Participated · Seed · Aug 2026

Apollo Atomics focuses on shrinking and mass-manufacturing the steam generator—the largest component in many nuclear plants—by using a compact metal block with needle-thin channels to transfer heat more efficiently. Its design, based on MIT research, enabled the company to build a reactor it says is roughly 40-times smaller than ones using conventional steam generators and to assemble systems in a factory rather than on site. Apollo has built a 40-kilowatt demonstration reactor at MIT and plans to offer reactor sizes from about 10 megawatts-electric up to 300 megawatts. The company projects it can build a 300 MW plant in under 24 months and estimates the reactor will cost four to five times less to produce than existing designs. Apollo targets a levelized cost of electricity near 3 cents per kilowatt-hour and aims for commercial deployment in 2028. It participated in Y Combinator’s Spring 2026 batch.

Participated · Seed · Jul 2024

SoundHealth develops personalized, AI-enabled, non-invasive medical and wellness devices targeting breathing and sleep disorders. Its flagship FDA-cleared Sonu band has delivered more than 500,000 acoustic resonance treatment sessions for users ages 12 and up and is described as a leading steroid alternative for congestion due to allergic and non-allergic rhinitis. The company has built a craniofacial anatomical dataset used to personalize treatments and to underpin its Spatial Sleep product, which the company says is the world’s first clinically proven personalized sleep wellness device and has been shown to help users fall asleep faster and sleep longer. SoundHealth is recommended by more than 1,000 medical and dental professionals nationwide. Following the Series A, the company has $12.25 million in total funding to date to support further growth and commercialization.

Participated · Series B · Jun 2022

Sesame is a two-sided online medical care marketplace that lets patients research, shop for, and book physicians on a pay-per-visit basis. The platform offers virtual and, in some locales, in-person care with fixed, upfront prices and claims to cover primary care, acute consults, chronic care management, roughly 40 specialties, dentistry, labs and imaging. It hosts over 2,500 healthcare providers across all 50 states and, since going live in mid-2020, has served in excess of 150,000 patients. Sesame says the average price paid on its marketplace is about $40, with some visits as low as $25, and that just over 60% of patients have some form of insurance. The company monetizes by charging a percentage of each visit and reports growth of roughly 25% month-over-month and revenue growth of nearly 500% year-over-year. CEO and co-founder David Goldhill frames the service as "half-price, whole quality" care, emphasizing pricing transparency and reduced administrative burden for physicians. Sesame is piloting a membership product, SesamePlus, currently in beta and planned for general availability, offering discounted visits for a $99 annual or $10.99 monthly fee. Sesame operates a dynamic direct-pay healthcare marketplace that enables patients to find, book, and pay doctors directly for telehealth, prescriptions, and in-person visits. The company says it supports over 1,000 providers treating patients across all 50 states and facilitates thousands of in-person and telehealth visits every month. Sesame reports its business has grown 25x in the past year. The company plans to use the new funding to strengthen its full-scope marketplace and expand its nationwide telehealth offerings and in-person care. Sesame is launching prescription medication delivery this month to give cash-pay patients access to affordable medication. Since founding in 2019, Sesame has raised just under $50 million in total capital.

Participated · Series A · Mar 2022

Tomo Mortgage develops a continuous automation platform designed to make the lending process faster and cheaper. Led by CEO Greg Schwartz, the company focuses on digital mortgage products and process automation. In 2024 Tomo achieved 3.5x growth and is positioning itself to be one of the largest mortgage companies in the U.S. It now operates in 31 states, including D.C., and is rapidly hiring loan officers and other mortgage professionals for Detroit, Seattle and New York offices. The company is shifting its headquarters from Stamford, CT to New York City and intends to use the new funding to expand its team and product offerings. To date Tomo has raised $130M in total investment. Tomo positions itself as a "PayPal for the mortgage industry," offering underwritten pre-approvals and verified pre-approvals that avoid a hard credit inquiry and can be completed in about three hours. The company uses data and software to accelerate the purchase process and help buyers compete in competitive bidding markets. Tomo covers nearly a third of the U.S. market and recently expanded into Michigan and Ohio. It focuses exclusively on purchase mortgages and does not offer refinance products. Founded in October 2020 by former Zillow executives Greg Schwartz and Carey Armstrong, Tomo has about 150 employees across offices in Seattle, Austin, and Stamford, Conn. The startup faces competition from traditional mortgage providers and other tech companies digitizing real estate processes. Tomo is building a consumer-focused digital mortgage platform that aims to simplify and speed up the home‑buying mortgage process. The company says it will issue fully underwritten pre-approvals “within hours, not days,” guarantee on-time closings, and use data to get buyers to closing in as little as 21 days versus an industry average of 47 days. Tomo is strictly focused on purchase mortgages for buyers and will not offer refinancing products. It launched operations concurrently with its funding announcement in Seattle, Dallas and Houston. The founders leverage prior experience at Zillow—Schwartz led sales and revenue operations and Armstrong led buyer services strategy and operations. Tomo announced a large $70M seed financing as it begins operations. Tomo Networks is a Stamford, Conn.-based digital mortgage and transaction company that aims to improve the homebuying experience. Founded in October 2020 by Greg Schwartz and Carey Armstrong, the fintech combines a human-driven, technology-enabled approach to mortgage and transaction processes. The company focuses on streamlining the homebuying process through digital tools paired with human support. Tomo raised $40M in seed funding to expand operations and its business reach. The startup intends to use the funds to scale operations and broaden its market presence.

Participated · Series C · Jan 2022

Facet operates a tech-driven platform that pairs members with CERTIFIED FINANCIAL PLANNER™ professionals to deliver personalized, unbiased financial planning without asset minimums via an affordable flat membership fee. The company is an SEC-registered investment adviser and reports serving over 14,000 households. Facet says it will use new capital to advance technology development, expand its suite of financial planning services, and improve the overall member experience. The firm emphasizes a subscription model that targets consumers often overlooked by traditional AUM-based advisors. Facet has received recognition from outlets including Real Simple, NerdWallet and TIME. Since its founding in 2016, it has raised approximately $210 million in funding to date. Facet Wealth offers tech-driven, subscription financial planning that pairs proprietary technology with CFP® professionals to deliver fiduciary, no‑asset‑minimum advice across all aspects of clients' financial lives. The company emphasizes a transparent subscription fee model intended to democratize access to financial planning and reach an estimated 40 million underserved American households. Its core product is integrated, personalized financial plans delivered 1:1 by CFPs and supported by a suite of technology and client‑experience tools. Facet plans to use the new funding to continue fueling rapid growth and to invest in its technology, product suite, and client experience. The firm has grown roughly 10x since 2020, serves more than 10,000 clients, and employs over 300 people across 42 states. Facet was founded in 2016 and has raised approximately $165 million in total funding since inception. Facet Wealth offers comprehensive financial planning services that pair clients with fiduciary financial-planner professionals to develop long-term relationships. The company also provides a Financial Wellness offering for employers seeking to give employees comprehensive financial guidance. Facet has pre-launch employer partnerships with ClassPass, MyVest and ChiliPiper. The business reports rapid product growth and intends to use new funding to accelerate market expansion. The company is headquartered in Baltimore, Maryland and is led by co-founder and CEO Anders Jones. Professionals serving clients are located across the United States. Facet Wealth provides comprehensive, transparent financial planning by pairing clients with dedicated CFP® Professionals supported by a proprietary technology platform. The company is an SEC-registered investment advisor and positions itself as a fiduciary serving mass-affluent households often underserved by traditional wealth managers. Facet delivers personalized, on-demand service intended to lower the cost and increase access to high-quality financial advice. The firm partners with incumbent financial services firms to identify and transition clients who do not fit those incumbents’ ideal profiles, enabling broader access and practice-level benefits for partners. Facet plans to use new capital to accelerate expansion, scale its proprietary technology platform, and pursue substantial industry partnerships. The company is based in Baltimore and serves clients nationwide.