Clayton Hoefer

Technology Leader

📍 San Francisco, California, United States🔄 Updated September 2026💼 2 investments📅 12 years investing🗓 Last invested Jul 2017𝕏 @upgrade_to_unlock
Operator-angel🌍 United States
2
Total investments
2
Early stage
0
Mid stage
0
Late stage
12y
Years active

Portfolio

2 investments · sorted by recency
All investments
Early stage
Mid stage
Late stage
Angel Investor
Jul 2017
Blokable creates prosperity and equity in communities by disintermediating the traditional development process and providing a vertically integrated solution to create housing at scale. Our solution is a new paradigm in development, enabled by a new building system and technology.
early stageReal Estate
Angel Investor
Mar 2014
Calm is a leading mental health company on a mission to support everyone on every step of their mental health journey. Our flagship consumer app—ranked #1 in its category with over 180 million downloads and available in seven languages across nearly 190 countries—helps people sleep better, stress less, and live more mindfully through content and tools from experts and beloved celebrity voices. Since our launch, we’ve expanded our offerings with Calm Sleep, an app providing deeper, personalized sleep support, and Calm Health, an evidence-based digital solution offered through employers, health plans, and providers to expand access, boost benefits engagement, and drive positive health outcomes. Today, Calm supports more than 3,500 organizations and reaches over 26 million covered lives through Calm Health. Recognized as a TIME100 Most Influential Company and one of Fast Company’s Brands That Matter, Calm was co-founded by Alex Tew (Million Dollar Homepage) and Michael Acton Smith (Mind Candy, Moshi Monsters, Firebox).
Experience · 4 entries
All (4)
Investments (2)
Founder (1)
2022
Principal Software Engineer
Jun 2022
At SimpleHash we’re on a mission to organize the world of NFTs and digital assets. We build APIs and developer tooling to abstract away this complexity for developers. We index all the major blockchains, take care of the edge cases, ingest all the media, and provide a set of simple to use endpoints to quickly access all this information. We’re backed by some of the best investors and players in the business, including Y Combinator, Coinbase Ventures, OpenSea Ventures, Funders Club, and a host of extremely accomplished angels, including founders of Segment and Doppler, and early employees of Stripe and 0x.
CTO & Co-Founder
Apr 2022
H3 Healthcare Holdings is a woman-owned business, founded in 2022 to help providers tackle the immense challenges of running a medical practice. H3 helps clinicians optimize their healthcare business so they focus on what matters most: caring for patients. Services: Revenue Optimization Collect on services above industry average, transform rev cycle operations, develop payer strategies, benchmark performance Patient Engagement Improve adherence, eliminate no shows, reduce readmissions, advance health literacy Practice Automation & IT Integrate solutions, automate tasks, analyze vendors, assess risk, improve data security Strategy & Innovation Add/expand services, integrate innovative digital health solutions, advise on regulatory changes, facilitate access to capital
2017
Angel Investor
Jul 2017
Blokable creates prosperity and equity in communities by disintermediating the traditional development process and providing a vertically integrated solution to create housing at scale. Our solution is a new paradigm in development, enabled by a new building system and technology.
early stageReal Estate
2014
Angel Investor
Mar 2014
Calm is a leading mental health company on a mission to support everyone on every step of their mental health journey. Our flagship consumer app—ranked #1 in its category with over 180 million downloads and available in seven languages across nearly 190 countries—helps people sleep better, stress less, and live more mindfully through content and tools from experts and beloved celebrity voices. Since our launch, we’ve expanded our offerings with Calm Sleep, an app providing deeper, personalized sleep support, and Calm Health, an evidence-based digital solution offered through employers, health plans, and providers to expand access, boost benefits engagement, and drive positive health outcomes. Today, Calm supports more than 3,500 organizations and reaches over 26 million covered lives through Calm Health. Recognized as a TIME100 Most Influential Company and one of Fast Company’s Brands That Matter, Calm was co-founded by Alex Tew (Million Dollar Homepage) and Michael Acton Smith (Mind Candy, Moshi Monsters, Firebox).