Yes, both Timblee and Wireframe.cc offer a Free Trial.
Timblee is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Wireframe.cc is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Timblee Starts at $9/Month whereas for Wireframe.cc Starts at $12/Month when Billed Yearly.
Some top alternatives to Timblee includes Miro, Balsamiq, Axure RP, Wireframe.cc, Wirify, Claritee, Stage, SmartDraw, FlowMapp and Zen Wireframe.
Some top alternatives to Wireframe.cc includes Miro, HotGloo, NinjaMock, Balsamiq, Moqups, Axure RP, Wirify, Claritee, Stage, Zen Wireframe and Mockframe by 500apps.