@jgbrock1 said:

Not so much a competitor to PlusSpec, because PlusSpec is a complete parametric modeler and estimates items created with it. However, Estimator allows users to assign costs to anything they model, as well as sort via their own cost codes (PlusSpec I believe has their own coding system you have to use, but not sure) in a branded report. I created and own Estimator for SketchUp (and Devin did a great job bringing it to life:) It is simple but powerful tool. We just launched it and hope to have Devin adding new features to reflect users needs.

PlusSpec looks pretty powerful but many builders and even architects using SU will have more than enough with Estimator and another extension John Brock initiated "Profile builder". Also these two SU extensions have a very reasonable one-time price tag, while PlusSpec will set you back by USD 700 every year. You've got to be doing a lot of work using PlusSpec to justify that outlay.