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Iterable vs Substack
Iterable: Enterprise brands running cross-channel engagement. Substack: Writers making money doing the work they believe in. Same fact set for both, straight from each vendor's docs.
Iterable
- Free tier
- No free plan; sales-led, no public self-serve trial
- Paid from
- Custom quote · pricing page
- Public API
- Yes docs
- MCP server
- Yes · Official open-source MCP server (beta, launched Nov 2025) covering most Iterable API endpoints.
- Best for
- Enterprise brands running cross-channel engagement
- Website
- https://iterable.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?
Iterable suits enterprise brands running cross-channel engagement. 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 Iterable alternatives, Substack alternatives, or the full table.