Resend vs MailerSend
React Email-first sending versus a modern API with visual template tooling.
What matters for growth and lifecycle teams
Growth work lives or dies on targeting and measurement. What matters is whether behavioral triggers can be built without engineering time, whether the event stream supports attribution past the open, and whether deliverability holds when broadcast volume shares a reputation with product email.
| Priority | Resend | MailerSend |
|---|---|---|
| Scheduling | Yes | Yes |
| Event stream | Yes | Yes |
| Deliverability | Acceptable, but the deliverability track record is shorter than Postmark or SendGrid. Independent inbox-placement studies vary. Dedicated IPs are available on higher tiers. | Good and steadily improving; reputation managed via dedicated IP options on paid plans. |
| Operating since | 2023 | 2020 |
| Suppressions API | Yes | Yes |
| Best published rate per 1,000 | $0.35 | Tiers not published in comparable form |
| Multi-tenant | No | Yes |
| Free tier | 3,000/mo permanent, capped at 100/day, one domain | 500/mo permanent |
| Starts at | $20/mo for 50,000 emails | $7/mo for 5,000 emails |
For lifecycle and activation work running behavior-triggered journeys, broadcasts, and winback campaigns measured on revenue, MailerSend takes every priority that separates them here (operating track record and multi-tenant support), while Resend matches it on the rest. On free tier, Resend offers 3,000/mo permanent, capped at 100/day, one domain against 500/mo permanent from MailerSend. That ordering reflects this audience. Weigh the same table differently and the answer changes.
Side by side
| Feature | Resend | MailerSend |
|---|---|---|
| Deliverability | Acceptable, but the deliverability track record is shorter than Postmark or SendGrid. Independent inbox-placement studies vary. Dedicated IPs are available on higher tiers. | Good and steadily improving; reputation managed via dedicated IP options on paid plans. |
| Multi-tenant | No | Yes |
| Free tier | 3,000/mo permanent, capped at 100/day, one domain | 500/mo permanent |
| Starts at | $20/mo for 50,000 emails | $7/mo for 5,000 emails |
| Tagline | Email API tightly coupled to React Email. | Modern transactional API with a clean UI. |
| Pricing model | tiered | tiered |
| API | Yes | Yes |
| SMTP | Yes | Yes |
| SDKs | node, python, go, ruby, php, rust, java, elixir, cli | node, python, go, ruby, php |
| Templates | react-email | rich |
| React Email | Yes | No |
| Webhooks | Yes | Yes |
| Inbound | Yes | Yes |
| Idempotency | Yes | No |
| Dedicated IP | Yes | Yes |
| DX score | 8/10 | 8/10 |
| Best for | Early-stage React or Next.js product teams sending under 50k/mo. | Teams that want both API and visual template editing. |
Resend
- ›Idiomatic SDKs across major languages
- ›React Email integration is the smoothest of any provider
- ›Idempotency keys supported
- ›Clean dashboard and event log
- ›Volume pricing is significantly higher than AWS SES at large volumes
- ›Founded 2023, so deliverability track record and incident history are still building
- ›No drag-and-drop template editor; non-React stacks get a thinner experience
- ›Free tier is capped at 100 sends a day, so a 3,000/mo allowance cannot absorb a launch spike
- ›January 2024 breach exposed email metadata, contacts, and encrypted API tokens for all users; message bodies were not reached
- ›Status page logged roughly ten incidents in the three weeks to 2026-08-01, mostly outside the sending path: dashboard, webhooks, domain verification, and automations
- ›Single-region historically; multi-region setup is newer
- ›Smaller support footprint than Twilio SendGrid or Sinch Mailgun
MailerSend
- ›Drag-and-drop templates plus API
- ›Inbound routing supported
- ›Sub-accounts for agencies
- ›Smaller SDK footprint than SendGrid
- ›Brand and ecosystem less recognized than older providers