Y Combinator is the world's most prominent startup accelerator, having funded over 5,000 companies including Airbnb, Stripe, Dropbox, and Coinbase. Browse profiles of YC partners and investors who shape the next generation of startups.
Garry Tan is a prominent figure in the Silicon Valley ecosystem, widely recognized for his multiface...
Michael Seibel is a prominent figure in the startup and venture capital world, best known for his ro...

Jessica Livingston is a prominent American venture capitalist and author, best known as a founding p...
Dalton Caldwell is a highly respected figure in the startup ecosystem, known for his diverse experie...
8 investors

Jessica Livingston is a prominent American venture capitalist and author, best known as a founding partner of Y Combinator, one of the most prestigious startup accelerators in the world. She played a crucial role in the early development and success of numerous high-profile tech companies, shaping the modern startup landscape.Before co-founding Y Combinator in 2005 with her husband Paul Graham, Robert Morris, and Trevor Blackwell, Livingston had a diverse background in marketing and event organization. Her unique skill set proved invaluable in building the YC community and fostering its supportive environment.Livingston is also the author of "Founders at Work: Stories from the Early Days of Startups," a highly acclaimed book featuring interviews with successful startup founders about their initial experiences. This work reflects her deep understanding of the entrepreneurial journey and her commitment to sharing valuable insights with aspiring founders.
Michael Seibel is a prominent figure in the startup and venture capital world, best known for his roles as a co-founder of Twitch (acquired by Amazon for $970 million) and Justin.tv. He currently serves as the Managing Director of Y Combinator, one of the most prestigious startup accelerators globally.Seibel's journey in tech began early, leading him to build and sell successful companies before transitioning into his influential role at Y Combinator. His experience as a founder gives him a unique perspective on the challenges and opportunities faced by early-stage startups, making him a highly respected mentor and investor.
Garry Tan is a prominent figure in the Silicon Valley ecosystem, widely recognized for his multifaceted career as an entrepreneur, investor, and now, as the President and CEO of Y Combinator. He originally joined Y Combinator as a partner in 2010, where he focused on advising and funding early-stage startups. His deep understanding of product development and company building made him an invaluable asset to the accelerator program.Before returning to lead Y Combinator, Tan co-founded and managed Initialized Capital, an early-stage venture capital firm. Under his leadership, Initialized Capital grew to manage over $3.2 billion in assets, with a portfolio that includes many successful companies across various sectors. His journey also includes significant entrepreneurial experience as a co-founder of Posterous (acquired by Twitter) and an early employee at Palantir, where he focused on user interface design.
Brad Flora is an accomplished entrepreneur, investor, and software engineer, best known as the founder of Perfect Audience, a leading retargeting platform acquired by Marin Software in 2013. His journey in the tech industry began early, showcasing a knack for identifying market needs and building innovative solutions.After the successful exit of Perfect Audience, Flora transitioned into angel investing, leveraging his extensive experience in product development, marketing, and scaling startups. He has become a prominent figure in the startup ecosystem, recognized for his strategic insights and supportive mentorship. His investment portfolio spans a diverse range of sectors, reflecting his broad interest in groundbreaking technologies and disruptive business models.
Dalton Caldwell is a highly respected figure in the startup ecosystem, known for his diverse experience as a multiple-time founder, angel investor, and venture capitalist. His career trajectory showcases a deep understanding of building and scaling companies from the ground up, a perspective he now brings to his roles in funding and advising new ventures.As a managing partner at Fifty Years and a partner at Y Combinator, Caldwell plays a pivotal role in identifying and nurturing early-stage startups, particularly those focused on impactful and often overlooked sectors. His journey includes successful exits and valuable lessons learned from both triumphs and challenges, making him a seasoned mentor for aspiring entrepreneurs.Caldwell's influence extends beyond capital allocation; he is an active voice in the tech community, frequently sharing insights on startup growth, product development, and the future of technology through various platforms. His commitment to supporting founders is evident in his hands-on approach and dedication to fostering innovation.
Kat Manalac is a prominent figure in the startup ecosystem, recognized for her instrumental roles at Y Combinator and as a co-founder of the Portland Seed Fund. Her career has been dedicated to identifying and nurturing early-stage companies, helping them navigate the challenges of growth and secure further funding.Manalac's expertise lies in community building, program development, and fostering environments where founders can thrive. Her work has significantly impacted numerous startups, guiding them from nascent ideas to successful ventures. She is a vocal advocate for entrepreneurs and a key connector within the venture capital world.
Anu Hariharan is a distinguished Partner at Y Combinator Continuity, where she plays a pivotal role in leading growth-stage investments in some of the world's most promising startups. Her impressive career is marked by a deep expertise in finance, operational scaling, and strategic leadership, making her a formidable force in the venture capital landscape. Hariharan has been instrumental in guiding numerous companies through critical growth phases, leveraging her extensive experience to identify and nurture future industry leaders.Before her tenure at Y Combinator Continuity, Anu Hariharan held significant positions that honed her financial acumen and strategic capabilities. She was a Partner at Andreessen Horowitz (a16z), where she co-led the growth fund, overseeing investments in rapidly expanding companies. Her earlier career included leadership roles at Lightspeed Venture Partners and various investment banking positions. This diverse background provided her with a comprehensive understanding of market dynamics, fundraising, and the operational challenges faced by high-growth companies.Hariharan is particularly recognized for her insightful perspectives on SaaS metrics and business models, often sharing her knowledge through publications and public speaking engagements. Her work focuses on helping founders understand the key drivers of sustainable growth and how to optimize their businesses for long-term success. She has become a trusted advisor for many entrepreneurs, guiding them through complex financial strategies and market expansions. Her current focus at Y Combinator Continuity involves identifying disruptive technologies and business models, continuing her commitment to fostering innovation and supporting the next generation of entrepreneurial talent.
Carolynn Levy is a highly respected figure in the venture capital world, renowned as one of the founding partners of GV (Google Ventures). Her career trajectory showcases a deep understanding of technological innovation and strategic investment, positioning her as a key player in shaping the startup ecosystem. Levy's early career involved significant roles at Google, where she contributed to various initiatives before transitioning into the investment arm of the tech giant.As a founding partner at GV, Carolynn Levy played an instrumental role in building the firm's investment strategy and portfolio. She has been involved in identifying and nurturing numerous promising startups across diverse sectors, including life sciences, enterprise software, and consumer technology. Her expertise extends beyond capital allocation, as she often acts as a strategic advisor to founders, leveraging her extensive network and operational experience.Beyond her work with GV, Carolynn Levy is an active and influential angel investor. This dual role allows her to engage with the startup community at various stages, from early-seed funding to more mature venture rounds. Her commitment to fostering innovation and supporting entrepreneurial talent has solidified her reputation as a thoughtful and impactful investor in the technology landscape.
Y Combinator (YC) was founded in 2005 by Paul Graham, Jessica Livingston, Trevor Blackwell, and Robert Tappan Morris. It pioneered the startup accelerator model — investing small amounts of money in a large number of startups, providing intensive mentorship over a 3-month batch program, and culminating in Demo Day where founders pitch to hundreds of investors.
YC's portfolio reads like a who's who of tech: Airbnb, Stripe, Dropbox, Coinbase, DoorDash, Instacart, Reddit, and Twitch were all YC companies. The combined market capitalization of YC alumni companies exceeds $600 billion, making it arguably the most successful investment program in history.
Under current CEO Garry Tan, YC continues to evolve — expanding its global reach, increasing batch sizes, and adapting its program for AI-native companies. YC invests $500K in each company via a standard deal: $125K for 7% equity plus a $375K uncapped SAFE. The program's real value, however, comes from the YC network — alumni founders actively help each other, creating a powerful flywheel of talent, customers, and follow-on funding.
Y Combinator has historically been sector-agnostic, funding companies across nearly every industry. However, several themes dominate recent batches.
AI-native products, developer infrastructure, and tools that leverage LLMs — the fastest-growing category in recent YC batches, representing over 40% of companies.
Payments infrastructure, neobanks, embedded finance, and cross-border payment solutions targeting underserved markets globally.
Digital health platforms, AI-assisted diagnostics, drug discovery, and tools that bring software engineering practices to healthcare and life sciences.
Y Combinator accepts applications on a rolling basis, with two main batch cycles per year (Winter and Summer). The application process is straightforward: submit a written application through the YC website, and if selected, complete a 10-minute interview with YC partners.
YC looks for strong founding teams above all else. The ideal YC founder is technically skilled, deeply knowledgeable about their market, and has a bias for action. YC famously values "makers" — founders who can build the product themselves rather than relying on outsourced development.
Your application should clearly articulate: what you're building, who it's for, why now, and what unique insight your team has. YC partners have said repeatedly that they look for "earnest" founders — people who are genuinely passionate about solving a real problem, not just chasing a trend.
The acceptance rate is extremely competitive (roughly 1.5–2%), but YC actively encourages reapplications. Many successful YC companies were rejected on their first try. Michael Seibel, YC Managing Director, has shared that the best applications demonstrate rapid iteration and learning between submission cycles.
YC invests $500K per company: $125K for 7% equity, plus a $375K uncapped SAFE (Simple Agreement for Future Equity). This is a standardized deal offered to all companies accepted into the program.
Key YC partners include Garry Tan (CEO), Michael Seibel (Managing Director), Dalton Caldwell (Managing Director), Jessica Livingston (co-founder), Kat Manalac (Outreach Partner), and Carolynn Levy (Office Hours Partner).
Demo Day is the culmination of each YC batch, where companies present to an audience of hundreds of investors. It has become one of the most important events in the startup funding ecosystem, often resulting in oversubscribed rounds within days.
Yes. Y Combinator accepts founders from around the world. Many YC companies are founded by international teams. During the batch program, teams are expected to be based in San Francisco, though YC has become more flexible about remote participation post-pandemic.
Discover profiles and contact information for leading angel investors worldwide. These investors back early-stage startups with personal capital, offering mentorship and strategic connections alongside funding.
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a16z InvestorsAndreessen Horowitz (a16z) is one of Silicon Valley's most influential venture capital firms, founded in 2009 by Marc Andreessen and Ben Horowitz. With over $42 billion in assets under management, a16z has backed transformative companies like Facebook, Airbnb, Coinbase, and GitHub. Their philosophy — "software is eating the world" — continues to drive investments across AI, crypto, bio, and enterprise software.
Sequoia InvestorsSequoia Capital is one of the world's most storied venture capital firms, founded in 1972 by Don Valentine. Known for early investments in Apple, Google, YouTube, and WhatsApp, Sequoia manages a multi-stage, global fund structure across the US, Europe, India, and Southeast Asia.