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

Cryptio
VaultNow
PayeeProof
Coinfella.io
Copperx.io
SMPLR
BitPay
A suite of financial tools to make your life easier - crypto freelancers & organizations use Request Finance for invoices, expenses, payroll, and accounting.

Which is more popular?
Based on our record, Request Finance seems to be more popular. It has been mentioned 1 time 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 | zip-codes.com | requestfinance.com |
| Pricing | — | |
| Company | Startup from the United States · 2026 | — |
| Listed in |
In their own words, as submitted to SaaSHub.

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...
No description of Request Finance 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.

Overall verdict
Why this product is good
Recommended for
No analysis of Request Finance yet.
Walkthroughs and reviews on video.
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Batch pay invoices using Ledger wallet (with Request Finance)
How often each product is chosen within a category, 0–100% relative to the other.

Share your experience with using ZIP Code API and Request Finance. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.

Tracking ZIP Code API since May 2026.
As a freelancer, I’ve used request.finance to be paid in crypto, and also to pay subcontractors in crypto. Source: over 3 years ago
When comparing ZIP Code API and Request Finance, you can also consider the following products.

Smarty provides address validation, autocomplete, geocoding and reverse geocoding services covering addresses in over 240+ countries.
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Accounting & analytics solution for your crypto portfolio
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Free Zip Code API - Free Postal Code Validation | Zipcodestack
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All-in-one crypto finance platform for companies that run on stablecoins. Invoicing, payouts, treasury, budgets and AML — the whole money path in one non-custodial system. No banking friction, no spreadsheet reconciliation.
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The most affordable postal code API. 240+ countries, sub-5 ms responses. Simple, elegant, transparent.
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Security-first stablecoin payout verification layer for wallet ownership, network and asset matching, mismatch detection, and audit trail.
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