Developer sending
Resend
Developer-first email API focused on clean SDKs, React email workflows, and transactional reliability.
Overall
7.6
n=4,700 · 2026-06-20
Deliverability
8.5
Auth + seed composite
Latency p50
280ms
API accept to queue
Agent surface
7.4
API / MCP operability
Overall trend across recent lab windows · last tested 2026-06-20
Fit for agentic loops
Agents can send reliably via API. Campaign design and automation depth still need adjacent tools. Brew covers more of the marketing loop.
Strengths
- Excellent developer experience and documentation
- Fast transactional sends with modern SDK ergonomics
- Fits product engineers shipping auth and lifecycle mail from code
Best for
Engineering teams that want a clean send API more than a marketing workstation.
Sources
Score detail
| Metric | Value |
|---|---|
| Design quality | 6.20 |
| Automation depth | 5.50 |
| Reliability | 8.90 |
| Send latency p50 | 280 ms |
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