Ethan Choi

Partner

📍 Palo Alto, California, United States🔄 Updated July 2026💼 26 investments📅 12 years investing🗓 Last invested Oct 2025
VC🌍 United States20+ investmentsInvested this year
26
Total investments
3
Early stage
6
Mid stage
12
Late stage
12y
Years active

Portfolio

22 investments · sorted by recency
All investments
Early stage
Mid stage
Late stage
Board Observer
Oct 2025
DualEntry is the first ERP built AI-native from the ground up. You can close the books faster by automating most of your manual tasks with DualEntry AI, freeing up time to focus on strategy and helping your business scale without adding to headcount. A one-person finance team? Its possible with DualEntry. Mid-market enterprises that have outgrown starter cloud and on-premise finance systems choose DualEntry to scale to IPO. You can handle multiple entities, multiple currencies, real-time reporting, and high transaction volumes on one customizable platform. Our customers range from enterprises with $5M in annual revenue to NYSE-listed businesses. DualEntry is based in New York City and was founded by two experienced entrepreneurs who previously built a $100M-revenue business. In October 2025 we announced a $90M Series A from Lightspeed Venture Partners, Khosla Ventures, and GV (Google Ventures).
Investor
Oct 2025
Vercel provides the developer tools and cloud infrastructure to build, scale, and secure a faster, more personalized web. Customers like Under Armour, Nintendo, The Washington Post, and Zapier use Vercel to build dynamic user experiences on the web.
Investor
Jun 2025
Work AI for all. The Work AI platform connected to all your data. Find, create, and automate anything.
Investor
Jun 2025
Founded in 2018, Abridge is the first AI-native clinician intelligence platform organized around the patient, built for clinicians, and designed to help health systems coordinate the clinical, financial, and evidence-based decisions for every moment of care. Powered by purpose-built AI for healthcare, Abridge connects patients, providers, payers, and life sciences companies. This year, the platform will support more than 100 million patient-clinician conversations across 300 of the largest and most complex health systems in the U.S. With deep EHR integration, Abridge’s automatic speech recognition and note generation has been validated to capture encounters in 28+ languages across specialties and care settings. Abridge is setting the industry standard for the responsible deployment of AI across health systems. Features like Linked Evidence map AI-generated clinical documentation to source data, helping clinicians quickly trust and verify the output. Abridge was awarded Best in KLAS for Ambient AI in 2025 and 2026, in addition to other accolades, including TIME Best Inventions of 2024 and 2025, CNBC Disruptor 2025, and Fast Company’s Most Innovative Companies 2025.
Board Observer
May 2025
ClickHouse is a fast, open-source columnar database built for real-time data processing and analytics at scale. ClickHouse Cloud delivers the query speed and concurrency that applications demanding instant insight from large volumes of data require. As AI agents become more embedded in software, generating higher query volumes at tighter latency, ClickHouse provides a high-throughput, low-latency engine purpose-built for that workload.
Investor
Dec 2024
Our mission is to empower physicians with Al - saving physicians time, reducing burnout, and improving the quality of patient care.
Investor
Oct 2024
OpenAI is an AI research and deployment company dedicated to ensuring that general-purpose artificial intelligence benefits all of humanity. AI is an extremely powerful tool that must be created with safety and human needs at its core. OpenAI is dedicated to putting that alignment of interests first — ahead of profit. To achieve our mission, we must encompass and value the many different perspectives, voices, and experiences that form the full spectrum of humanity. Our investment in diversity, equity, and inclusion is ongoing, executed through a wide range of initiatives, and championed and supported by leadership. At OpenAI, we believe artificial intelligence has the potential to help people solve immense global challenges, and we want the upside of AI to be widely shared. Join us in shaping the future of technology.
Investor
Jul 2024
Aven is reinventing consumer credit. Our mission is to provide the lowest-cost, most transparent, and most convenient access to capital. We use technology to unlock the wealth in your assets and give you credit for what you already own. Our first product is the world’s lowest APR credit card, backed by home equity. Using multiple patented technologies, we’ve reduced a process that typically takes 4–6 weeks and thousands of dollars down to as fast as 15 minutes and $0 to get. Since launching in 2019, Aven cardholders have saved over $200M. We’re proud to maintain a 4.9-star rating on Trustpilot across 5,000+ reviews. Were backed by leading investors including Founders Fund, Khosla Ventures, Sequoia Capital, Caffeinated Capital, General Catalyst, NYCA, and Max Levchin. The team features leaders from top financial services and fintech companies—such as Goldman Sachs, Capital One, Square—as well as technology companies such as Meta, Microsoft, Google, Uber, and Tesla. Aven has been recognized on the Forbes Fintech 50 and the GGV Capital Fintech Innovation 50. And we’re just getting started.
Board Observer
Jun 2024
Your important data is always in motion, spreading to new people, applications, and devices that are outside traditional security controls. We protect data anywhere it goes in the extended enterprise. You cant protect what you cant see. We classify data by analyzing billions of events, not just patterns in the content, assembling a data lineage to identify and protect what other tools can’t.
Investor
Jun 2024
Healthcare designed to keep you healthy and out-of-hospital. 💙 Even is a healthcare company based out of Bengaluru that offers comprehensive health covers for individuals and businesses. Evens plans offer more than just the safety of hospitalisation. How, you ask? With Even, you get > ⁠Free doctor consultations ✅ ⁠> Lab and radiology tests ✅ > ⁠Unlimited access to specialists (dermat, physio, nutritionists etc) ✅ > ⁠Preventive Care for parents ✅ > ⁠Optional insurance benefits ✅ > ⁠Free access to Even Clinics ✅ > ⁠and a lot more ✅ Even is backed by Alpha Wave, Khosla Ventures, Lightrock India and 7 other investors.
Investor
May 2024
Sword is building the future of healthcare through AI Care, a field we pioneered that brings together Artificial Intelligence and Clinical Experts to tackle healthcare’s biggest bottlenecks - access, outcomes, and cost. The result is a world where clinicians are able to focus on what they do best - handling nuance, providing empathy, and delivering the human touch -, while AI focuses on delivering hyper-personalized treatment programs, ensuring scalability, and being available 24/7 so that healthcare meets the needs of the patient, not the other way around. Our platform spans the full continuum of care, from predicting and preventing pain, to treating physical and mental health, and optimizing healthcare operations. We are trusted by over 2,000 organizations globally, across employers, health plans, and governments, having helped our clients generate over $1 billion in healthcare savings, largely by avoiding unnecessary procedures, such as surgeries, imaging, ER visits, and others. We’re backed by some of the world’s most seasoned investors, such as Khosla Ventures, General Catalyst, Founders Fund and others, and currently valued at $4B. We believe in - and are building toward - a world where AI Care is within arm’s reach of every human. If this mission inspires you, join us in building that future: https://swordhealth.com/company/careers.
Investor
Apr 2024
Ramp is an all-in-one financial operations platform designed to save businesses time and money. Combining corporate cards, expense management, bill payments, accounting automation, procurement, travel, treasury, and more, Ramp empowers finance teams to do their best work. More than 70,000 companies, from family-owned farms to space startups, have saved $10B and 27.5M hours with Ramp since its founding in 2019. Investors include Founders Fund, Thrive Capital, Khosla Ventures, Sequoia, Greylock, Stripe, Goldman Sachs, Coatue, and Redpoint, as well as over 100 angel investors who were founders or executives of leading companies. The Ramp team comprises talented leaders from leading financial services and fintech companies—Stripe, Affirm, Goldman Sachs, American Express, Mastercard, Visa, Capital One—as well as technology companies such as Meta, Uber, Netflix, Twitter, Dropbox, and Instacart. Ramp has been named to Fast Companys Most Innovative Companies list and LinkedIns Top U.S. Startups for over 3 years, as well as the Forbes Cloud 100, CNBC Disruptor 50, and TIME Magazines 100 Most Influential Companies. Visit our website for a full list of US state licenses & disclosures: https://ramp.com/legal/state-disclosures
Board Observer
2022
Your all-in-one investment app. We accompany your investment journey for a better financial future!
Board Observer
2021
Somos a plataforma de e-commerce líder na América Latina, que potencializa e motiva mais de 120 mil empreendedores a mostrarem ao mundo do que são capazes. Estamos há 10 anos no mercado, e somos considerados uma das 5 empresas mais valiosas da América Latina. Contamos com um time de mais de 900 colaboradores que trabalham em conjunto no Brasil, Argentina, Colômbia e México para permitir que todos os empreendedores cheguem cada vez mais longe em seus negócios em uma economia cada vez mais digital. Confira nossas oportunidades: https://www.nuvemshop.com.br/trabalhe-na-nuvemshop
Board Observer
2020
Klaviyo (NYSE: KVYO) is the B2C CRM. Powered by its built-in data platform and AI, Klaviyo combines marketing automation, analytics, and customer service into one unified solution, making it easy for businesses to know their customers and grow faster. Klaviyo (CLAY-vee-oh) helps over 176,000 brands like Mattel, Glossier, Daily Harvest, and Liquid Death deliver 1:1 experiences at scale, improve efficiency, and drive revenue.
Show all 22 investments ↓
Experience · 28 entries
All (28)
Investments (26)
Board (8)
2025
Board Observer
Oct 2025
DualEntry is the first ERP built AI-native from the ground up. You can close the books faster by automating most of your manual tasks with DualEntry AI, freeing up time to focus on strategy and helping your business scale without adding to headcount. A one-person finance team? Its possible with DualEntry. Mid-market enterprises that have outgrown starter cloud and on-premise finance systems choose DualEntry to scale to IPO. You can handle multiple entities, multiple currencies, real-time reporting, and high transaction volumes on one customizable platform. Our customers range from enterprises with $5M in annual revenue to NYSE-listed businesses. DualEntry is based in New York City and was founded by two experienced entrepreneurs who previously built a $100M-revenue business. In October 2025 we announced a $90M Series A from Lightspeed Venture Partners, Khosla Ventures, and GV (Google Ventures).
Investor
Oct 2025
Vercel provides the developer tools and cloud infrastructure to build, scale, and secure a faster, more personalized web. Customers like Under Armour, Nintendo, The Washington Post, and Zapier use Vercel to build dynamic user experiences on the web.
Investor
Jun 2025
Work AI for all. The Work AI platform connected to all your data. Find, create, and automate anything.
Investor
Jun 2025
Founded in 2018, Abridge is the first AI-native clinician intelligence platform organized around the patient, built for clinicians, and designed to help health systems coordinate the clinical, financial, and evidence-based decisions for every moment of care. Powered by purpose-built AI for healthcare, Abridge connects patients, providers, payers, and life sciences companies. This year, the platform will support more than 100 million patient-clinician conversations across 300 of the largest and most complex health systems in the U.S. With deep EHR integration, Abridge’s automatic speech recognition and note generation has been validated to capture encounters in 28+ languages across specialties and care settings. Abridge is setting the industry standard for the responsible deployment of AI across health systems. Features like Linked Evidence map AI-generated clinical documentation to source data, helping clinicians quickly trust and verify the output. Abridge was awarded Best in KLAS for Ambient AI in 2025 and 2026, in addition to other accolades, including TIME Best Inventions of 2024 and 2025, CNBC Disruptor 2025, and Fast Company’s Most Innovative Companies 2025.
Board Observer
May 2025
ClickHouse is a fast, open-source columnar database built for real-time data processing and analytics at scale. ClickHouse Cloud delivers the query speed and concurrency that applications demanding instant insight from large volumes of data require. As AI agents become more embedded in software, generating higher query volumes at tighter latency, ClickHouse provides a high-throughput, low-latency engine purpose-built for that workload.
Show all 28 entries ↓
Investment activity
2014–2025 · 26 investments
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