Resend vs SendGrid
One was built for developers in 2023. One has been the default since 2009 and shows it. The answer is obvious if you are starting fresh.
Resend
Resend is what email APIs should have been from the start: clean docs, React Email support, modern SDK, and a free tier that does not require a credit card. SendGrid is the incumbent but showing its age with complex UI and a spam reputation that hurts deliverability on shared plans.
Resend Is the Modern Default
Resend launched in 2023 and immediately became the developer-favorite email API. The API is clean, the docs are excellent, and it ships with React Email support. Free tier is 3,000 emails per month, 100 per day, no credit card required.
For new projects, Resend is the obvious choice.
SendGrid's Legacy Problem
SendGrid has been around since 2009. Owned by Twilio now. The bigger issue is deliverability: SendGrid's shared IP pools appear on spam lists. If you are on a free or low-tier plan, your emails share infrastructure with everyone else including spammers. Getting your own dedicated IP costs extra.
The UI is notoriously complex. The API documentation is extensive but hard to navigate.
When SendGrid Still Makes Sense
If you are an enterprise with existing SendGrid contracts and dedicated IPs, the switching cost is not worth it.
SendGrid's marketing email features are more mature: campaigns, contact management, segmentation. If you need combined transactional plus marketing email, SendGrid or Mailchimp might fit better.
For pure transactional email on a new project: Resend.
Quick Comparison
| Factor | Resend | SendGrid |
|---|---|---|
| Developer Experience | Excellent, modern API | Complex, legacy patterns |
| Free Tier | 3,000 per month, no card | 100 per day, requires card |
| React Email | First-class support | Third-party only |
| Deliverability | Good and improving | Better with dedicated IPs |
| Marketing Features | Transactional focused | Full marketing suite |
| Pricing Transparency | Simple and public | Complex, sales-driven at scale |
| Maturity | 2023, newer | 2009, battle-tested |
The Verdict
Use Resend if: You are building anything new. Resend is the right default for transactional email in 2024 and beyond.
Use SendGrid if: You are a large enterprise with existing contracts, dedicated IPs, and a team managing email campaigns.
Consider: Postmark is the third option nobody mentions: excellent deliverability, developer-focused, and more mature than Resend. Worth it if deliverability is critical.
Resend is what email APIs should have been from the start: clean docs, React Email support, modern SDK, and a free tier that does not require a credit card. SendGrid is the incumbent but showing its age with complex UI and a spam reputation that hurts deliverability on shared plans.
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