
Zoho Invoice
Bill.com
Wise
InvoiceOcean
ChargeDesk
EasyBill
Agnitumus Billing System
The Invoice Machine is an online invoicing service with a simple and elegant user interface.
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?
Website, pricing, platforms and company facts side by side.
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ZIP
ZIP Code API
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|---|---|---|
| Website | invoicemachine.com | zip-codes.com |
| Pricing | — | |
| Company | Startup from Sweden | Startup from the United States · 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.

No description of The Invoice Machine yet.
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
Freelancers, small business owners, and entrepreneurs who require a simple, intuitive platform for invoicing and keeping track of client payments without the need for complex accounting features.
Overall verdict
Why this product is good
Recommended for
How often each product is chosen within a category, 0–100% relative to the other.

Share your experience with using The Invoice Machine 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.

The Invoice Machine has all the basic features of an online invoicing tool. It simplifies bookkeeping and makes invoice generation a breeze. The API is open source, which means you can modify it with a few HTTP POST...
We have no reviews of ZIP Code API yet. Be the first one to post
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Your financial operations platform. The intelligent way to create and pay bills, send invoices, manage expenses, control budgets, and access the credit your business needs to grow—all on one platform.
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Free Zip Code API - Free Postal Code Validation | Zipcodestack
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Currency exchange Banks and other providers could charge you up to 5% in hidden costs when sending ...
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The most affordable postal code API. 240+ countries, sub-5 ms responses. Simple, elegant, transparent.
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