Sinnergy, LLC

Sinnergy, LLC (AKA Limited Liability Company) is a company featured in the Welcome to Hell comic and film.

Canon Media
While little is actually known about this company or exactly how it works, Wester has provided some incite through this post about it's initial design. It seems to be one of several companies in Hell that Mephistopheles holds jurisdiction over and is powered by a combination "Sin" energy (giving the play on words) and Hellfire.

Based on dialogue that was cut from the film, Mephistopheles was interested in having this company (and others yet to be introduced) help make Hell more efficient with the handling of every individual's afterlife experiences, and by keeping up with Heaven's more advanced technology. If successful, Sinnergy, LLC could reduce the amount of paperwork he would have to handle once the renovations are complete.

UC Stories
Within the Universal Clarification Series, this company is the main powerhouse for Hell, in which Mephistopheles is the equivilance of a Top CEO (much preferring the "boss" title by his employees). Like in canon media, it is mostly powered on HellFire and the direct "energy" of sinners. However, Mephistopheles tries to keep much of this company's inner workings a secret from anyone not directly affiliated with his team of executive leaders. He typically refers to any and all workers as "Sinners."

The official logo is based on Wester's worksheet from the MoregueBook, in which the flame aspect is most prominently featured.