Yes, both BuildStar and BuildBook offer a Free Trial.
BuildStar is designed for Large Enterprises, Medium Business and Small Business.
BuildBook is designed for Individuals, Large Enterprises, Medium Business and Small Business.
Pricing for BuildStar Starts at $29.95/Month whereas for BuildBook Starts at $79/Month when Billed Yearly.
Some top alternatives to BuildStar includes Procore, UDA ConstructionOnline, Contractor's Office, Contractor's Cloud, Autodesk BIM 360, CoConstruct, BuildBook, Premier Construction Software and I-Cost.
Some top alternatives to BuildBook includes Buildertrend, CoConstruct, BuildTools, Real Build Pro, Buildern, Builderhead, Buildr and BuilderPad.