January 20th, 2025

YC X25, the spring 2025 batch

Y Combinator has launched its first spring batch, X25, for 2025, running from April to June. Applications are open until February 11, 2025, to support emerging startups amid AI advancements.

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YC X25, the spring 2025 batch

Y Combinator has announced its first-ever spring batch, designated as X25, which will take place from April to June 2025. This new addition to their program comes as Y Combinator now operates four batches annually: Winter, Spring, Summer, and Fall. The decision to use "X" for the spring batch was influenced by its common usage in programming, aligning with Y Combinator's roots in technology. The organization aims to accommodate the increasing number of founders looking to start businesses, particularly in light of rapid advancements in AI. Applications for the X25 batch are currently open, with a deadline set for February 11, 2025, at 8 PM PT. The program will culminate in an in-person demo day, showcasing the startups that participate.

- Y Combinator introduces its first spring batch, X25, for 2025.

- The spring batch will run from April to June 2025.

- Applications are open until February 11, 2025.

- The decision to use "X" reflects programming conventions.

- Y Combinator aims to support the growing number of startups due to AI advancements.

AI: What people are saying
The announcement of Y Combinator's first spring batch, X25, has generated various reactions and discussions among commenters.
  • Some founders express interest in applying despite previous rejections, questioning the necessity of funding.
  • There is a lively debate about the naming convention for the batch, with suggestions ranging from using letters to numerical designations.
  • Commenters appreciate the "X" prefix, associating it with innovation and a unique identity.
  • Some suggest that using months instead of seasons would be clearer for international participants.
  • Overall, there is excitement about the new batch and its potential impact on startups.
Link Icon 15 comments
By @simonsarris - 15 days
good for them but

> One of the first questions people ask when we say we are doing a spring batch is what letter we will use to refer to it since “S” is already taken for the summer batch. We considered something like “Sp” or “P” but one founder made the suggestion of using “X” since it's a common variable name in programming and thus makes sense since the name “Y Combinator” itself is a programming term.

This chain of reasoning seems totally disconnected? "While trying to come up with a single letter to denote spring, since S was taken, we decided on... a common variable name instead" ??? what happened to denoting spring in there? Am I missing some clever reference? Is spring in particular the season for common variables?

The spring constant (in physics) is denoted by the letter "k", why not use that? I know its not programming, but at least it denotes spring.

By @tptacek - 15 days
V25, the Vernal YC 2025 batch!
By @miletus - 15 days
We’re hosting a meetup in SF for founders applying to the first-ever spring batch

Come connect with other ambitious founders and gain insights from the YC alumni

Date: Feb 6

Time: 6:30 PM

RSVP here: https://lu.ma/lwdw64cn

See you there!

By @edoceo - 15 days
What about YC25q1, YC25q2, YC25q3 and YC25q4?
By @andrewstuart - 15 days
Months would be easier to follow than seasons for those of us on the upside down world.
By @65 - 15 days
They should do batches by pure three digit numbers. E.g.

251 for winter 252 for spring 253 for summer 254 for fall

By @vednig - 14 days
Our startup(from India) applied twice last two batches, and were rejected but now we're far beyond MVP stage, we've had LOI and traction from users, it seems that we do not require additional funding should we still apply for X25 ?
By @xg15 - 15 days
> X25

I hope you checked this back with Elon.

By @triyambakam - 15 days
Can YC be attended completely remotely, or which incubators can be?
By @ccamrobertson - 15 days
Honestly, X is such a cool prefix I would opt for this batch. It sounds like you are part of some skunkworks batch.

The "F" batches are a bit confusing due to the YC Fellowships eons ago whichd I recall were prefixed with "F" as well.

By @neeleshs - 15 days
B25 for Bloom would've been nicer
By @ilrwbwrkhv - 15 days
This is great. There is still nothing like YC. Great news for batches who get in.
By @apt-apt-apt-apt - 15 days
X sounds way cooler than SP, Q2 etc. This is the real reason, all else are rationalizations