Based on your answers, my personal recommendation is GetResponse.
GetResponse is a solid email marketing software that has been around for years. They are a particularly good option for affiliate marketers and entrepreneurs with a relatively small marketing budget.
The platform recently added some great new features making it one of the most affordable automation platforms available… plus, it's simple to use, inexpensive, and will get the job done.
Keep in mind that as your business grows, there's a good chance you'll want a more advanced system that allows for segmentation and can help you scale. That's where ConvertKit and Ontraport come in.
According to DMA, marketers have found a 760% increase in email revenue from segmented campaigns, so use GetResponse to start… just know you'll be movin' on up in the near future 🙂