YC-Backed Captain401 Wants To Make Creating A 401k Easier For Businesses Captain401, a service that helps small businesses set up a 401k, is launching out of Y Combinator today. The goal of Captain401 is to make managing 401ks as simple as other services are for other functions within companies — and in a more digitally focused manner like Zenefits or Zenpayroll. Captain401 seeks to create a proce