Neither Blocks nor SMTP offers a free trial.
Blocks is designed for Large Enterprises, Medium Business and Small Business.
SMTP is designed for Individuals, Freelancers, Large Enterprises, Medium Business and Small Business.
The starting price of Blocks begins at $16/Month when Billed Yearly, while pricing details for SMTP are unavailable.
Some top alternatives to Blocks includes Campaigner, Moosend, SMTP, Omnisend, Zoho Campaigns, Constant Contact, Campaign Monitor, GetResponse, Stripo.email, Groupmail, SendFox, BEE, Speedy Newsletter, SpeedyNewsletter, Emaily and Mail Studio.
Some top alternatives to SMTP includes Campaigner and Moosend.