ycombinator.com
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Y Combinator is a leading startup accelerator and seed investor. The site offers information about applying to the YC program, funding and mentorship, and a library of essays, startup profiles, and resources to help you learn how to pitch and grow a startup.
More resources on Pitching Ideas
pitchdeck.io
PitchDeck.io provides ready-to-use investor pitch deck templates and a gallery of example decks to help you structure and present ideas effectively. It also offers slide-by-slide guidance, design tips, and best practices for pitching to investors.
entrepreneur.com
Entrepreneur.com is a business- and startup-focused resource offering practical, how-to articles, expert guidance, and industry news on starting, growing, and funding a company, with content on pitching ideas, marketing, leadership, and strategy.
Entrepreneurial Pitching
Coursera course: Entrepreneurship