Both are strong choices. The short answer: pick Substack if you are writers monetizing directly with subscriptions. Pick Klaviyo if you are online stores that live on flows and segments.
| Substack | Klaviyo | |
|---|---|---|
| In one line | Publish a free or paid newsletter with zero setup. | The ecommerce email and SMS platform with deep Shopify integration. |
| Pricing | Free; 10% of paid subscriptions | Free to 250 contacts; from $20/mo |
| Free tier | Yes | Yes |
| Best for | Writers monetizing directly with subscriptions | Online stores that live on flows and segments |
| Category | Email Marketing | Email Marketing |
| Website | substack.com | klaviyo.com |
Substack details Klaviyo details
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