
Superhuman
Shortwave
Spark Mail
FiloMail
Mimestream
Leave Me Alone
Clean Email
The best and most innovative mail app to master your overloaded mailbox.

Postio.co.uk
Ideal postcodes
Fetchify
Smarty
Data8 UK
ZIP Code API
Data8 UK PredictiveAddress
The most affordable postal code API. 240+ countries, sub-5 ms responses. Simple, elegant, transparent.

Which is more popular?
Website, pricing, platforms and company facts side by side.
|
|
|
|
|---|---|---|
| Website | info.easi.net | postaldatapi.com |
| Pricing | — | |
| Company | — | Startup from the United States · 1 - 9 employees · 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of InboxZero yet.
PostalDataPI is a global postal code validation and enrichment API covering 240+ countries and territories. One API, one key, one flat rate — $0.000028 per query with no tiers or subscriptions. What you get back: Up to 18 metadata fields per postal code — city, state/region, coordinates,...
What each product offers, as listed by its team.


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


No analysis of InboxZero yet.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
No InboxZero videos yet. You could help us improve this page by suggesting one.
PostalDataPI Now Returns 18 Fields Per Postal Code — for 240+ Countries
More videos
How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using InboxZero and PostalDataPI. For example, how are they different and which one is better?
When comparing InboxZero and PostalDataPI, you can also consider the following products.


Fast UK address, email & phone validation APIs for developers. Official Royal Mail PAF data. Pay as you go, 100 free lookups.
Compare Postio.co.uk to InboxZero or PostalDataPI:

Email smarter & faster with a reinvented experience for your Gmail
Compare Shortwave to InboxZero or PostalDataPI:

We help businesses improve UX and data quality with a cutting edge address validation service.
Compare Ideal postcodes to InboxZero or PostalDataPI:

Spark helps you take your inbox under control. Instantly see what’s important and quickly clean up the rest. Spark for Teams allows you to create, discuss, and share email with your colleagues
Compare Spark Mail to InboxZero or PostalDataPI:

Fetchify delivers fast, accurate address, email, phone and bank validation tools that help businesses capture clean, verified customer data, reduce failed deliveries and improve checkout experiences worldwide.
Compare Fetchify to InboxZero or PostalDataPI: