Wiktionary
n. (context business English) A fellow business professional who acts as a moderating influence and mentor
Wikipedia
An accountability partner is a person who coaches another person in terms of helping the other person keep a commitment. The term is a neologism and has gained relatively wide use since the 1990s. The term is often used by Christians where the accountability partner helps a person adhere to a moral commitment, such as refraining from viewing a pornographic internet site. It was originally used in connection with weight loss programs in the 1960s.
By 2016 a partner can help with multiple types of physical fitness, starting or improving a business, a business or personal project, or other purpose involving a goal.
Not having an accountable partner to help a person accomplish their goal is one reason 92% of people did not accomplish their New Year's resolution according to a University of Scranton study by Dan Diamond in Forbes and an article by Dale Tyson.
Usage examples of "accountability partner".
You need a small group or an accountability Partner who will encourage you, support you, pray for you, love you unconditionally, and hold you accountable.