The top 7 startups from Y Combinator W17 Demo Day 1

A Fitbit for cows, USB ports for bionic limbs and microbatteries were amongst the most promising companies of the 52 that launched at Y Combinator’s winter 2017 Demo Day 1 yesterday. After asking investors their favorites and huddling with the TechCrunch team, here are our picks for the top 7 startups.

Click through/scroll to learn about each. You can read our full coverage of all the companies that demoed yesterday here, and plus here’s our write-ups for the 51 Day 2 companies and our top Day 2 picks.