Sorry but this is an awful metric to gauge success from. It’s like using press to gauge success.

Y Combinator => “Optimizing for funding rounds is just as unproductive as optimizing for headcount, press mentions, conference invites, fancy offices, speaking gigs or top line revenue growth with massively negative unit economics.” (ref: https://blog.ycombinator.com/fundraising-rounds-are-not-milestones/)

If you want to measure “startup accelerator success” then use something like mattermark growth index, pitchbook, alexa data et al to see how the cohorts perform “after” graduation. This will also give you data on which company is alive, how many employees they have et al. Also factor in any exits that happened along the way — this mostly should be public data unless the exit was an acquihire/low.

I’m sure many would be keen to see this data ;-)