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SocketLabs vs Substack
SocketLabs: Email sending plus performance analytics. Substack: Writers making money doing the work they believe in. Same fact set for both, straight from each vendor's docs.
SocketLabs
- Free tier
- No free plan; first month of Core free (40,000 emails), no card required
- Paid from
- $39.95/mo (Core, 40,000 emails) · pricing page
- Public API
- Yes docs
- MCP server
- No · No official or community MCP server found in searches
- Best for
- Email sending plus performance analytics
- Website
- https://www.socketlabs.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?
SocketLabs suits email sending plus performance analytics. 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 SocketLabs alternatives, Substack alternatives, or the full table.