FastField offers Free Trial, but Zapier does not.
Zapier is designed for Large Enterprises, Medium Business and Small Business.
FastField is designed for Individuals, Medium Business and Small Business.
Pricing for Zapier Starts at $19.99/Month when Billed Yearly whereas for FastField Starts at $23/user/month when yearly.
Some top alternatives to Zapier includes Pabbly Connect, Integrately, eZintegrations, Zoho Flow, ZapUp by 500apps, SaaS Integrator, Built.io Flow, Activepieces and ApiX-Drive.
Some top alternatives to FastField includes Cognito Forms, Formsite, Typeform, MightyForms, 123FormBuilder, stepFORM, Microsoft Forms, GoCanvas, Jotform Mobile Forms, Forms.io by 500apps, FormLink and Formee.