Resend

What Resend is

An email platform aimed at the person writing the code rather than the marketing team. You get an API and SMTP, SDKs for common languages, a test mode for simulating events, and webhooks that tell you what happened to each message.

The stated focus is getting transactional mail into the inbox rather than the spam folder.

What you can do with it

• Send transactional email through an API or SMTP
• Trigger registration, verification and reset mail
• Send product notifications and marketing broadcasts
• Simulate delivery events in test mode
• Receive delivery, open, click and bounce webhooks
• Manage contacts and review broadcast analytics
• Integrate from Node.js, Python, Go and other languages

Who it is for

• Developers building email into a product
• SaaS and startup teams
• Technical product managers
• Teams replacing a fragile in-house mail setup

What to watch out for

• Deliverability depends on your sending domain setup, not only the provider
• Transactional and marketing mail have different consent rules; keep them separate
• Webhooks and event handling need proper retry logic on your side
• Check volume limits and what happens when you exceed them