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

OpenRouter
liteLLM
Helicone AI
boldrouter
Eden AI
Langfuse
APIPark
Build production-grade & reliable AI apps with Portkey

Which is more popular?
Based on our record, Portkey seems to be more popular. It has been mentioned 13 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 | zip-codes.com | portkey.ai |
| 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 Portkey 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 Portkey yet.
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Recommendations tracked on public social media and blogs since March 2021.

Tracking ZIP Code API since May 2026.
Once you outgrow it, pay-as-you-go charges each provider's list price with no markup on tokens, plus the 5.5% fee when you buy credits. If you already have keys with OpenAI, Anthropic or Google, bring your own key routes through them... - Source: dev.to / 8 days ago
Portkey has the broadest adoption story in the open-source gateway space, a large community, and a deep enterprise tier. It is a reasonable pick for teams that want a mature product with a long feature list. - Source: dev.to / 29 days ago
Portkey is an open-source AI gateway that unifies access to 250+ Large Language Models (LLMs) across dozens of providers behind a single, OpenAI-compatible API. Instead of integrating with each provider's SDK, applications send requests... - Source: dev.to / about 1 month ago
When comparing ZIP Code API and Portkey, 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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Free Zip Code API - Free Postal Code Validation | Zipcodestack
Compare Zipcodestack to ZIP Code API or Portkey:


The most affordable postal code API. 240+ countries, sub-5 ms responses. Simple, elegant, transparent.
Compare PostalDataPI to ZIP Code API or Portkey:

Open-source LLM Observability for Developers
Compare Helicone AI to ZIP Code API or Portkey: