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

Supabase
AppWrite
Firebase
Strapi
Convex.dev
Xano
Coolify
Open Source backend with realtime database, authentication, file storage and admin dashboard, all compiled in 1 portable executable.

Which is more popular?
Based on our record, PocketBase.io seems to be more popular. It has been mentioned 104 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 | pocketbase.io |
| Pricing | — | |
| Platforms | — | |
| Company | Startup from the United States · 2026 | 2022 |
| 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...
PocketBase is a Go backend (framework and app) that includes: embedded database with realtime subscriptions backed-in files and users management convenient Admin dashboard UI simple REST-ish API And all of this compiles in a single portable executable.
What each product offers, as listed by its team.

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 PocketBase.io yet.
How often each product is chosen within a category, 0–100% relative to the other.

Share your experience with using ZIP Code API and PocketBase.io. 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.
I built this because I self host a lot of stuff and wanted to simplify tossing up a simple static site with no backend, no NGINX/Caddy/Traffik configs, instantly deploy with a single file copy. Powered by Golang's built-in reverse proxy... - Source: Hacker News / 2 months ago
Excluded on purpose: go-blueprint And gowebly (generators for a project Skeleton, excellent, not SaaS kits), PocketBase (a backend-in-one-file you build a SaaS on, not a SaaS), and the dozens Of "Go + HTMX + templ starter"... - Source: dev.to / 2 months ago
If you haven't used PocketBase: it's an open-source backend in a single Go binary. Embedded SQLite, auth, real-time subscriptions, file storage, REST API, admin UI — all included. The catch has always been hosting it: renting a VPS,... - Source: dev.to / 4 months ago
When comparing ZIP Code API and PocketBase.io, 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
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Appwrite provides web and mobile developers with a set of easy-to-use and integrate REST APIs to manage their core backend needs.
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The most affordable postal code API. 240+ countries, sub-5 ms responses. Simple, elegant, transparent.
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Firebase is a cloud service designed to power real-time, collaborative applications for mobile and web.
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