GetResponse offers Free Trial, but PostSheet does not.
PostSheet is designed for Freelancers, Medium Business and Small Business.
GetResponse is designed for Large Enterprises, Medium Business and Small Business.
The starting price of GetResponse begins at $15.58/Month when Billed Yearly, while pricing details for PostSheet are unavailable.
Some top alternatives to PostSheet includes Pipedrive, Campaigner, Moosend, SMTP, Omnisend, Constant Contact, MailChimp, GetResponse, Mailjet, GStep, Bulky, Sendicate, Inbox Mailers, Mailsend by 500apps, SendFox, Emaily and Go Mail Merge.
Some top alternatives to GetResponse includes Pipedrive, Campaigner, Moosend, SMTP, ActiveCampaign, Omnisend, Constant Contact, MailChimp, Campaign Monitor, MailerLite, AWeber, ConvertKit, Elite Campaign, ClickFunnels, FlyerFunnel, SendFox and CloudFunnels.