// scorecard · 71/100
verified 1mo agoAgent-readiness35/35
Agent registration (auth.md)9/9
Public API5/5
OpenAPI spec9/9
MCP server9/9
llms.txt3/3
Reliability & performance0/15
Actively maintained—
Production-ready0/4
Updated recently—
Pricing12/13
Itemized public pricing6/6
Free tier / trial4/4
Free-tier generosity2/3
Docs & DX10/12
Docs quality6/8
Public API2/2
Quickstart / examples2/2
Security & compliance10/12
SOC 26/6
ISO 270010/2
GDPR2/2
Security / trust page2/2
Openness4/10
Open source0/6
Open / un-gated API4/4
Company maturity0/3
Company size—
Years operating—
// rankings · cost per standard workload
// overview
Resend is an email API for developers to send transactional and marketing emails at scale with SDKs in multiple languages. It includes test mode, modular webhooks for events like delivery/opens/bounces, a visual editor, contact management, broadcast analytics, and React Email template support.
Best for: Developers needing reliable transactional email delivery with modern DX
// pricing
Free tier · generosity 3/5
Includes: REST/SMTP/SDKs · basic deliverability · webhooks
Limits: 100 emails/day · 1 domain · 30 days retention · 1 webhook endpoint
Freefree
- 100 emails/day
- 1 custom domain
- REST API
- SDKs
- 30-day retention
- 1 webhook endpoint
Propaid
- unlimited emails
- 10 domains
- schedule/batch
- open+link tracking
- 10 webhooks
Scalepaid
- unlimited
- 1000 domains
- dedicated IP add-on
- flexible webhooks
Enterprisecustom
- flexible limits
- dedicated IPs
- SLA
- flexible everything
// security & compliance
✓ SOC 2✗ ISO 27001✓ GDPR✗ HIPAA
// features
- SDKs for Node.js/Python/Ruby/PHP/Go/Rust/Java/.NET/REST/SMTP
- Modular webhooks for delivery/open/bounce/click/complaint events
- Test mode for simulating events
- React Email component library for templates
- Contact management and broadcast analytics
- Custom domains, DKIM/SPF/DMARC, multi-region