GetResponse offers Free Trial, but Letterfuel does not.
Letterfuel is designed for Freelancers, Medium Business and Small Business.
GetResponse is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Letterfuel Starts at $19/Month whereas for GetResponse Starts at $15.58/Month when Billed Yearly.
Some top alternatives to Letterfuel includes Pipedrive, Campaigner, Moosend, SMTP, Omnisend, Constant Contact, GetResponse, Sendicate, Groupmail, Inbox Mailers, SendFox, Speedy Newsletter, SpeedyNewsletter, NoCodeLetters, Newsletter to Kindle, Emaily and Relike.email.
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.