---
title: "Transactional Email API Comparison 2026 | Prontuno"
description: "Compare Prontuno with Postmark, Resend, SendGrid, Mailgun, Amazon SES, and Cloudflare on price, message history, and sending domains."
image: "https://prontuno.com/wp-content/uploads/2026/02/prontuno-og-image.png"
---

Comparisons

# Transactional email API comparison

Pricing and features change often. The table below shows how many emails each provider sends for $99 a month on its best published plan, using figures checked on September 26, 2026. Each comparison also notes where the competitor is the better choice.

[Compare by provider](#compare-providers)

[Try your own budget](https://prontuno.com/pricing/#comparison-heading)

| Provider | Emails for $99 a month | Message history |
| --- | --- | --- |
| [Amazon SES](https://prontuno.com/compare/prontuno-vs-amazon-ses/) | 618,750 | Events published to other AWS services |
| Prontuno | 500,000 | 30 days |
| [Cloudflare Email Service](https://prontuno.com/compare/prontuno-vs-cloudflare/) | 271,000 | Metrics and alerts in the Cloudflare dashboard |
| [Resend](https://prontuno.com/compare/prontuno-vs-resend/) | 171,000 | 30 days on Free, varies on paid plans |
| [SendGrid](https://prontuno.com/compare/prontuno-vs-sendgrid/) | 171,000 | 3 days on Essentials, 7 days on Pro |
| [Mailgun](https://prontuno.com/compare/prontuno-vs-mailgun/) | 121,000 | 1 day on Basic, 5 days on Foundation, 30 days on Scale |
| [Postmark](https://prontuno.com/compare/prontuno-vs-postmark/) | 79,000 | 45 days, with longer retention as an add-on |

- Postmark Best for Teams that want inbound processing, stored templates, and transactional and broadcast mail in one account. Emails for $99 79,000 [Head to head: Prontuno vs Postmark](https://prontuno.com/compare/prontuno-vs-postmark/) [Alternatives to Postmark](https://prontuno.com/compare/postmark-alternatives/)
- Resend Best for Developers who build email with React Email and want SDKs, inbound email, and marketing from one vendor. Emails for $99 171,000 [Head to head: Prontuno vs Resend](https://prontuno.com/compare/prontuno-vs-resend/) [Alternatives to Resend](https://prontuno.com/compare/resend-alternatives/)
- SendGrid Best for Larger teams that want transactional and marketing email, validation, and subusers from one established vendor. Emails for $99 171,000 [Head to head: Prontuno vs SendGrid](https://prontuno.com/compare/prontuno-vs-sendgrid/) [Alternatives to SendGrid](https://prontuno.com/compare/sendgrid-alternatives/)
- Mailgun Best for Teams that route inbound email and validate addresses, and want live support on higher plans. Emails for $99 121,000 [Head to head: Prontuno vs Mailgun](https://prontuno.com/compare/prontuno-vs-mailgun/) [Alternatives to Mailgun](https://prontuno.com/compare/mailgun-alternatives/)
- Amazon SES Best for Teams already on AWS that want the lowest price per email and can build their own event handling. Emails for $99 618,750 [Head to head: Prontuno vs Amazon SES](https://prontuno.com/compare/prontuno-vs-amazon-ses/) [Alternatives to Amazon SES](https://prontuno.com/compare/amazon-ses-alternatives/)
- Cloudflare Email Service Best for Apps already built on Cloudflare Workers with modest sending volume. Emails for $99 271,000 [Head to head: Prontuno vs Cloudflare Email Service](https://prontuno.com/compare/prontuno-vs-cloudflare/) [Alternatives to Cloudflare Email Service](https://prontuno.com/compare/cloudflare-alternatives/)

Sending volumes use each provider’s best published plan for the budget, counted per recipient. Details checked September 26, 2026.

FAQ

## Questions about comparing providers

Which transactional email provider gives the most emails for the money?

In this comparison, Amazon SES sends the most emails for $99 a month, but it requires more setup and you build your own event handling. Prontuno sends the most per dollar among the providers that include event logs and a managed dashboard.

How often are prices checked?

The figures on this page were checked on September 26, 2026. Check the provider’s pricing page for current rates.

Request access

## Tell us what you send. We will take it from there.

We review every application within 24 hours to keep our sending pool clean. Approved accounts start with 10,000 free credits.

[Request access](https://app.prontuno.com/get-started/)

[Talk to us](https://prontuno.com/contact/)