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I’ve been through the email tool graveyard. Mailchimp, SendGrid, ConvertKit, Beehiiv — I’ve tried them all. Most of them either charge you for features you don’t need or make you feel like you need a computer science degree to send a welcome email. So when I heard about Resend, I was skeptical. Another email tool? Really?
But Resend is different. Not because it’s better at everything — it’s not. It’s different because it decided to do one thing really well instead of doing everything poorly.
What is Resend?
Resend is an email API. That means it’s the engine that sends emails — not the dashboard where you design pretty newsletters. Think of it like this: Mailchimp is the restaurant. Resend is the kitchen.
If you’re building a web app, a SaaS product, or any tool that needs to send emails (password resets, order confirmations, notifications), Resend handles the actual sending. You connect it to your app with a few lines of code, and it delivers the emails.
The key difference from tools like Mailchimp: Resend is built for developers first. The API is clean. The documentation is clear. The dashboard doesn’t make you want to throw your laptop out the window.
Why developers love it
I’m not a developer, but I asked three people who build SaaS products for a living. All three said the same thing: “It just works.”
Here’s what makes Resend stand out:
React Email integration. You can build email templates using React components — the same way you build web pages. If you already use Next.js or React, this is huge. No more wrestling with HTML email tables from 2005.
One endpoint, one SDK. The API has one main endpoint for sending. Compare that to SendGrid’s sprawling documentation that reads like a legal contract. Resend’s docs fit on one page.
TypeScript support. If you use TypeScript, you get autocomplete and type checking for every API call. No more guessing what parameters an endpoint expects.
No surprise bills. When you hit your monthly sending limit, Resend pauses. It doesn’t auto-charge you overage fees. I’ve heard horror stories of developers getting $500 bills because a loop sent 10x their intended volume. Resend prevents that.
Pricing that actually makes sense
| Plan | Price | Emails/Month | Best For |
|---|---|---|---|
| Free | $0 | 3,000 | Development, staging, small projects |
| Pro | $20/mo | 50,000 | Growing apps, small businesses |
| Scale | $90/mo | 100,000 | High-volume production |
| Enterprise | Custom | Custom | Large organizations |
The free tier is genuinely useful — not a teaser that forces you to upgrade after day three. Three thousand emails per month covers most development and staging environments, plus small production apps.
At $20/month for 50K emails, Resend is competitive with SendGrid Essentials ($19.95) and significantly cheaper than Postmark ($55 for 50K). If you’re sending transactional emails — not marketing campaigns — this pricing is hard to beat.
Where Resend falls short
I promised an honest review, so here’s where Resend isn’t the right choice:
No marketing tools. Resend is an API for sending emails. It doesn’t have a campaign builder, audience segmentation, or A/B testing. If you want to design pretty newsletters and track open rates across campaigns, you need a tool like Mailchimp or Beehiiv.
Newer service. Resend launched in 2023. That’s young compared to Postmark (2012) or SendGrid (2009). For mission-critical enterprise email where you need years of track record, that matters.
Fewer integrations. SendGrid has native plugins for every CMS, CRM, and marketing platform under the sun. Resend works great via API but doesn’t have pre-built integrations for everything.
Deliverability data. Postmark publishes real-time deliverability stats. SendGrid has years of third-party benchmarking. Resend’s deliverability track record is shorter, though early results are positive.
Who should use Resend
Use Resend if:
- You’re building a web app or SaaS product and need transactional emails
- You use React, Next.js, or TypeScript
- You want a clean API without enterprise complexity
- You need a generous free tier for development
- You’re tired of SendGrid’s documentation
Don’t use Resend if:
- You need marketing email campaigns with visual builders
- You require enterprise-grade vendor track records
- You need native integrations with specific CRM or marketing platforms
- You’re sending 500K+ emails per month (SES or SendGrid volume pricing wins)
How to get started in 5 minutes
If you want to try Resend, here’s the fastest path:
- Sign up at resend.com — free tier, no credit card
- Verify your domain — add a few DNS records (they walk you through it)
- Get your API key — one click in the dashboard
- Send your first email — use their SDK or any no-code tool that supports webhooks
The whole process takes about five minutes if your domain is already set up. If you’re using Make or Zapier, you can connect Resend as an action without writing any code.
The bottom line
Resend isn’t trying to be everything. It’s trying to be the best at sending emails — and it’s doing a good job. If you need a modern, developer-friendly email API with a generous free tier, Resend is worth serious consideration.
If you need marketing campaigns, visual builders, and audience management, look elsewhere. Resend is the kitchen, not the restaurant. Use it for what it’s built for, and it won’t let you down.
Already using email tools? See how Make and Zapier compare for connecting your email to the rest of your stack. Or check out the 7 AI tools I’d learn first if you’re building your first workflow.