CIREZZ · AI VISIBILITY MONITORING
8 QUERIES · CHATGPT · APRIL 2026

How Resend appears
in ChatGPT.

We ran 8 queries that developers type into ChatGPT when choosing an email API or solving email-related problems. Resend has strong presence in Next.js and DX queries. The gaps are in serverless, webhooks, and Vercel-specific queries where Resend's features aren't surfacing yet.

8
Queries tested
1
Present
3
Partial
4
Absent
// QUERY RESULTS
we're using SendGrid and deliverability has been garbage, what are people switching to 4th
Mailgun pricing keeps changing and the docs are a mess, is there a simpler email API 2nd
solo founder, Next.js app, need transactional email working in 30 minutes 1st
Nodemailer keeps timing out in Vercel serverless functions, what's a better option Absent
sending email attachments from Next.js API route, base64 keeps failing silently Brief
how to set up real-time email event tracking without polling, bounces, opens, clicks Absent
Next.js app on Vercel hits cold start issues when sending email from API routes Absent
is it worth building email templates in React instead of HTML tables Absent
Cirezz
// WHERE RESEND IS STRONG

When buyers mention Next.js, React, or developer experience, ChatGPT positions Resend as a top pick. In the solo founder query, ChatGPT said "Use Resend and don't look back" and included a full implementation guide. In the Mailgun frustration query, Resend was described as having the "least number of clicks from 0 to deployed email."

// WHERE THERE'S A GAP

Resend is absent from both Vercel-specific queries, the webhook query, and the React Email query. ChatGPT recommends SendGrid and Postmark for serverless email on Vercel, even though Resend has a direct partnership with Vercel and a testimonial from Guillermo Rauch on the homepage. React Email is recommended by name but ChatGPT doesn't connect it to Resend as a product.

// SHARE OF VOICE ACROSS 8 QUERIES
Postmark
7/8
SendGrid
6/8
Mailgun
5/8
Amazon SES
5/8
Resend
4/8
MailerSend
2/8
Nodemailer
2/8
Cirezz
CHATGPT · SELECTED RESPONSES

What ChatGPT actually
says to your buyers.

Strong presence
solo founder, Next.js app, need transactional email working in 30 minutes 1st

Resend ranked #1. Described as "by far the fastest to get running in a modern Next.js app" with native React email support and a clean API. ChatGPT's verdict: "Use Resend and don't look back." Full code examples and a 30-minute setup plan included.

Resend dominates developer-experience queries. When the buyer mentions Next.js, speed, or modern stack, Resend is the default answer.

Features not surfacing
Nodemailer keeps timing out in Vercel serverless functions, what's a better option Absent

ChatGPT recommended SendGrid, Postmark, and Mailgun as HTTP API-based alternatives to Nodemailer for serverless environments. Code examples provided for all three.

This is the exact moment a developer discovers they need an API like Resend. Nodemailer doesn't work in serverless. The buyer is ready to switch. But ChatGPT sends them to SendGrid and Postmark instead.

Next.js app on Vercel hits cold start issues when sending email from API routes Absent

ChatGPT recommended SendGrid and Postmark combined with Edge Functions or a background queue to eliminate cold start latency.

Resend has a direct partnership with Vercel and a testimonial from Vercel's CEO on the homepage. Yet ChatGPT doesn't associate Resend with Vercel-specific email problems. Likely a content gap: there's no indexed content connecting Resend to Vercel cold start solutions.

is it worth building email templates in React instead of HTML tables Absent

ChatGPT recommended React Email and MJML as modern templating tools that compile to table-based HTML. Testing with Litmus and Email on Acid recommended for cross-client compatibility.

React Email is Resend's own open source project, but ChatGPT doesn't connect the two. The buyer discovers React Email, uses it, and never learns that the same team built a full email API around it.

Cirezz