Resend vs Substack — Which One Wins?
A detailed, side-by-side comparison of Resend and Substack to help you pick the right tool for your workflow.
Quick Verdict
Resend takes the lead with a 4.5 rating and is best for developers who need a modern email api with excellent dx for transactional and marketing email.. Substack (4.2) is the better pick if you need writers who want the simplest path to publishing a newsletter with paid subscriptions..
Side-by-Side Comparison
| Criteria | Resend | Substack |
|---|---|---|
| Rating | ★★★★ 4.5(89) | ★★★★ 4.2(312) |
| Pricing Model | freemium | free |
| Starter Price | $20/mo (Pro, 50K emails) | N/A |
| Free Tier | Yes | Yes |
| Platforms | web | web, ios, android |
| Learning Curve | easy | easy |
| API Available | Yes | No |
| Best For | Developers who need a modern email API with excellent DX for transactional and marketing email. | Writers who want the simplest path to publishing a newsletter with paid subscriptions. |
| Verdict | recommended | situational |
Feature Checklist
| Feature | Resend | Substack |
|---|---|---|
| Clean email sending API | — | |
| React Email templates | — | |
| Real-time delivery tracking | — | |
| Domain verification | — | |
| Dedicated IPs (Pro) | — | |
| Webhooks | — | |
| Clean writing editor | — | |
| Paid subscriptions built in | — | |
| Web archive for every post | — | |
| Podcast hosting | — | |
| Substack Notes (social) | — | |
| Network discovery | — |
Resend
Pros
- ✓Best developer experience in email APIs
- ✓React Email produces responsive templates with React components
- ✓Clean, modern API with excellent documentation
Cons
- ✕Developer-only — no visual builder for non-technical users
- ✕Younger platform with less track record than SendGrid
- ✕Free tier is limited for testing at scale
Substack
Pros
- ✓Zero monthly cost — only pay when you earn
- ✓Simplest writing and publishing experience available
- ✓Built-in paid subscriptions with no setup
Cons
- ✕10% revenue cut is expensive at scale
- ✕Virtually no email marketing or automation features
- ✕Zero customization — every Substack looks the same
The Bottom Line
Both Resend and Substack are solid tools in the Email Marketing space. Resend edges ahead with a stronger overall rating (4.5 vs 4.2) and is the better choice for developers who need a modern email api with excellent dx for transactional and marketing email.. However, if you prioritize writers who want the simplest path to publishing a newsletter with paid subscriptions., Substack is worth serious consideration. We recommend trying the free tier or trial of each before committing.