
Postmark
MailChimp
Brevo
Resend
Mailjet
MailerLite
Amazon SES
A set of powerful APIs that enable you to send, receive and track email from your app effortlessly whether you use Python, Ruby, PHP, C#, Node.js or Java.

The modern platform for creating, sharing, and collaborating on AI prompts. Advanced version control and real-time testing.

Which is more popular?
Based on our record, Mailgun seems to be more popular. It has been mentioned 11 times since March 2021.
Website, pricing, platforms and company facts side by side.
|
|
|
|
|---|---|---|
| Website | mailgun.com | diffyn.com |
| Pricing | ||
| Platforms | — | |
| Company | Startup from the United States | — |
| Listed in |
What each product offers, as listed by its team.


Possible disadvantages
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
Introducing the new Mailgun
More videos
The Ultimate Prompt Tool for Creators – Visualize & Organize with Diffyn
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing Mailgun and Diffyn.
Diffyn's answer:
Addresses workflow and change management on LLM prompts, provide teams with traceability and visualization of tests across multiple models, provide deeper understading into efficiency of these prompts.
Diffyn's answer:
Diffyn is the platform that specializes on both change management and multi-model analysis.
Diffyn's answer:
React, Next.js, POSTGRESQL
Diffyn's answer:
Professionals incorporating LLMs or AI tools in their workflow and wants to keep track of changes and test their prompts.
Diffyn's answer:
I started working on Diffyn when I notice that prompting has become an essential part of work across many industries. While there are version control platofrms like github, they are not designed for just prompt management are can be overkill such applications, it is also not integrated natively with various LLMs and relevant tools for users to validate ideas and visualise results properly.
Share your experience with using Mailgun and Diffyn. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


Mailgun’s one dedicated IP address starts with the Foundation plan ($35) for 100k emails and up ($75). You might consider going for the growth plan ($80) already with 1000 email address validations included.
Mailgun SMTP is receiving 5 star reviews from people around the world. They are showering all the love, and support on Mailgun for their excellent service, features and usability.
Mailgun is an email infrastructure and transactional email platform built for developers that need a simple email API integration to send, receive, and track email with their app regardless of what programming...
We have no reviews of Diffyn yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.


Mailgun from Sinch is a well-established, developer-focused email service that's been in business since 2010. It powers email delivery for some large, well-known companies including Lyft, American Express, and Wikipedia. As a... - Source: dev.to / almost 3 years ago
In this Mailgun integration example we'll show how easy it is to create and deploy a complete serverless backend that integrates with the Mailgun SaaS API for sending email messages to your users. - Source: dev.to / over 3 years ago
Another solution to this problem is relaying through services which will do the heavy lifting for you (this was been discussed in the original thread, here and in the article I wrote). So far people have suggested - ImprovMX... - Source: Hacker News / about 4 years ago
Tracking Diffyn since Jun 2025.
When comparing Mailgun and Diffyn, you can also consider the following products.

Postmark is the easiest and most reliable way to be sure your important transactional emails get to the inbox. Simply & reliably parse recieved email to JSON for your webapp.
Compare Postmark to Mailgun or Diffyn:

MailChimp is the best way to design, send, and share email newsletters.
Compare MailChimp to Mailgun or Diffyn:

Innovative online Email Marketing solution to manage your contacts, create & send your newsletters and track your results. More than 80 000 clients. Best prices and attractive features.
Compare Brevo to Mailgun or Diffyn:


All-in-one email service provider that provides maximum insight and deliverability results for both marketing and transactional emails.
Compare Mailjet to Mailgun or Diffyn:

Affordable Email Marketing Software. Get all features (Segmentation, Automation, A/B testing) for up to 1,000 subscribers & send unlimited emails for free!
Compare MailerLite to Mailgun or Diffyn: