# Define Ventures

> Define Ventures is a VC fund in San Francisco backing Health Care and Medical. See 59 investments, check sizes, portfolio and contact details. Updated Aug 2026.

- Type: VC Fund
- Location: San Francisco, United States
- Total investments: 59
- Last investment: May 2026
- Lead investor: 31%
- Fund size: $460M
- Last fund: Apr 2023
- Last updated: Aug 2026
- LinkedIn: https://www.linkedin.com/company/definevc/
- X (Twitter): https://twitter.com/definevc
- Website: https://definevc.com/

Define Ventures is an early-stage venture capital firm solely focused on investing in digital health companies. They partner with entrepreneurs with the digital health focus and expertise that they deserve to redefine healthcare.

## Contacts

5 contacts available for Define Ventures. Shizune tracks 10 team members at Define Ventures. Sign up free to unlock them: https://app.shizune.co/sign-up/investor-profiles/find-team-emails/define-ventures?utm_source=investor_profile

## Round sizes

| Stage | Round size |
| --- | --- |
| Seed | $3.4M–$8M |
| Series A | $9.5M–$35M |
| Series B | $15M–$140M |

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Health Care | 23 | 39% |
| Medical | 12 | 20% |
| Wellness | 9 | 15% |
| Information Technology | 6 | 10% |
| Fitness | 4 | 7% |

28 industries tracked in total.

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Series A | 15 | 25% |
| Series B | 15 | 25% |
| Seed | 10 | 17% |
| Series C | 4 | 7% |
| Series D | 1 | 2% |

6 stages tracked in total.

### Country

| Country | Investments | Share |
| --- | --- | --- |
| United States | 22 | 37% |
| United Kingdom | 1 | 2% |

## Team

| Name | Title | Investments | Profile |
| --- | --- | --- | --- |
| Chirag Shah | Partner | 4 | https://shizune.co/investors/profile/chirag-shah-ce21 |
| Chuka Esiobu | Senior Associate and Investor | 0 | https://shizune.co/investors/profile/chuka-esiobu-aa06 |
| Garrett Howard | Senior Associate and Investor | 0 | https://shizune.co/investors/profile/garrett-howard |
| Hong Truong | Principal | 0 | https://shizune.co/investors/profile/hong-truong |
| Agneta Breitenstein | venture partner | 2 | https://shizune.co/investors/profile/a-g--breitenstein |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| Blank Bio | Blank Bio develops a computational toolkit for RNA therapeutics that applies foundation models. | $7.2M | Seed | May 19, 2026 |  |
| 9amHealth | 9amHealth is a virtual healthcare company focused on managing chronic cardiometabolic conditions such as diabetes, obesity, high blood pressure, and high cholesterol. The platform connects patients with licensed healthcare providers, pharmacists, nutritionists, prescription delivery services, and at-home laboratory testing through a digital caremodel. Its services include personalized treatment plans, medication management, ongoing monitoring, and remote consultations designed to support long-term condition management. The company also works with employers, health plans, and pharmacy benefit managers to provide healthcare support programs for individuals living with chronic illnesses. 9am.health’s care approach combines medical treatment, behavioral support, and digital tools to help patients access healthcare services remotely and manage their conditions more consistently. | $26M | Series B | May 12, 2026 |  |
| Luminai | Luminai automates internal workflows by taking any multi-click process and making it one click. | $38M | Series B | Apr 09, 2026 |  |
| Valius Sciences | Valius Sciences offers maximalist oncology diagnostics for personalized cancer treatment. | $10M | Seed | Apr 09, 2026 |  |
| Hyro | Hyro creates plug-and-play conversational AI assistants by seamlessly ingesting data on digital channels to allow users to interact with information via voice or chat simply and intuitively, allowing for increased engagement and conversions. Unlike existing solutions, Hyro provides organisations with frictionless deployment and maintenanceprocesses by automatically building a knowledge graph out of their existing content without any integration, playbooks, or training data. | $45M |  | Oct 21, 2025 |  |
| Foundation Health | Foundation Health is a telehealth and nationwide pharmacies and diagnostic distribution centre | $20M | Series A | Oct 09, 2025 |  |
| Cohere Health | Cohere Health is a healthcare technology company, focused on improving the efficiency and effectiveness of healthcare delivery. Cohere Health aims to simplify the complexities of the healthcare system by leveraging technology to streamline processes, enhance communication, and ultimately improve patient outcomes. The company may provide solutionsto various stakeholders in the healthcare ecosystem, including patients, providers, and payers. | $90M | Series C | May 14, 2025 |  |
| Layer Health | Layer Health focuses on resolving the healthcare information problem by utilizing artificial intelligence to execute any clinical, administrative, or research work that involves chart review from unstructured data. | $29.5M | Series A | Mar 27, 2025 |  |
| Marit Health | Marit Health is a platform and community for clinicians to thrive in their careers | $3.2M | Seed | Mar 27, 2025 |  |
| Evermore | Soda Health is a healthcare technology company focused on building solutions that eliminate health inequities and create a healthier America. | $54.2M | Series B | Dec 03, 2024 |  |

10 of 59 investments shown.

## Co-investors
- [General Catalyst](https://shizune.co/investors/profile/general-catalyst-partners) — VC Fund, 7 deals together
- [Flare Capital Partners](https://shizune.co/investors/profile/flare-capitalpartners) — VC Fund, 6 deals together
- [Lightspeed Venture Partners](https://shizune.co/investors/profile/lightspeed-venture-partners) — VC Fund, 6 deals together
- [Avidity Partners](https://shizune.co/investors/profile/avidity-partners) — VC Fund, 5 deals together
- [B Capital](https://shizune.co/investors/profile/b-capital-group) — VC Fund, 5 deals together
- [Coatue](https://shizune.co/investors/profile/coatue) — VC Fund, 5 deals together

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## FAQ

### What does Define Ventures invest in?

Define Ventures invests primarily in Health Care, Medical and Wellness startups, most often at Series A and Series B stage. Most of the 59 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 Define Ventures's check size?

Define Ventures typically joins rounds of $3.4M–$8M at Seed, $9.5M–$35M at Series A and $15M–$140M at Series B. These ranges are 10th–90th percentile round sizes calculated from confirmed public funding rounds, so they are a realistic guide to the rounds Define Ventures participates in.

### How do I contact Define Ventures?

Public channels for Define Ventures include LinkedIn, X (Twitter) and the website linked on this profile. For a verified work email and phone number, create a free Shizune account — contact data is searched across 20+ sources and validated before delivery, so your outreach lands in the right inbox.

### Who are the partners at Define Ventures?

The team at Define Ventures includes Chirag Shah (Partner), Chuka Esiobu (Senior Associate and Investor) and Garrett Howard (Senior Associate and Investor), among 10 team members tracked by Shizune. The Team section lists each member with their title, investment count and links.

### 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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