Yes, both SendGrid and Follow Up Boss offer a Free Trial.
SendGrid is designed for Large Enterprises, Medium Business and Small Business.
Follow Up Boss is designed for Medium Business and Small Business.
The starting price of Follow Up Boss begins at $1,000 when Billed Monthly, while pricing details for SendGrid are unavailable.
Some top alternatives to SendGrid includes SMTP, Campaigner and Moosend.
Some top alternatives to Follow Up Boss includes Thryv, monday sales CRM by monday.com, Pipedrive, Zoho CRM, Vendasta, HubSpot CRM, Indydesk Sales, noCRM.io, GoCRM, CRM.io by 500apps, LeadDesk, LionDesk, Brivity CRM, Chime CRM and ConvertLead.