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Campaign Monitor vs Substack

Campaign Monitor: Straightforward email marketing for growing businesses. Substack: Writers making money doing the work they believe in. Same fact set for both, straight from each vendor's docs.

Campaign Monitor

Free tier
Free tier framed as 30-day trial (500 contacts, 500 emails)
Paid from
$12/mo (Lite); subscriber-count based · pricing page
Public API
Yes docs
MCP server
Community · Community MCP servers only
Best for
Straightforward email marketing for growing businesses
Website
https://www.campaignmonitor.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?

Campaign Monitor suits straightforward email marketing for growing businesses. 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 Campaign Monitor alternatives, Substack alternatives, or the full table.