Hi, Nice question lot of aspiring startup asking this question. As per my view there is not age limit or bar .i think very body know Mark Zuckerberg In 2007, he was just 23 years old boy became one of the youngest billionaires in the world on the back of Facebook.
Hart Main is a 14-year old that came up with the idea of manly scented candles when he was teasing his sister about the girly scented ones she was selling for a school fundraiser. Although she didn't expect him to fully pursue the manly scented candles idea himself, he did, and the idea has turned into a nationwide success.
Arjun Santhosh Kumar, a 10th grade student of Velammal Vidhyshram in Chennai, is the Founder & CEO of his company LateraLogics, age 15 yrs.
Shravan and Sanjay Kumaran , age 13 & 15 yrs ,
Class : 9th & 11
Designation: Co-Founder & President (Shravan) and Co-Founder & CEO (Sanjay), GoDimensions
so, dear upper or lower age is criteria to make startup.
only criteria is RIGHT TIME & RIGHT PRODUCT /SERVICES you offering.
i do hope it will help you.