Yes, both SendGrid and SweepWidget offer a Free Trial.
SendGrid is designed for Large Enterprises, Medium Business and Small Business.
SweepWidget is designed for Large Enterprises, Medium Business and Small Business.
The starting price of SweepWidget begins at $25/Month when Billed Yearly, while pricing details for SendGrid are unavailable.
Some top alternatives to SendGrid includes SMTP, Campaigner and Moosend.
Some top alternatives to SweepWidget includes Gleam, Rafflecopter, Make My Contest, VYPER, EasyPromos, Votigo, Evalato, Contest Rebel, GiveLab, Queue and ShortStack.