Resend vs MailerSend
React Email-first sending versus a modern API with visual template tooling.
What matters for SaaS product teams
A SaaS product sends on behalf of its customers, so the deciding factors are tenant isolation, whether suppressions can be scoped rather than global, and whether support can answer why one specific account did not receive one specific email. Lifecycle automation and transactional sending usually need to coexist.
| Priority | Resend | MailerSend |
|---|---|---|
| Multi-tenant | No | Yes |
| Event stream | Yes | Yes |
| Suppressions API | Yes | Yes |
| Operating since | 2023 | 2020 |
| Scheduling | Yes | Yes |
| Best published rate per 1,000 | $0.35 | Tiers not published in comparable form |
| 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. |
| Webhooks | Yes | Yes |
| Starts at | $20/mo for 50,000 emails | $7/mo for 5,000 emails |
For a multi-tenant SaaS product running trial expiry notices, dunning, onboarding sequences, and per-tenant transactional mail, MailerSend takes every priority that separates them here (multi-tenant support and operating track record), while Resend matches it on the rest. On entry price, Resend offers $20/mo for 50,000 emails against $7/mo for 5,000 emails from MailerSend. That ordering reflects this audience. Weigh the same table differently and the answer changes.
Side by side
| Feature | Resend | MailerSend |
|---|---|---|
| Multi-tenant | No | 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. |
| Webhooks | Yes | Yes |
| 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. |
| Free tier | 3,000/mo permanent, capped at 100/day, one domain | 500/mo permanent |
| 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 |
| 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