Yes, both AppInstitute and BuildFire offer a Free Trial.
AppInstitute is designed for Individuals, Freelancers, Large Enterprises, Medium Business and Small Business.
BuildFire is designed for Large Enterprises, Medium Business and Small Business.
Pricing for AppInstitute Starts at $42/Month when Billed Yearly whereas for BuildFire Starts at $159/Month.
Some top alternatives to AppInstitute includes AppYourself, Bizness Apps, A2Zapps, Apphive, Native, geekApps, 2OS App Builder and AppMaster.io.
Some top alternatives to BuildFire includes Bubble, Adalo, Bizness Apps, Apphive, Applify, Flutter, Appy Pie, Appily App Builder and Andromo.