Yes, both Terrastruct and Gliffy offer a Free Trial.
Terrastruct is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Gliffy is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Terrastruct Starts at $4.99/Month whereas for Gliffy Starts at $8/Month when Billed Yearly.
Some top alternatives to Terrastruct includes Miro, FigJam, SmartDraw, Gliffy, Microsoft Visio, DrakonHub, Creately, Lucidchart, AutoCloud, Isoflow, Quick Diagram and diagrams.net.
Some top alternatives to Gliffy includes Miro, FigJam, SmartDraw, Cacoo, Microsoft Visio, DrakonHub, Creately, Lucidchart, EDraw Max, DrawSQL, Quick Diagram and diagrams.net.