Coelius Capital

F4 is a product-led venture capital firm that offers a platform where every founder can enter, and their work decides their progress. It provides a roadmap for founders to close the gap through mentor time, investor intros, and capital targeted for those proving they can build.

Cruise.com is a platform for comparing cruise deals and offers services for travel agents. It features cruise ships with in-room automation for control of lighting, temperature, and service.

Fireflies.ai is an AI-powered notetaker that transcribes, summarizes, and analyzes team conversations to enhance productivity and automate workflows.

OneSignal is a customer engagement platform that unifies push notifications, email, SMS, and in-app messaging, allowing businesses to orchestrate messaging across channels for a consistent, high-impact experience.

HelloSign, now known as Dropbox Sign, provides a platform for electronic signatures, enabling users to sign documents online, create electronic signatures, and manage document workflows without the need for paper.

Booksy is a global leader in online booking for beauty services, recently acquiring the French startup Kiute to expand its offerings.

LYTE is an open tech platform for event producers to control their own secondary market and integrate with a primary ticketing platform, enhancing the fan experience and providing better data insights for event creators.

Shortcut (formerly Clubhouse) is a fast and powerful project management tool designed for software teams, featuring AI collaboration and various project management functionalities.

mParticle is a hybrid Customer Data Platform (CDP) that combines real-time responsiveness with warehouse-native scale, allowing multi-channel brands to deliver adaptive customer experiences.

Metaview is an AI recruiting platform that enhances the hiring process through AI agents, offering tools for notetaking, candidate sourcing, and reporting.

Thrive Capital operates with a deliberately low-profile, secretive brand and attribution-free team model while making a small number of very large, high-conviction bets and stepping in as an anchor investor during market stress. The firm combines early-stage investing with multi-billion-dollar growth rounds from the same platform while maintaining a small, elite partnership and hybrid identity as both investor and operator through company-building efforts.

20VC operates at the intersection of venture capital and media, using Harry Stebbings' podcast platform and content brands (20Growth, 20Sales, 20Product) to source deals and support companies rather than relying on traditional partnership networks. The fund grew from Stebbings' podcast audience into a $400M vehicle with an LP base of 40+ unicorn founders and global institutions, scaling unusually fast by turning listeners into investors and co-investors.

Operates a Sage model where CEOs and serial founders embed as hands-on operators, sometimes interim leaders, hatch and prototype startups internally, and bring hundreds of millions in follow-on capital. The firm also hatches new companies internally by having partners identify opportunities, do research and prototyping, then match concepts with founders—functioning partially like a startup studio while running a traditional venture fund.

Early-stage batch accelerator turning tiny MVPs into companies via 400+ startups per batch, intense peer-pressure learning, founder-character screening, and founder-first support that reduces career risk. YC pioneered the modern batch-based accelerator model in 2005, systematically transforming tiny MVPs into venture-scale companies at industrial scale with 400+ startups per batch and a portfolio exceeding 4,000 companies, achieving unusually high success rates where ~4.5-5.5% become unicorns compared to ~2.5% for other venture-backed startups.