Resend + automation, in one platform
Stack0 matches Resend's developer experience and adds what they're missing: email sequences, event triggers, and visual automation. No third-party tools needed.
Feature comparison
See how Stack0 Email compares to Resend.
| Feature | Stack0 | Resend |
|---|---|---|
| Core Features | ||
| Transactional email | ||
| Marketing campaigns (broadcasts) | ||
| Audience/contact management | ||
| Template management | ||
| Inbound email | ||
| Automation | ||
| Email sequences/drips | ||
| Event-triggered emails | ||
| Visual automation builder | ||
| Conditional branching | ||
| A/B testing in sequences | ||
| Developer Experience | ||
| TypeScript SDK | ||
| Multi-language SDKs | 10+ languages | |
| React Email support | ||
| Webhooks | ||
| API-first design | ||
| Sandbox/test mode | ||
| Platform Integration | ||
| CDN integration | ||
| Screenshot API | ||
| AI extraction | ||
| Single unified SDK | ||
| Analytics | ||
| Open tracking | ||
| Click tracking | ||
| Campaign analytics | ||
| Sequence analytics | ||
| Pricing | ||
| Free tier | $5 credits | 3K emails/mo |
| Usage-based pricing | ||
| No per-seat pricing | ||
Pricing comparison
Simple, usage-based pricing with no hidden fees.
Stack0
$5/mo minimum, includes automation
Resend
$20/mo Pro plan, 50K included
Why developers switch
Built-in email sequences
Resend requires third-party tools like Resendly for drip campaigns. Stack0 has sequences, timers, and branching built in.
Event-driven automation
Trigger sequences from custom events like purchases or signups. Build sophisticated automation without external workflow tools.
Unified developer platform
One SDK for email, CDN, screenshots, and AI extraction. Fewer tools to manage, fewer integrations to maintain.
Visual automation builder
Design complex email flows with conditional branching, A/B testing, and filters. No code required for marketing teams.
Similar API, easy migration
If you know Resend's API, you'll feel at home. Stack0 uses nearly identical patterns for transactional email.
Lower cost at scale
$0.50 per 1,000 emails vs $0.90/1K on Resend. At 100K emails/month, save $40+ compared to Resend Pro.
Frequently asked questions
How similar is the API to Resend?
Very similar for transactional email. Both use TypeScript-first design with intuitive method names. The main difference is Stack0 adds automation features like sequences, event triggers, and visual workflow builders that Resend lacks.
Can I migrate my templates from Resend?
Yes. Stack0 supports the same React Email components. You can copy your templates over with minimal changes.
Does Stack0 support the same webhooks?
Yes, and more. Stack0 supports delivery, bounce, open, and click webhooks like Resend, plus additional events for sequences and automation.
What about deliverability?
Stack0 uses the same email authentication standards (SPF, DKIM, DMARC) and maintains high sender reputation. Deliverability is comparable to Resend.
How do the free tiers compare?
Resend offers 3,000 emails/month (100/day limit). Stack0 offers $5 in credits covering ~10,000 emails with no daily limit. Stack0's free tier is more generous for testing.
Does Resend have marketing email features?
Yes, Resend added Broadcasts for marketing campaigns. However, they don't have email sequences, event triggers, or automation workflows. You'd need a third-party tool like Resendly for drip campaigns.
What about multi-language SDKs?
Resend offers SDKs in 10+ languages (Node, Python, Ruby, PHP, Go, etc.). Stack0 currently offers TypeScript/JavaScript only. If you need other languages, you can use our REST API directly.
Can I use Stack0 just for email?
Absolutely. While Stack0 offers CDN, screenshots, and AI extraction, you can use just the email features. You only pay for what you use.
Ready to switch from Resend?
Get started in minutes with $5 free credits. No credit card required.