John Fontein
Co-Founder @ Sesame
New York, United States
John Fontein is a seed investor at Sesame in New York focused on Health Care and Information Technology. John Fontein is Co-Founder and President at Sesame. Previously, he was the VP of Business Development at GoEuro where he oversaw all revenue functions including sales, marketing and partnerships. John began his career at Goldman Sachs where he worked in both the Investment Banking and Investment Management Divisions of the firm. John is amulti-platinum song-writer, producer, and sound designer. He is the recipient of numerous awards including an MTV Video Music Award, a Berklee Jazz Festival Award and a FringeNYC Award.John attended Saint Ann's School in Brooklyn and graduated summa cum laude from Princeton University with a B.A. in Music and a certificate in Computer Science.
- Total investments:
- 17
- Last investment:
- Lead investor:
- 0%
Last updated:
For AI agents: llms.txt
Industries John Fontein invests in
Stages John Fontein invests in
Countries John Fontein invests in
Round sizes
Round size
- Seed
- $962k–$5.6M
- Pre-Seed
- $200k–$210k
- Series A
- $17M–$424M
Investment Focus
Industry
- Health Care 4 (24%)
- Information Technology 4 (24%)
- Wellness 3 (18%)
- Education 3 (18%)
- Cryptocurrency 3 (18%)
Stage
- Seed 9 (53%)
- Pre-Seed 3 (18%)
- Series A 2 (12%)
- Series B 1 (6%)
- Series E 1 (6%)
Country
- United States 13 (76%)
- United Kingdom 1 (6%)
Investments
| Company | Description | Round | Links |
|---|---|---|---|
Legion Health
|
Legion Health provides telepsychiatry services that enhance patient access to mental health care. The company focuses on integrating technology to streamline interactions between patients and providers while ensuring services are covered by insurance. It aims to support comprehensive mental wellness through personalized treatment plans andcollaboration with other care team members. | $5.6M / Seed / Sep 15, 2024 | |
Fleet
|
Fleet is a mobility-as-a-Service software for enterprise transportation needs. | $2.5M / Seed / Aug 27, 2024 | |
Delfina
|
Delfina provides a personalized prenatal care system that uses the power of data to keep moms and babies safe during pregnancy. Their data-driven approach is uncovering unique insights in prenatal care to pave the way for clinical innovation. | $5.3M / Seed / Mar 09, 2022 | |
ivee
|
ivee is a digital health platform that matches patients to clinicians, empowering them to receive in-home care.Our platform removes the friction of traditional care and allows patients to receive health and wellness services at their location, on their own time. Our mission is to make care more accessible by bringing it in-home.ivee launched inJuly 2020 and is based in Brooklyn, New York. | $4M / Seed / Mar 01, 2022 | |
Vivvi
|
Vivvi provides child care and early learning services for families and tools for recruitment, retention, and productivity to employers. Its mission is to honor the potential of working parents by providing them with an infant and toddler and preschool program designed to equip their children with a lifelong love of learning and simultaneously meettheir schedule, financial, and knowledge needs.It was founded in 2018 and is headquartered in New York, New York. | $15M / Series B / Jan 16, 2022 | |
Gemini
|
Gemini is a next-generation cryptocurrency exchange and custodian that allows customers to buy, sell, and store digital assets. The company was founded in 2014, by brothers Cameron and Tyler Winklevoss, to build a bridge to the future of money. Its goal to build a world-class digital asset exchange and custodian based in the United States. | $423.9M / Series A / Nov 18, 2021 | |
BlockFi
|
BlockFi is a secured non-bank lender that offers USD loans to crypto-asset owners who collateralize the loan with their crypto-assets. Their products bring additional liquidity to the blockchain asset sector and meet the needs of both individuals and institutions holding blockchain assets. BlockFi holds clients' Bitcoin and Ether with aregistered custodian and issues loans in USD to their bank accounts. Currently operating in beta launch, lending in 35 US states to retail investors and companies.BlockFi’s mission is to provide liquidity, transparency, and efficiency to digital financial markets by creating products that meet the needs of consumers and corporations across the globe. They leverage a sophisticated infrastructure that integrates with multiple blockchains, they plan to expand their product set based on their retail and institutional client's needs. | $500M / Series E / Aug 20, 2021 | |
Verifiable
|
Verifiable is developing an API that will enable healthcare providers to simplify license authentication by connecting with state and federal databases. Verifiable allows users to reach hundreds of primary sources in one location, as well as next-generation tracking that automates compliance, reduces risk, and keeps patients safe.Founded byNicholas Macarioand Vivekanand Rajkumar in the year 2019 and is based in San Francisco, California, United States. | $17M / Series A / Aug 06, 2021 | |
Realtime
|
Realtime is a social network designed to connect people through pop-up video chats. Realtime enables users to create video chat rooms where they can socialize with new people, connect with friends, and host convos about topics that interest them that are simple and fun. | $4M / Seed / Dec 01, 2020 | |
Rally
|
Rally is Mass Mobility as a Service: technology and model innovations for the business of buses. With millions of rides completed, Rally is disrupting the mode of transportation that moves more people than any other. Our AI creates new intercity routes for regional transport and our crowdfunding/sourcing marketplace facilitates surge demandfor travel during peak times or mass movements. Rally converts private car users to shared bus riders, unlocking the value of the underutilized assets of the bus industry. While Rally introduces bus travel to many first-time riders, our platform also provides traditional bus charter customers the digital tools to manage their entire journey, from route planning and procurement to marketing automation, payments and customer service. | $4M / Seed / Dec 17, 2019 | |
| See all 17 investments → | |||
Co-Investors
About Sesame
Sesame is a healthcare superstore, with over 10,000 medical practices offering affordable prices on the full scope of health care. For anyone looking for affordable care options, save up to 60% on in-person and telehealth visits with top primary care doctors, specialists, dentists, therapists, dermatologists, labs, imagine centers, and more.Available today at affordable prices, even without health insurance.The company removes the complexities of the care chain to put power back in the hands of people, not systems. Sesame’s mission is to ensure quality care is accessible to all Americans who need it, regardless of their insurance status while benefiting clinicians who seek to meet the needs of their patients.Sesame was founded in 2018 and based in New York City, New York.
Sesame Contacts
| Name | Phone | Socials | |
|---|---|---|---|
David Goldhill
Co-Founder & CEO
|
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Gerard Murphy
VP, Product
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John Fontein
Co-Founder
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Liam Costello
Chief Architect; Lead Backend Engineer
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Michael Botta
Co-Founder
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FAQ
What does John Fontein invest in?
John Fontein invests primarily in Health Care, Information Technology and Wellness startups, most often at Seed and Pre-Seed stage. Most of the 17 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 John Fontein's check size?
John Fontein typically joins rounds of $962k–$5.6M at Seed, $200k–$210k at Pre-Seed and $17M–$424M 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 John Fontein participates in.
When did John Fontein last invest?
The most recent investment recorded for John Fontein closed in Aug 2024. Shizune tracks 17 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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