Y Combinator (YC), a prominent startup accelerator responsible for launching companies such as Reddit, DoorDash, and Airbnb, has observed a notable trend in the application submissions it receives. Founders are increasingly using artificial intelligence (AI) to generate responses for their applications, a shift that is being highlighted by signs in the writing style.
According to YC partner Tyler Bosmeny, the average length of applications has surged by 60% over the past three years, suggesting that AI tools are enabling founders to produce more extensive responses. His observations indicate a marked increase in the use of certain linguistic patterns, notably the frequent appearance of the word “wedge” and an uptick in the use of em dashes.
Another YC partner, Pete Koomen, noted that the usage of “wedge” in applications rose dramatically from less than 1% in the spring of 2025 to over 20% in the summer of 2026. The use of em dashes, which began to gain popularity in 2023, further accelerated, finding its peak in the summer of 2025 when over 50% of applications included them.
This evolution in language is coupled with a decline in the use of certain words like “delve,” which YC co-founder Paul Graham pointed out as indicative of AI-influenced writing styles. He highlighted a preference among founders for a more “hard-hitting journalistic style” in emails, suggesting a departure from how founders traditionally communicated.
YC’s analysis reflects broader changes in how technology influences the startup landscape, raising important questions about authenticity and the implications for founder communication.
Why this story matters:
- Highlights the impact of AI on startup communication and application processes.
Key takeaway:
- Increasing use of AI tools is changing the length and style of YC applications, influencing startup culture.
Opposing viewpoint:
- Critics argue that reliance on AI may undermine the authenticity and originality of founder narratives.
