David Ko
Angel Investor
San Francisco, United States
David Ko is a seed investor in San Francisco focused on Internet and Software. David Ko is the Co-founder and CEO of Ripple Health Group (RHG), an early stage healthtech startup focused on helping people experience healthier lives by connecting them to the care, support, and community they need. Prior to RHG, David was the President, COO and Board Member of Rally Health, a digital health company that develops online andmobile solutions that make it easy for consumers to take charge of their health and health care. Rally’s solutions are currently available to nearly 55 million people through health plans, care providers, and more than 200,000 employers.Prior to joining Rally, David oversaw all strategy, planning and operations as COO at Zynga, which he helped take public in December 2011. At the time of its IPO, Zynga was the largest social gaming company in the world with over 100 million daily active users. Prior to his work at Zynga, he spent 10 years at Yahoo! in various senior executive roles, including SVP of Yahoo!’s audience, mobile, and local businesses.David serves on the board of overseers at his alma mater New York University Stern School of Business where in 2016 he established the NYU Stern Venture Fellows program for aspiring entrepreneurs. He also works as an advisor and investor to a number of companies in Silicon Valley including Calm, the number one app for Sleep, Meditation and Relaxation.
- Total investments:
- 12
- Last investment:
- Lead investor:
- 0%
Last updated:
For AI agents: llms.txt
Industries David Ko invests in
Stages David Ko invests in
Countries David Ko invests in
Round sizes
Contacts
| Type | Contact | Validation |
|---|---|---|
| Work email | ||
| Personal email | ||
| Work phone | ||
| Personal phone | ||
| Socials |
Round size
- Seed
- $1.2M–$10M
Investment Focus
Industry
- Internet 2 (17%)
- Software 2 (17%)
- Virtual Workforce 2 (17%)
- Information Technology 2 (17%)
- Artificial Intelligence 2 (17%)
Country
- United States 7 (58%)
- Singapore 1 (8%)
Investments
| Company | Description | Round | Links |
|---|---|---|---|
| Noble Mobile is a telecommunication company that offers wireless network and data plan services. | $10.4M / Seed / Sep 16, 2025 | ||
| Today, while platforms like Snowflake/GCP/AWS unlock insights and exploration, the volume of pipelines, the complexity of infrastructure, and the increasing cost of computing are overwhelming data teams. Single Origin helps data-driven organizations boost team productivity while realizing cloud cost savings. Our unique query optimizationplatform, operating between data warehouse and data tools/applications, automatically analyzes all of an organization's queries; identifies expensive and inefficient ones; then optimizes queries to be 10X simpler, faster and cheaper. We are the team that built and scaled uMetric at Uber, as well as other data infrastructure tools across snap, Reddit, Amazon, and Microsoft. More at https://docs.singleorigin.tech/ | $3.7M / Seed / Mar 03, 2022 | ||
| Voltaku produces live stories that transcend a single media, transporting fans in real-time from mobile to the Metaverse. Voltaku content is deeply embedded in the worlds of anime, manga, and gaming, offering a new level of epic worldbuilding and character-driven storylines to the expanding otaku market. | $1.5M / Pre-Seed / Oct 01, 2021 | ||
| GetSetUp is an online platform and community that helps older adults enjoy more fulfilling, independent, and socially connected lives through learning. GetSetUp offers on-demand, engaging learning experiences that range from teaching everyday technical skills to enrichment-focused courses taught by passionate instructors. | $10M / Oct 13, 2020 | ||
| GetSetUp is an online platform and community that helps older adults enjoy more fulfilling, independent, and socially connected lives through learning. GetSetUp offers on-demand, engaging learning experiences that range from teaching everyday technical skills to enrichment-focused courses taught by passionate instructors. | $10M / Seed / Oct 12, 2020 | ||
| Exer Labs uses AI on mobile and tablet devices as well as computer vision to help fitness users experience a more interactive and affordable at-home workout. | $2M / Seed / Oct 07, 2020 | ||
| GetSetUp is an online platform and community that helps older adults enjoy more fulfilling, independent, and socially connected lives through learning. GetSetUp offers on-demand, engaging learning experiences that range from teaching everyday technical skills to enrichment-focused courses taught by passionate instructors. | Angel / Feb 14, 2020 | ||
| WegoPro provides a platform that simplifies business travel and expense management for companies. The company helps manage business trips, automate expense reporting, and provide meaningful insights to business owners. | $1.2M / Seed / Aug 27, 2018 | ||
| Scoop is a creator of multi-platform tools that enable businesses and workers to take advantage of flexible work arrangements.The company's platform provides the tools and information required to reduce operational costs while giving workers the opportunity to work from any location, making it simple for businesses to run both an in-officeand remote environment.Scoop was established in January 2015 by Rob Sadow and Jonathan Sadow in San Francisco, California. | $5.1M / Seed / May 24, 2016 | ||
| Scoop is a creator of multi-platform tools that enable businesses and workers to take advantage of flexible work arrangements.The company's platform provides the tools and information required to reduce operational costs while giving workers the opportunity to work from any location, making it simple for businesses to run both an in-officeand remote environment.Scoop was established in January 2015 by Rob Sadow and Jonathan Sadow in San Francisco, California. | Seed / Nov 02, 2015 | ||
| See all 12 investments → | |||
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FAQ
What does David Ko invest in?
David Ko invests primarily in Internet, Software and Virtual Workforce startups, most often at Seed and Angel stage. Most of the 12 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 David Ko's check size?
David Ko typically joins rounds of $1.2M–$10M at Seed. These ranges are 10th–90th percentile round sizes calculated from confirmed public funding rounds, so they are a realistic guide to the rounds David Ko participates in.
How do I contact David Ko?
Public channels for David Ko include LinkedIn. 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.
When did David Ko last invest?
The most recent investment recorded for David Ko closed in Sep 2025. Shizune tracks 12 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 Sep 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.
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