Postmark
Email for web applications
Unspam.email
Email spam checker and newsletter heatmap prediction.
Updated February 2026
| Postmark | Unspam.email | |
|---|---|---|
| Rating | 5.0★ | 5.0★ |
| Reviews | 17 | 3 |
| Pros | 9 | 5 |
| FactScore™ | 62.8 | 30.1 |
FactScore™ Comparison
FactScore™ weighs both quality (rating) and popularity (reviews) for a fairer ranking than stars alone.
Pros & Cons
Only in Postmark — Pros
Reliable email delivery Fast performance Human support Transactional email Affordable pricing Email templates Excellent documentation Simple API Spam filterBoth tools — Pros
—Only in Unspam.email — Pros
Email deliverability improvement DNS setup assistance Inbox placement No account required Spam score analysisOnly in Postmark — Cons
—Both tools — Cons
—Only in Unspam.email — Cons
More test emailsDetails
| Postmark | Unspam.email | |
|---|---|---|
| Categories | Email clients, Email marketing | Email marketing, Testing and QA software |
| Platforms | Web · iOS | Web |
| Became Popular | July 23, 2014 | October 26, 2020 |
| Website | postmarkapp.com | unspam.email |
Who Should Pick Which?
Choose Postmark if...
- Reliable email delivery
- Fast performance
- Human support
Choose Unspam.email if...
- Email deliverability improvement
- DNS setup assistance
- Inbox placement
With a FactScore™ of 62.8 vs 30.1, Postmark leads in community reception. Postmark uniquely offers Reliable email delivery and Fast performance, while Unspam.email stands out for Email deliverability improvement and DNS setup assistance.
What Users Say
Postmark
We use Postmark to send emails and manage newsletters directly from BlogBowl. Big thanks to Postmark for their reliable API and top-notch deliverability, which makes sure your newsletters actually ...
We use Postmark not only for our emails, but also to power Ply's built-in dynamic email capabilities. It's reliable, well documented and most of all - comes with awesome human support.
Once you get familiar with Postmark's layouts and templates, the service is great for quickly creating email templates and sending them out using their simple API. The UI is simple and intuitive.
Unspam.email
I picked Unspam.email after trying several other spam-testing tools. It’s the only one that felt built for SaaS teams, fast setup, clear guidance, and results I can actually act on. Instead of dump...
As part of the email marketing team, we focus heavily on email deliverability. The Unspam tool and service have been invaluable in helping us resolve deliverability issues and improve our sender re...
Unspam helps us maintain high email deliverability for our AI startup, ensuring our messages consistently reach our audience’s inboxes.
Related Comparisons
Frequently Asked Questions
Which is better, Postmark or Unspam.email?
Based on FactScore™, Postmark leads with a score of 62.8 vs 30.1. Postmark has a higher rating of 5.0★ compared to 5.0★.
What are the pros of Postmark compared to Unspam.email?
Postmark uniquely offers: Reliable email delivery, Fast performance, Human support, Transactional email, Affordable pricing.
What are the pros of Unspam.email compared to Postmark?
Unspam.email uniquely offers: Email deliverability improvement, DNS setup assistance, Inbox placement, No account required, Spam score analysis.
Is Postmark better rated than Unspam.email?
Postmark is rated 5.0★ from 17 reviews. Unspam.email is rated 5.0★ from 3 reviews.
What is the FactScore™ of Postmark and Unspam.email?
FactScore™ weighs rating and review volume together. Postmark scores 62.8 and Unspam.email scores 30.1.
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