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Mailtrap vs Substack
Mailtrap: Testing and sending in one platform. Substack: Writers making money doing the work they believe in. Same fact set for both, straight from each vendor's docs.
Mailtrap
- Free tier
- Free: 4,000 sends/mo (150/day) plus 50 sandbox test emails/mo
- Paid from
- $15/mo (Email API Basic, 10,000 emails) · pricing page
- Public API
- Yes docs
- MCP server
- Yes · Official MCP server (github.com/mailtrap/mailtrap-mcp, npm mcp-mailtrap)
- Best for
- Testing and sending in one platform
- Website
- https://mailtrap.io
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?
Mailtrap suits testing and sending in one platform. 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 Mailtrap alternatives, Substack alternatives, or the full table.