Nathan Milham
Nathan Milham reviewedThe Y Combinator DatabaseThe definitive database of YC companies with all the metrics
 RecommendedPros: 

Fantastic variety of information. Interesting to compare start ups, see YC alumni on a page, track success of YC start ups.

Cons: 

Next level could be to select multiples of your own ranking criteria/weightings and see the rankings change.

No better alternative.

Nathan Milham has used this product for one week.