SendFox is an email marketing service: it keeps a business's list of subscribers and sends them newsletters and automated emails. It is made by AppSumo, which calls it an AppSumo Original, and is aimed at creators on a small budget.
Emails are written in a drag-and-drop editor with merge tags, which insert each contact's own data such as the first name; they can be tested, scheduled, and tracked for opens and clicks. Smart Campaigns connect a blog's RSS feed or social accounts and turn new posts into a newsletter that is formatted and scheduled automatically. Smart Pages are hosted landing pages and signup forms, so no website is needed. Automations send a welcome sequence when someone joins the list. Lists can be imported from Mailchimp or a CSV file, and an email API sends app emails such as receipts and login codes.
SendFox is a hosted service. The free plan covers up to 1,000 contacts and 3,000 sends a month; a lifetime plan is a one-time payment with a fixed total of sends, and the Pro plan is a monthly subscription.