[LeonM]

I always thought that the 'W' in YC batch numbers stood for 'winter', or isn't it? Or is 'W19' in the title a typo and should it be 'W18'?

[chirau]

It does. They are probably in the current batch, which would be W19.

[bigzyg33k]

I think that the batches are named based on when they're due to finish YC