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MailUp vs Substack
MailUp: Businesses and agencies doing email + SMS with unlimited sends. Substack: Writers making money doing the work they believe in. Same fact set for both, straight from each vendor's docs.
MailUp
- Free tier
- No free plan; 15-day free trial (up to 1,000 sends)
- Paid from
- EUR 48/mo (Starter, billed annually; pay-per-speed, unlimited sends) · pricing page
- Public API
- Yes docs
- MCP server
- No · Only third-party connectors (Zapier MCP); none from vendor
- Best for
- Businesses and agencies doing email + SMS with unlimited sends
- Website
- https://mailup.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?
MailUp suits businesses and agencies doing email + sms with unlimited sends. 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 MailUp alternatives, Substack alternatives, or the full table.