
Thunderbird
Mailbird
Microsoft Outlook
Apple Mail
Postbox
Mailspring
Evolution
eM Client is a fully-featured email client for Windows and macOS with a clean and easy-to-use interface. eM Client also offers features for calendars, tasks, contacts, notes, and chat.

ZIP Code API
ZipCheckup
PostalCodes.info
Smarty
Geocode.xyz
Geoco.io
getAddress.io
Free Zip Code API - Free Postal Code Validation | Zipcodestack
Which is more popular?
eM Client might be a bit more popular than Zipcodestack. We know about 4 links to it since March 2021 and only 3 links to Zipcodestack.
Website, pricing, platforms and company facts side by side.
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In their own words, as submitted to SaaSHub.


→ all major services supported (including Gmail, Exchange, iCloud, and Outlook365) → automatic set up for most email services → simple and fast data import from all major email apps (including Microsoft Outlook, Outlook Express, Windows Mail, Thunderbird, Incredimail and more). → touch support...
No description of Zipcodestack yet.
What each product offers, as listed by its team.


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


No analysis of eM Client yet.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
eM Client Review - Best email client for Windows!
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How often each product is chosen within a category, 0–100% relative to the other.


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


If you have multiple email accounts and want a neat way to organize them, eM Client can be a good option to consider. It has a few unique features, such as the Sidebar view, which can help provide context and improve...
One point in eM Client’s favor is its free version. However, its features are pretty limited. For example, you can only use it with two email addresses, and the only customer support option is the user forum.
EM Client is a strong competitor of Outlook that has a easy-to-use interface. This application helps you to manage email, calendar, contacts, and tasks. It can be used for Windows and Mac.
We have no reviews of Zipcodestack yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.


Also, if you're also trying to use Xtra email in Microsoft Outlook, also expect problems. Outlook is also crap. There are other email application options. Em Client (emclient.com) is an excellent alternative to Outlook. Source: about 3 years ago
Totally agree on the security risk. On the other hand setting up, maintaining and explaining PGP for non-technical users usually leads to not using encryption at all, which is by far less secure than a self-managed PGP gateway on a... Source: over 4 years ago
I use EmClient for my email/calendar on Windows desktop. Source: almost 5 years ago
Using the zipcodestack API in your Node.js application is straightforward. You’ll first need to sign up for a free API key (it only takes a minute). Once you have your API key, you can call the REST endpoints using any HTTP client. Below... - Source: dev.to / about 1 year ago
Zipcodestack - Free Zip Code API and Postal Code Validation. Ten thousand free requests/month. - Source: dev.to / over 2 years ago
I have seen this request pop up quite a few times. I did a quick search for free APIs of zipcode lookups. This one, named "zipcodestack" (I'm not in any way tied to, endorsing, or promoting them) seemed like a pretty good resource with... Source: over 3 years ago
When comparing eM Client and Zipcodestack, you can also consider the following products.

Thunderbird is a free email application that's easy to set up and customize - and it's loaded with great features!
Compare Thunderbird to eM Client or Zipcodestack:
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
Compare ZIP Code API to eM Client or Zipcodestack:

Mailbird is the best email client for Windows 7, 8 and 10
Compare Mailbird to eM Client or Zipcodestack:

Check water quality, product recalls, energy rebates, and safety alerts for any U.S. ZIP code. Free reports powered by EPA and government data.
Compare ZipCheckup to eM Client or Zipcodestack:

Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.
Compare Microsoft Outlook to eM Client or Zipcodestack:
Postal code lookup API and downloadable country datasets for address validation, checkout, logistics and geocoding workflows.
Compare PostalCodes.info to eM Client or Zipcodestack: