Home › Compare › Kit (formerly ConvertKit) vs Substack
Kit (formerly ConvertKit) vs Substack
Kit (formerly ConvertKit): Email-first operating system for creators. Substack: Writers making money doing the work they believe in. Same fact set for both, straight from each vendor's docs.
Kit (formerly ConvertKit)
- Free tier
- Free Newsletter plan, up to 10,000 subscribers
- Paid from
- $39/mo (Creator, at 1,000 subscribers); subscriber-based · pricing page
- Public API
- Yes docs
- MCP server
- Yes · Official Kit MCP (app.kit.com/mcp) plus docs MCP
- Best for
- Email-first operating system for creators
- Website
- https://kit.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?
Kit (formerly ConvertKit) suits email-first operating system for creators. 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 Kit (formerly ConvertKit) alternatives, Substack alternatives, or the full table.