Yes, both SendGrid and Support.cc by 500apps offer a Free Trial.
SendGrid is designed for Large Enterprises, Medium Business and Small Business.
Support.cc by 500apps is designed for Large Enterprises, Medium Business and Small Business.
The starting price of Support.cc by 500apps begins at $9.99/Month when Billed Yearly, while pricing details for SendGrid are unavailable.
Some top alternatives to SendGrid includes Pipedrive, SMTP, Campaigner and Moosend.
Some top alternatives to Support.cc by 500apps includes Zoho Desk, Zendesk Support, ManageEngine ServiceDesk Plus, Freshservice, Freshdesk, Deskero, Teamwork Desk, HelpDesk, SysAid, Jitbit Helpdesk, Snappy, CRMdesk, ReadyDesk, LabiDesk, HESK and BoldDesk.