The best alternatives to Whatcha are Codementor, Startups Anonymous, and Askmee. If these 3 options don't work for you, we've listed a few more alternatives below.
What do you think of Whatcha?
AssemblyAI— Speech-to-Text API with superhuman accuracy
StartupsAnonymous.com is a safe haven, free from retribution for those working in Startups. Launching a confessional booth soon and hoping to launch local SA meetups in the near future.
Aloha Buddy! This fun app lets you ask questions to your friends on a wide variety of topics on just a tap of a button,it also lets you create fun polls among your friends as well as provides you with a digital personal diary that is completely private and backed up on google drive to let you reminisce your life moments.