Choosing between Substack and Postmark comes down to your specific use case. Substack is built for writers monetising directly from subscribers, while Postmark targets developers who need fast, reliable transactional email.
| Feature | Postmark | Substack |
|---|---|---|
| 💰 Pricing | ||
| Free Plan | ✗ | ✓ |
| Starting Price | $15/mo | Free |
| Free Trial | ✓ | ✗ |
| ⚙️ Features | ||
| Email Automation | ✗ | ✗ |
| Visual Workflow Builder | ✗ | ✗ |
| Landing Pages | ✗ | ✗ |
| Built-in CRM | ✗ | ✗ |
| SMS Marketing | ✗ | ✗ |
| A/B Testing | ✗ | ✗ |
| E-commerce Integration | ✗ | ✗ |
| Transactional Email | ✓ | ✗ |
| Remove Branding | ✗ | ✗ |
| 🤖 AI Features | ||
| AI Subject Lines | ✗ | ✗ |
| AI Send-Time Optimisation | ✗ | ✗ |
| 🛎 Support | ||
| Email Support | ✓ | ✓ |
| Live Chat | ✗ | ✗ |
| Phone Support | ✗ | ✗ |
Postmark is best for developers who need fast, reliable transactional email.
Try Postmark Free →It depends on your use case. Substack wins for writers monetising directly from subscribers, while Postmark is stronger for developers who need fast, reliable transactional email.
Substack starts at a lower price point. Pricing scales with subscriber count so total cost depends on your list size.
Yes, switching is possible. Most platforms support CSV import/export. Plan time to recreate automations and templates.