Yes, both SendGrid and Backbench offer a Free Trial.
SendGrid is designed for Large Enterprises, Medium Business and Small Business.
Backbench is designed for Freelancers, Medium Business and Small Business.
The starting price of Backbench begins at $25/Month, while pricing details for SendGrid are unavailable.
Some top alternatives to SendGrid includes SMTP, Campaigner and Moosend.
Some top alternatives to Backbench includes Clustered Cloud, NexaStack, Qualified, Workvivo, Jotcode, Serverless Cloud, CloudTask, ModernCloud, ServiceBench, Nimbella Serverless Platform, SaaS Forge and Bunnyshell.