There are many people who harbor more than they should as a result of the decisions they may have made, for better or for worse. The worst thing a person could do is to habor these thoughts in their mind and not have an outlet. People a faced with multitude of decisions they have to make each day, typically made with limited information at the time. When looking at these decisions they may have felt like the person was carrying the weight of the world but in retrospect, many times people look back when they overcame and come to the realization that it was not so bad. That is an optimal outcome. What if the decision they made wasn't so optimal and the outcome had adverse or undesired consquences that the person never intended on. They will harbor their thoughts and their thoughts will ultimately consume them if they don't have a place to vent.
Confessional.com is a platform that would allow for people to vent all their skeltons that they harbor anonomously to help them deal with them and prevent repression. The ultimate goal would be to help the person grow from their experiences.
A person could be generalized as a sum of their actions. The actions are less important if they were able to learn from them, then their reactions to each subsequent occurance becomes more valuable.
There are currently no known direct competitors. Although there are forums and Quora.com that provide anonymity to users who pose questions. Alternately, there are paid services like psychologists, local meetup groups and/or church groups that provide a forum for discussion but lack anonymity.
There could be different existing groups that could be reached out to that could complement their services. Such as Alcoholics Anonomous (AA) after a person completes their program they are hopefully prepared for the challenges they are going to face. Confessional.com, could for example, provide them with additional support to identify the underlying reasons as to why they turn to the bottle.