Yes, both Ninja Forms and Formstack offer a Free Trial.
Ninja Forms is designed for Large Enterprises, Medium Business and Small Business.
Formstack is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Ninja Forms Starts at $49/Year whereas for Formstack Starts at $50/Month when Billed Yearly.
Some top alternatives to Ninja Forms includes Formidable Forms, Cognito Forms, Formsite, Typeform, Gravity Forms, Jotform, 123FormBuilder, weForms, WPForms, Forms, Forms.io by 500apps and FormLink.
Some top alternatives to Formstack includes Cognito Forms, Zoho Forms, Formsite, Typeform, Google Forms, Jotform, 123FormBuilder, FormAssembly, stepFORM, forms.app, Microsoft Forms and Framestr Online Forms.