105 startups in this batch
YC Summer 2015 arrived at the peak of the on-demand economy and the rapid professionalization of the API ecosystem. This cohort was defined by a shift toward heavy-duty infrastructure and global logistics, as YC began funding more complex, operationally intensive businesses beyond simple consumer apps. It was a moment where the "Uber for X" trend met the reality of enterprise-grade security and automation.
This batch proved that developers were willing to pay for automated vulnerability management and that industrial sectors were ready for autonomous hardware orchestration. They validated the demand for niche content verticalization and high-intent career guidance, proving that users would trade data for specialized, expert-led platforms. These founders pioneered the transition from general-purpose tools to vertical-specific infrastructure.
Many failures in this cohort were driven by unsustainable operational overhead and the friction of manual coordination in logistics. Startups often struggled when their business models relied on expensive content licensing or physical hardware that couldn't scale as fast as their software. Builders today should recognize that while the market need was real, the unit economics often broke without the automation we now take for granted.
The "autonomous ground station" and "dependency tracking" models are ripe for an AI-agent overhaul. In 2026, a solo founder can use LLMs to automate the real-time security remediation and logistics coordination that previously required entire operations teams. The wedge today is replacing 2015's high-burn human workflows with autonomous, self-healing software that manages physical and digital assets.
An online guide that tells talented graduates how to maximise the…
Appcanary tracks the dependencies you use in your apps and servers…
Advanced manufacturing and distribution solutions (for China-based…
Blitz breaks down the complex world of esports and offers new…
CareLedger helps companies save money on healthcare expenses by…
Click & Grow makes indoor urban gardens and farms that take complete…
Power your website with Google Spreadsheets.Acquired by Instabase…
Cofactor closes the precision medicine gap with predictive diagnostics
Flirtey is the world’s first commercial drone delivery service and…
Icon toolkit providing scalable vector icons and social logos for websites and applications.
Gemnote is the easiest way to design, create and send custom products.
Fundraising platform for educational institutions offering online giving, crowdfunding, peer-to-peer fundraising, events, and analytics.
Halolife is an online platform to find and plan a burial or cremation…
Social Infrastructure for Games; Makers of Nakama game server, Satori…
A flexible work app that connects businesses with hourly workers.
Job simulations and assessments. See candidates in action doing the…
Career advancement for Black, Latinx & Native American professionals.
Klarismo turns your body into an interactive experience. We built a…
L. makes award-winning personal care products with organic materials.
Nebia is a breakthrough shower system, based on a premium experience,…
We pioneer solutions to end the global housing crisis by empowering…
Values based personalization at scale for asset and wealth management
PlateJoy is building the technology to power disease prevention and…
Building the lowest-power silicon for embedded deep learning and…
ROSS is an AI-powered legal research platform that can read and…
Scope AR is the leading provider of User Guided Augmented Reality…
Financial payment and loan services for the Medical Cannabis and…
We're changing the world of coffee, one personalized cup at a time.
ShapeScale is a personal 3D scanner and fitness tracker that…
Shred Video builds automated video & photo systems that allow…
Bringing transparency to the app stores and helping developers build…
marketplace for beauty services delivered at the convenience of…
We design and manufacture energy efficient LED lighting fixtures for…
Enterprise Threat Detection: Tuning, Triage, and Analysis by Experts.
Worlds smallest and friendliest café franchise. "The Bike-Powered…