Neither CloudSMTPServer nor SMTP offers a free trial.
CloudSMTPServer 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 CloudSMTPServer begins at $1,000/Month, while pricing details for SMTP are unavailable.
Some top alternatives to CloudSMTPServer includes SMTP2GO, JangoSMTP, SocketLabs, SMTP, Kingmailer, Mailrelay, Mailercloud, Qualified, Workvivo, InitSky Bulk Email Server, Jetsend and IFTTT.
Some top alternatives to SMTP includes Campaigner and Moosend.