Transactional email APIs · #15 of 16 · ↑ Courier · ↓ Plunk
SparkPost
SparkPost ranks #15 of 16 in transactional email apis in the week of 28 September 2026, with a visibility score of 2 across ChatGPT, Claude, Gemini and Perplexity. It was named in 5% of the answers we sampled.
sampled: 3 of 4 assistants this week
SparkPost barely registers with AI assistants in the Transactional email APIs category, showing up in just 3 of 62 answers. Claude gives it a score of 7 out of 100, while ChatGPT and Perplexity both score it 0. When it does get a mention, it's a single nod in questions about high-volume low-cost providers, deliverability, and general "best transactional email API" roundups, each named in just 1 of 3 or 4 answers. It never comes up for webhooks, cheap scaling, open-source options, Next.js or serverless setups, or developer-focused picks. Overall score: 2 out of 100.
this is mine claim it, free, forever. We also check whether ChatGPT and Claude can read sparkpost.com.
Who's talking about you
| assistant | score | named in, this week | usual spot, this week |
|---|---|---|---|
| ChatGPT | 0 | 0% of answers | |
| Claude | 7 | 15% of answers | #8.3 |
| Gemini | not sampled this week | ||
| Perplexity | 0 | 0% of answers |
Questions you win
| question | named in | best spot |
|---|---|---|
| Which email API has the best deliverability? | 1 of 3 | #6 |
| What's the best transactional email provider for high volume at low cost? | 1 of 3 | #7 |
| What are the best transactional email APIs? | 1 of 4 | #12 |
Questions you lose
| question | who got named instead |
|---|---|
| What's the best email API for developers? | Resend, Postmark, Mailgun |
| What's the best alternative to SendGrid? | Postmark, Amazon SES, Resend |
| What's the cheapest way to send transactional email at scale? | Amazon SES, MailerSend, Elastic Email |
| Which transactional email service is best for a startup? | Postmark, Resend, Amazon SES |
| What's the best email API in 2026? | Resend, Postmark, Amazon SES |
| Which email API has the best free tier? | Brevo, Resend, Mailjet |
| What's the best SMTP service for an app? | Postmark, Resend, Amazon SES |
| Which transactional email provider has the best developer experience? | Resend, Postmark, SendGrid |
| What's the best way to send password reset and verification emails from my app? | Postmark, Amazon SES, Resend |
| What's the best email API for a Next.js or serverless app? | Resend, Postmark, SendGrid |
| What's the best email API with React or JSX email templates? | Resend, Postmark |
| What's the best open-source or self-hosted transactional email server? | Postal |
| What's the best tool to test and preview emails before sending? | nobody in particular |
| What's the best email service for sending receipts and order confirmations? | Postmark, Resend, Amazon SES |
| What's the best email API with webhooks for bounces and opens? | Postmark, Resend, Mailgun |
| What's the best email API that also handles marketing campaigns? | SendGrid, Brevo |
| What's the best email API for a European company that needs EU data hosting? | Brevo, Mailgun, Mailjet |
Assistants cited 10 pages for questions in this category that name your rivals and not you. Claim to see them. See all sources for Transactional email APIs.
In their words
- Claude“| SparkPost / Sinch | Custom | Enterprise-scale senders (millions/month) |”
- Claude“Mailgun / SparkPost — Solid middle ground, good analytics and ISP relationships, decent for mixed transactional and marketing sending.”
- Claude“SparkPost / Bird — built for very high volume with strong analytics; more enterprise-oriented.”
Closest rivals
- SparkPost vs Courier2
- SparkPost vs Plunk1
- SparkPost vs Scaleway TEM3
- SparkPost vs Loops4
- SparkPost vs Elastic Email5
All SparkPost alternatives · Full Transactional email APIs leaderboard · Sources