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Constant Contact vs Substack

Constant Contact: Digital and email marketing for small businesses. Substack: Writers making money doing the work they believe in. Same fact set for both, straight from each vendor's docs.

Constant Contact

Free tier
No free plan; 30-day free trial
Paid from
$12/mo (Lite); contact-count based · pricing page
Public API
Yes docs
MCP server
Community · Community/third-party MCP servers only
Best for
Digital and email marketing for small businesses
Website
https://www.constantcontact.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?

Constant Contact suits digital and email marketing for small 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 Constant Contact alternatives, Substack alternatives, or the full table.