Yes, both SendGrid and UI Bakery offer a Free Trial.
SendGrid is designed for Large Enterprises, Medium Business and Small Business.
UI Bakery is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing details for both SendGrid and UI Bakery are unavailable at this time. Contact the respective providers for more information.
Some top alternatives to SendGrid includes SMTP, Campaigner and Moosend.
Some top alternatives to UI Bakery includes LiveCode, Planet Crust, Appup by 500apps, Simplifier, DOCOVA, Netcall Liberty Create, Flowfactory, DrapCode, SDMT LCAP/LCNC Platform and Noodl.