Neither Plunk nor Maildroppa offers a free trial.
Plunk is designed for and undefined.
Maildroppa is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Plunk Starts at $0.001/email whereas for Maildroppa Starts at $29/Month.
Some top alternatives to Plunk includes Campaigner, Moosend, SMTP, Omnisend, Constant Contact, MailChimp, Campaign Monitor, Mailjet, eFlyerMaker, ExpressPigeon, Elite Campaign, Pabbly Email Marketing, SendFox, Ackwire and Maildroppa.
Some top alternatives to Maildroppa includes Campaigner, Moosend, SMTP, Omnisend, Drip, Constant Contact, Campaign Monitor, GetResponse, MailerLite, MailOptin, SendFox, PrettyLead, OptinMagic, Structure Pie and Mailmunch.
