Both are strong choices. The short answer: pick Kit if you are creators, coaches and newsletter authors. Pick Substack if you are writers monetizing directly with subscriptions.
| Kit | Substack | |
|---|---|---|
| In one line | Creator-first email marketing, formerly ConvertKit, with powerful tagging and paid newsletter tools. | Publish a free or paid newsletter with zero setup. |
| Pricing | Free to 10k subscribers; from $25/mo | Free; 10% of paid subscriptions |
| Free tier | Yes | Yes |
| Best for | Creators, coaches and newsletter authors | Writers monetizing directly with subscriptions |
| Category | Email Marketing | Email Marketing |
| Website | kit.com | substack.com |
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