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Substack vs Systeme.io
Substack: Writers making money doing the work they believe in. Systeme.io: Launching an online business with one tool. Same fact set for both, straight from each vendor's docs.
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
Systeme.io
- Free tier
- Free plan: 2,000 contacts, unlimited emails
- Paid from
- $17/mo (Startup) · pricing page
- Public API
- Yes docs
- MCP server
- Yes · Official MCP server documented in vendor help center (contacts, tags, newsletters, funnels).
- Best for
- Launching an online business with one tool
- Website
- https://systeme.io
Which one?
Substack suits writers making money doing the work they believe in. Systeme.io suits launching an online business with one tool. Pricing changes; the fact tables above link both vendors' live pricing pages. For the rest of the field, see Substack alternatives, Systeme.io alternatives, or the full table.