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SmartrMail vs Substack

SmartrMail: Ecommerce stores wanting simple automated product emails. Substack: Writers making money doing the work they believe in. Same fact set for both, straight from each vendor's docs.

SmartrMail

Free tier
Free plan up to 200 subscribers (about 1,000 emails/mo)
Paid from
$14/mo · pricing page
Public API
Yes docs
MCP server
Community · Third-party viaSocket connector; no official vendor server
Best for
Ecommerce stores wanting simple automated product emails
Website
https://www.smartrmail.com

Substack

Free tier
Free to publish, no subscriber cap
Paid from
No monthly fee; 10% of paid subscription revenue plus Stripe fees · pricing page
Public API
Yes docs
MCP server
Community · Community servers on GitHub only
Best for
Writers making money doing the work they believe in
Website
https://substack.com

Which one?

SmartrMail suits ecommerce stores wanting simple automated product emails. Substack suits writers making money doing the work they believe in. Pricing changes; the fact tables above link both vendors' live pricing pages. For the rest of the field, see SmartrMail alternatives, Substack alternatives, or the full table.