AINEWS
A third party dataset of 1,841 Y Combinator post mortems names OpenAI and Anthropic as the dominant next stops, with 105 destinations tracked and the framing asserted by the curator.
Of 1,841 Y Combinator startups that have shut down, the small slice with a tracked current employer lands overwhelmingly at two companies: OpenAI and Anthropic. The pattern comes from joinedanthropic.com, a third-party snapshot last updated July 14, 2026, where a curator has gone through accelerator post-mortems and, where possible, tagged the founder's next role. The headline claim, "OpenAI and Anthropic, mostly," is the curator's, not an audited census.
The dataset only tracks 105 of 1,841 destinations. The 20 visible names on the page tilt hard toward the two AI labs. Tom Brown appears with OpenAI or Anthropic affiliations. Tom Blomfield, Christopher Berner, Michael Petrov, Alex Karpenko, Eric Zhang, Joe Gershenson, Brian Fioca, Sridatta Thatipamala, Elfred Pagan, Peter Lai, Brian Krausz, Igor Kofman, Alexei Karpenko, Chris Lloyd, and Kevin Kelley all appear with OpenAI or Anthropic affiliations. Brian Fioca confirmed his own move in a LinkedIn anniversary post marking a year at OpenAI. Sam Altman also appears on the list, though his path through YC predates the post-mortem cohort by a generation.
Emmett Shear, Gabor Cselle, and Sean Grove are all marked "former" at OpenAI. A static "founder is now at OpenAI or Anthropic" reading misses that the dataset is a moving target, and several of the most-cited names have already moved on.
The first critique landed the same day on Hacker News. Commenters pointed out that 105 out of 1,841 is a thin slice, that the destinations depend on publicly findable, self-reported information, and that the "mostly" framing is asserted by the curator, not derived from the full sample. The critique is fair, and the page would be more credible with it surfaced.
Outside the YC set, the pattern holds. OfficeChai reported that the chief technology officers of Instagram, Workday, You.com, and Adept have joined Anthropic as Members of Technical Staff. The Anthropic MTS lane is not just an accelerator-alumni phenomenon. Senior engineers from non-YC companies with successful exits are taking the same route, which suggests the destination list reflects how the labs hire, not just how YC alumni fail.
OpenAI and Anthropic are paying aggressively for research and infrastructure talent. Anthropic's "Member of Technical Staff" title has become a recognizable import lane from senior industry roles, and a founder who has shipped a product, raised a round, and shut down is exactly the kind of operator that title was built for. A founder whose company dies no longer has a long menu of acquirers, growth-stage startups, or new venture ideas to choose from. The menu is shorter, and the top of it is two labs.
TechCrunch's July 13 piece on the "last wave of tech winners" returning to grinding sits next to this dataset without overlapping it. Different sample, different question, same direction. Successful founders are going back to work as employees rather than starting something new. The YC shutdown data is the most concentrated version of that trend: when a startup fails, the founder often ends up at a frontier lab.
Two readings are alive at once. The first is that two labs are vacuuming up the best operators, with implications for competitive diversity and ecosystem health. The second is that the labs are simply the highest-paying buyers for a narrow band of skills, and the rest of the market catches up later. Both can be true, and neither is settled by 105 data points.
The dataset will keep moving. Names will be added, others will be marked "former," and the headline claim will soften or sharpen as the sample grows. The next batch of YC shutdown hires will be the first real test of whether the OpenAI-Anthropic concentration is the new market structure or a 2026 snapshot.