Best Substack Alternatives in 2026

Looking for a Substack alternative? Here is what to look for and where Rainmail fits.

Why senders leave Substack

Substack is a newsletter and subscription platform; users most often switch over spam complaints, prohibited content, and deliverability on shared infrastructure. A dedicated-IP sender with managed deliverability removes those risks.

What to look for

• Visible deliverability (SPF/DKIM/DMARC + dedicated IP).
• Pricing that does not punish growth.
• A provider that welcomes your industry.

How Rainmail helps

Rainmail sends from your own domain on a dedicated, isolated IP with SPF, DKIM, DMARC, reverse-DNS and managed warm-up handled for you, plus an AI that watches your list health and deliverability — and it welcomes the senders Amazon SES, SendGrid and Mailchimp reject, from $8. Run the free 10-second checker or see plans.