The 6 most exciting vibe coding startups at Y Combinator's Demo Day for its summer cohort

The emergence of vibe coding is undeniably reshaping the tech landscape, and Y Combinator (YC), the renowned startup accelerator in Silicon Valley, is at the forefront of this shift. A wave of startups leveraging artificial intelligence to facilitate coding is making waves in YC's latest summer cohort, according to insights from industry leaders and investors. YC President and CEO Garry Tan highlighted earlier this year that an impressive 25% of the startups in the current batch utilized AI for 95% of their coding needs. Similarly, Diana Hu, a YC group partner, noted that the concept of vibe coding is gaining traction and will be increasingly integrated into YC initiatives starting summer 2024. Coined by Andrej Karpathy, a founding member of OpenAI, vibe coding is rapidly becoming a staple in Silicon Valley, influencing everything from tech job postings to Meta’s interview processes. Gabriel Jarrosson, managing partner at Lobster Capital, remarked on the trend, stating, “Vibe coding has evolved from a niche experiment to a mainstream startup model.” This shift is further supported by YC’s venture capital partners, who are now sharing best practices for vibe coding, underscoring its growing permanence in the industry. Jared Heyman, managing partner at the Rebel Fund, pointed out a significant increase in vibe coding startups within YC, noting nine such companies in the spring 2025 batch and asserting that this innovative approach to coding is here to stay. Despite the excitement surrounding vibe coding, it is not without its challenges. Engineers have reported that while this method can lead to a surge in funding, it may also introduce errors and prove less effective for tackling complex programming tasks. Here are six standout vibe coding startups from YC’s summer 2025 cohort: **Bitrig**: This startup offers a vibe coding tool that enables users to create applications through conversations with AI, primarily coding in Swift for iOS apps. Founded in 2025 by Apple veterans Kyle Macomber, Tim Donnelly, and Jacob Xiao, Bitrig showcases the ease of app development with a whimsical anecdote from Macomber about building a tracking app for his son’s birthday party. **Floot**: Founded by Yujian Yao and Edward Look in 2025, this app empowers entrepreneurs to construct web applications. With a user base of 14,000, Floot is already a vital tool for its founders, who emphasize the competitive nature of the vibe coding market. **Okibi**: This innovative web app allows users to articulate their needs in simple English, enabling the creation of AI agents that communicate with internal company software to automate tasks. Founded by Mahyad Ghassemibouyaghchi and Saurav Mitra in 2025, Okibi highlights the paradigm shift in software development fostered by vibe coding. **Stagewise**: Launched in 2024 by Glenn Töws and Julian Goetze, this platform allows developers, designers, and product managers to build and enhance web applications directly in their browsers. The goal is to streamline the development process by reducing reliance on frontend developers. **Vibe Code Go**: This mobile app, founded by Chris Nolet and Ryan Burgoyne in 2025, facilitates coding on-the-go for software engineers. Nolet notes that while junior engineers see moderate improvements in productivity, senior engineers experience significant gains, hinting at the future integration of vibe coding into standard software engineering practices. **VibeFlow**: Founded in 2025 by Alessia Paccagnella and Elia Saquand, this tool enables non-coders to generate full websites from prompts while also accessing backend logic, making web development more accessible than ever. With the rise of these innovative startups, vibe coding is poised to redefine the future of software development, making it more intuitive and efficient than ever before.