# Ellen Chisa

> Ellen Chisa is a seed investor at boldstart ventures backing Health Care and Internet. See 5 investments, check sizes, portfolio. Updated Aug 2026.

- Type: Angel Investor
- Fund: [boldstart ventures](https://shizune.co/investors/profile/boldstart-ventures)
- Location: San Francisco, United States
- Total investments: 5
- Last investment: Jan 2026
- Lead investor: 80%
- Last updated: Aug 2026
- LinkedIn: https://www.linkedin.com/in/ellenchisa/
- X (Twitter): https://twitter.com/ellenchisa
- Website: https://www.ellenchisa.com/

Ellen Chisa is a seed investor at boldstart ventures in San Francisco focused on Health Care and Internet. Ellen Chisa is the Partner at Boldstart Ventures and Co-Founder of Dark. She is a former CEO of Dark. She attended Olin College.

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Health Care | 2 | 40% |
| Internet | 1 | 20% |
| Software | 1 | 20% |

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Seed | 4 | 80% |
| Series A | 1 | 20% |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| Topos Bio | Topos Bio is an AI-powered biotechnology company developing therapies for intrinsically disordered proteins (IDPs). The company’s platform integrates physics with generative AI to target proteins involved in neurodegeneration, oncology, and metabolic diseases. | $10.5M | Seed | Jan 08, 2026 |  |
| Zuplo | Programmable API management for developers. Simpler, better alternative to Apigee and Kong | $9M | Seed | Nov 08, 2023 |  |
| Stellate | Peace of mind for your GraphQL API. Reduce your origin traffic by up to 95% with our GraphQL edge cache and never worry about scaling again.Our GraphQL edge cache serves cached query results to your users all around the world in milliseconds. If a mutation changes some data, the smart purging automatically invalidates any cached query thatcontains that data.Scaling, inspecting and securing GraphQL APIs has always been a struggle in projects we worked on. As much as we love GraphQL for allowing us to ship good products very quickly, no traditional CDN can cache GraphQL APIs. We had to build custom caching solutions from scratch, which distracted us for weeks and the caches never worked as well as we needed them to. | $5M | Seed | Jun 06, 2022 |  |
| Liveblocks | Build amazing real-time collaborative products in minutes | $5M | Seed | Mar 16, 2022 |  |
| HumanFirst | HumanFirst accelerates the adoption of patient-centered clinical trials using precision digital measures (e.g., digital biomarkers and eCOA).At HumanFirst, we offer a precision measures platform - the world’s largest AI-powered SaaS platform trusted to improve human outcomes. We provide insights, intelligence, and accuracy with validated evidencedata to precisely guide and accelerate human-centric drug development. Twenty-two of the 25 largest pharmaceutical companies in the world have used the HumanFirst platform to evaluate and enable the deployment of digital health technologies (DHTs). | $12M | Series A | May 31, 2021 |  |

5 of 5 investments shown.

## Co-investors
- [Threshold](https://shizune.co/investors/profile/threshold) — VC Fund, 2 deals together
- [Trilogy Equity Partners](https://shizune.co/investors/profile/trilogy-equity-partnership) — VC Fund, 2 deals together
- [Arkitekt Ventures](https://shizune.co/investors/profile/arkitekt-ventures) — VC Fund, 1 deal together
- [Atlassian](https://shizune.co/investors/profile/atlassian) — VC Fund, 1 deal together
- [Banana Capital](https://shizune.co/investors/profile/banana-capital) — VC Fund, 1 deal together
- [Boost VC](https://shizune.co/investors/profile/boostfunder) — VC Fund, 1 deal together

## About boldstart ventures

VC Fund · New York, United States

Before you build your team, before you write your first line of code, before you even take your first check—that’s when boldstart gets to work. We collaborate with technical founders well before company creation, lead pre-product rounds at inception, and rally our developer-first and SaaS network to help turn bold ideas into category-creatingiconic companies.We’ve been in the trenches with Snyk, Blockdaemon, Kustomer, BigID, Superhuman (and so many more) from day one.The investment firm was founded in 2010 by Ed Sim and is headquartered in New York, New York, United States.

5 contacts available at boldstart ventures.

| Name | Title | Profile |
| --- | --- | --- |
| Ab Gupta | Operating Partner | https://shizune.co/investors/profile/ab-gupta |
| Charlotte Chapanoff | General Manager | https://shizune.co/investors/profile/charlotte-chapanoff |
| Ed Sim | Founder & Managing Partner | https://shizune.co/investors/profile/ed-sim |
| Eliot Durbin | General Partner | https://shizune.co/investors/profile/eliot-durbin |
| Ellen Chisa | Partner | https://shizune.co/investors/profile/ellen-chisa |

## 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 Ellen Chisa invest in?

Ellen Chisa invests primarily in Health Care, Internet and Software startups, most often at Seed and Series A stage. Most of the 5 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 Ellen Chisa last invest?

The most recent investment recorded for Ellen Chisa closed in Jan 2026. Shizune tracks 5 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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