
ProtonMail
Gmail
FastMail
Microsoft Outlook
Zoho Mail
Posteo
Yahoo Mail
Get your encrypted mailbox for free.
Smarty
Zipcodestack
PostalDataPI
Geoco.io
Melissa Data Quality
Loqate
usZIPCodes.org
REST API for US ZIP, ZIP+4, and Canadian postal codes. Single unified endpoint covers address validation and standardization, radius search (centroid haversine and true spatial polygon intersection), point-to-point distance, autocomplete/typeah
Which is more popular?
Based on our record, Tutanota seems to be more popular. It has been mentioned 183 times since March 2021.
Website, pricing, platforms and company facts side by side.
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ZIP
ZIP Code API
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| Website | tuta.com | zip-codes.com |
| Pricing | — | |
| Company | — | Startup from the United States · 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.

Tuta Mail is the secure email provider with automatic encryption built in. It focuses on security, privacy and open source. Tuta Mail is known as the best ProtonMail alternative as it is the largest encrypted email service in the European Union. German data protection laws which are even better...
API for US ZIP, ZIP+4, and Canadian postal code data. One unified endpoint set covers North America — no separate APIs by country or data type. What it does Address validation and standardization — production-grade parser with ZIP+4 append, refreshed monthly Radius search — centroid haversine and...
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
Tutanota is recommended for individuals and organizations looking for a secure and privacy-focused email service. It's particularly suitable for those concerned about data privacy and surveillance.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
Tutanota Review - Good as They Say?
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How often each product is chosen within a category, 0–100% relative to the other.

Share your experience with using Tutanota and ZIP Code API. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.

Tuta comes with automatic end-to-end encryption with post-quantum safe cryptography, two-factor authentication, and zero-knowledge architecture, so your data is never stored in plain text on its servers. You get this...
They and their servers are based in Germany where they’ve put a focus on sustainability. Their offices and servers are powered by 100% renewable energy so you can remain secure and help out the planet. Tutanota offers...
Overall, Tuta Mail is very similar to ProtonMail in what it offers. Like ProtonMail, Tuta Mail offers a completely ad-free experience with a set of standard email management features, some email organization options,...
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Recommendations tracked on public social media and blogs since March 2021.

According to the article, Andy Yen was afraid of their competitor Tuta (https://tuta.com/). Maybe that's a good place to start. - Source: Hacker News / 4 days ago
Hey, Tuta Team here. If you're looking for one with unlimited addresses for a custom domain, check out Tuta Mail: https://tuta.com. - Source: Hacker News / 9 months ago
I came across https://tuta.com/ which looks interesting. - Source: Hacker News / over 1 year ago
Tracking ZIP Code API since May 2026.
When comparing Tutanota and ZIP Code API, you can also consider the following products.

Secure email with absolutely no compromises. Get your free encrypted email account today.
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Smarty provides address validation, autocomplete, geocoding and reverse geocoding services covering addresses in over 240+ countries.
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Gmail is available across all your devices Android, iOS, and desktop devices. Sort, collaborate or call a friend without leaving your inbox.
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Free Zip Code API - Free Postal Code Validation | Zipcodestack
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Email, calendars, and contacts to highest standards of security, privacy and reliability.
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The most affordable postal code API. 240+ countries, sub-5 ms responses. Simple, elegant, transparent.
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