I spent the last year sending production transactional email through both Resend and SendGrid, on different projects, and kept notes as I went. The short version: Resend is what you would build if you designed an email API today, and SendGrid is what happens when an email API grows old enough to have enterprise customers, legacy decisions, and a thousand settings. Both are good. They are good in very different ways.
Getting started: no contest
Resend’s onboarding is the smoothest I have seen in this category. Sign up, verify your domain by pasting a few DNS records, generate an API key, and send. The Node SDK reads like the rest of modern JavaScript:
import { Resend } from 'resend';
const resend = new Resend(process.env.RESEND_API_KEY);
await resend.emails.send({
from: '[email protected]',
to: '[email protected]',
subject: 'Your download is ready',
html: '<p>Click away.</p>',
});SendGrid works too, but the first-hour experience is heavier: more concepts (sender identity versus domain authentication, subusers, IP pools), a dashboard with a decade of accumulated options, and error messages that occasionally assume you already know the terminology.
Deliverability and scale
This is where SendGrid’s age becomes an asset. Dedicated IPs with scheduled warmup, IP pools, subuser accounts for isolating different products, mature inbound parsing, and a reputation dashboard that has clearly been refined by millions of sends. When something goes wrong at scale, SendGrid has the tooling to diagnose it.
Resend handles deliverability well for the volumes most products actually send, and its broadcast and batch features have improved quickly. But if you are pushing millions of messages a month, managing IP reputation across several products, or you need the kind of enterprise controls that come from years of feedback, SendGrid is still the safer infrastructure bet.
Pricing shape
Resend’s free tier is genuinely useful for development and small projects, and its paid tiers scale by monthly volume in a way that is easy to reason about. SendGrid’s free tier has been trimmed over the years, and paid plans are priced similarly by volume, though the jumps between tiers are steeper in the mid-range. Check both against your real numbers — list growth and volume change the answer fast.
Developer experience beyond the first send
Templates are the quiet differentiator. Resend ships with React Email, which lets you build email templates as components with proper version control — a real pleasure if your team already lives in React. SendGrid’s dynamic templates use Handlebars in a visual editor; powerful, but debugging a broken template variable through a web UI is less fun than reading a compile error.
Webhooks are strong on both. SendGrid’s signed event webhooks are more mature; Resend’s are simpler to wire up and cover the events most apps care about.
My verdict
For a new product, an API-first team, or anything where email is important but not enormous, start with Resend — the speed of iteration and the developer experience are worth it. For high volume, multi-product setups, enterprise compliance needs, or where you want the deepest deliverability toolbox, SendGrid earns its keep. And if you came here wondering whether the older platform is still credible: it is.
Where to start
If you pick Resend, follow our Resend API tutorial to send your first message in about ten minutes. If you pick SendGrid, our SendGrid walkthrough covers the setup steps people usually get wrong. Before either, make sure your SPF, DKIM, and DMARC records are correct with our plain-English guide.