Yes, both SendGrid and Unlayer Studio offer a Free Trial.
SendGrid is designed for Large Enterprises, Medium Business and Small Business.
Unlayer Studio is designed for Individuals, Freelancers, Medium Business and Small Business.
The starting price of Unlayer Studio begins at $15/Month, while pricing details for SendGrid are unavailable.
Some top alternatives to SendGrid includes SMTP, Campaigner and Moosend.
Some top alternatives to Unlayer Studio includes Campaigner, Moosend, SMTP, Omnisend, Constant Contact, Campaign Monitor, GetResponse, Emma, FreshMail, Elite Email, Elite Campaign, SendFox, Speedy Newsletter, SpeedyNewsletter, Mail Studio and Dragit.