dugsong
- X (Twitter): http://twitter.com/dugsong
- Website: https://x.com/dugsong

Dug Song is a seed investor at Michigan Founders Fund in Ann Arbor focused on Software and SaaS. Dug Song is Co-founder and General Manager of Duo Security, one of the fastest-growing cybersecurity providers in the world. In 2018, Duo was acquired by Cisco for $2.35 billion, making it the largest exit ever for a Michigan-based software company.Founded in 2010, Duo protects more than 15,000 organizations against data breach with its simpleand easy two-factor authentication and Zero Trust security products.Dug has a history of leading successful products and companies to solve pressing security problems, and is a renowned hacker and leading voice in the information security industry. Prior to launching Duo, Dug spent seven years as founding Chief Security Architect at Arbor Networks, protecting 80 percent of the world’s Internet service providers. He also built the first commercial network anomaly detection system, acquired by Check Point Software Technologies.

## Round sizes

| Stage | Round size |
| --- | --- |
| Seed | $1.2M–$5M |
| Pre-Seed | $455k–$2.1M |
| Series A | $15M–$29M |

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Software | 4 | 27% |
| SaaS | 2 | 13% |
| Training | 2 | 13% |
| Logistics | 2 | 13% |
| Marketplace | 2 | 13% |

37 industries tracked in total.

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Seed | 8 | 53% |
| Pre-Seed | 4 | 27% |
| Series A | 2 | 13% |

### Country

| Country | Investments | Share |
| --- | --- | --- |
| United States | 12 | 80% |
| Russian Federation | 1 | 7% |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| Church Space | ChurchSpace is a technology startup that operates a digital marketplace connecting users with underutilized church properties for various events and activities. Through its platform, individuals and organizations can browse and book local church spaces for purposes such as weddings, conferences, community gatherings, and business functions. Thecompany aims to assist churches in monetizing their available real estate by transforming these spaces into venues for events, worship, and kitchen use. | $1.2M | Seed | May 05, 2025 |  |
| Bloom | Bloom is an operations-as-a-service platform designed for hardware innovators. By connecting product companies with trusted manufacturers, logistics partners, and service providers, Bloom streamlines production, assembly, and after-sales support. Whether in mobility, robotics, clean energy, or emerging tech, Bloom helps brands bring their ideas tomarket faster and more efficiently. | $2.1M | Pre-Seed | Apr 01, 2025 |  |
| CircNova | CircNova is a biotechnology company that utilizes AI to generate, analyze, and identify circular RNA for therapeutic development. | $3.3M | Seed | Feb 21, 2025 |  |
| Carvis.AI | Get instant, accurate diagnostics, easy-to-follow repair guides, essential tool lists, recommended parts, and helpful YouTube tutorials, all in one place. | $1.2M | Pre-Seed | Nov 04, 2024 |  |
| Folio.works | Each of us will spend about 30% of our lives at work. Folio prepares young adults to thrive in meaningful careers by helping them gain real-world experience. Our platform facilitates internships, part time jobs, and open-source challenge projects.We partner with universities and governments to facilitate coop programs, for-credit internships, andworkforce training dollars to make internships ubiquitous. In turn, we’re building the most effective dataset on entry-level talent to power the future of hiring. | $4M | Seed | Aug 01, 2024 |  |
| Reportwell | Reportwell streamlines key compliance tasks and reporting requirements for authorizers, school districts, and government agencies that want stronger reporting, easier accountability, and simpler compliance for the schools or companies under their regulatory umbrella. | $1.1M | Pre-Seed | Jan 01, 2024 |  |
| Tideway Logistics | Tideway Logistics is a next-generation, AI-powered 3PL that leverages advanced software and automation to drive down fulfillment costs and streamline every link of your supply chain. Our mission is clear: provide merchants with cutting edge technology to automate your supply chain and provide the best customer experience—so you can focus on whatmatters most: growing your business. |  | Seed | Jan 01, 2024 |  |
| Culturewell | Cleanliness Analytics - helping healthcare systems prevent infections in their facilities | $1.4M | Seed | Nov 03, 2023 |  |
| SpecterOps | SpecterOps is a cybersecurity company that provides products, services, and training solutions to help enterprises defend against advanced attacks. They assist companies in shutting down attack vectors, evaluating and developing security operations programs, providing advanced adversary Tactics, Techniques, and Procedures (TTPs) training tostudents, and sponsoring several initiatives that benefit the industry as a whole. | $28.7M | Series A | Apr 18, 2023 |  |
| Push Security | Push Security is the secure enterprise browser extension for the AI era. Founded by red team and blue team experts, Push combines high-fidelity browser telemetry, real-time control, and autonomous agents to stop advanced attacks, secure AI usage, harden identities, and prevent data loss — all from your users’ existing browsers, no migrationrequired. | $15M | Series A | Mar 28, 2023 |  |

10 of 15 investments shown.

## Co-investors
- [Michigan Rise](https://shizune.co/investors/profile/michigan-rise) — VC Fund, 8 deals together
- [Everywhere Ventures](https://shizune.co/investors/profile/everywhere-ventures) — VC Fund, 4 deals together
- [Decibel Partners](https://shizune.co/investors/profile/decibel-vc) — VC Fund, 2 deals together
- [Detroit Venture Partners](https://shizune.co/investors/profile/detroit-venture-partners) — VC Fund, 2 deals together
- [Google Ventures](https://shizune.co/investors/profile/google-ventures) — VC Fund, 2 deals together
- [Index Ventures](https://shizune.co/investors/profile/index-ventures) — VC Fund, 2 deals together

## About Michigan Founders Fund

VC Fund · Ann Arbor, United States

Michigan Founders Fund is a nonprofit organization that offers funding solutions for community development.

1 contacts available at Michigan Founders Fund.

| Name | Title | Profile |
| --- | --- | --- |
| Dug Song | Co-Founder & Chair | https://shizune.co/investors/profile/dug-song |

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## FAQ

### What does Dug Song invest in?

Dug Song invests primarily in Software, SaaS and Training startups, most often at Seed and Pre-Seed stage. Most of the 15 investments tracked by Shizune back companies in United States. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### What is Dug Song's check size?

Dug Song typically joins rounds of $1.2M–$5M at Seed, $455k–$2.1M at Pre-Seed and $15M–$29M at Series A. These ranges are 10th–90th percentile round sizes calculated from confirmed public funding rounds, so they are a realistic guide to the rounds Dug Song participates in.

### When did Dug Song last invest?

The most recent investment recorded for Dug Song closed in May 2025. Shizune tracks 15 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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