Postmark
Email for web applications
ProtonMail
Secure email that respects your privacy, brought to you.
Updated February 2026
| Postmark | ProtonMail | |
|---|---|---|
| Rating | 5.0★ | 4.6★ |
| Reviews | 17 | 10 |
| Pros | 9 | 9 |
| FactScore™ | 62.8 | 47.9 |
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 ProtonMail — Pros
Security and privacy Easy to use Commitment to mission Modern UI VPN features Customer support End to end encryption Free tier Spam protectionOnly in Postmark — Cons
—Both tools — Cons
—Only in ProtonMail — Cons
Interoperability issues Cost effectiveness Limited free tier functionality Linux supportDetails
| Postmark | ProtonMail | |
|---|---|---|
| Categories | Email clients, Email marketing | Email clients, Safety and Privacy platforms |
| Platforms | Web · iOS | Web · iOS · Android |
| Became Popular | July 23, 2014 | March 17, 2016 |
| Website | postmarkapp.com | protonmail.com |
Who Should Pick Which?
Choose Postmark if...
- Reliable email delivery
- Fast performance
- Human support
Choose ProtonMail if...
- Security and privacy
- Easy to use
- Commitment to mission
With a FactScore™ of 62.8 vs 47.9, Postmark leads in community reception. Postmark uniquely offers Reliable email delivery and Fast performance, while ProtonMail stands out for Security and privacy and Easy to use.
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.
ProtonMail
Protonmail makes the mail service secure. We need more products like this. However, it might be more cost effective.
ProtonMail is the best alternative to Gmail I know. Their commitment to privacy, the free tier, and the modern UI make it a no-brainer when looking for a valid email provider.
Great email service. VPN has some interoperability issues with things like pocketcasts.
Related Comparisons
Frequently Asked Questions
Which is better, Postmark or ProtonMail?
Based on FactScore™, Postmark leads with a score of 62.8 vs 47.9. Postmark has a higher rating of 5.0★ compared to 4.6★.
What are the pros of Postmark compared to ProtonMail?
Postmark uniquely offers: Reliable email delivery, Fast performance, Human support, Transactional email, Affordable pricing.
What are the pros of ProtonMail compared to Postmark?
ProtonMail uniquely offers: Security and privacy, Easy to use, Commitment to mission, Modern UI, VPN features.
Is Postmark better rated than ProtonMail?
Postmark is rated 5.0★ from 17 reviews. ProtonMail is rated 4.6★ from 10 reviews.
What is the FactScore™ of Postmark and ProtonMail?
FactScore™ weighs rating and review volume together. Postmark scores 62.8 and ProtonMail scores 47.9.
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