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

KeePass
1Password
Team Password Manager
Psono Password Manager
Dashlane
Keeper
KeeWeb
Spectre is a web application to diff screenshots.

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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 | github.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 Spectre yet.
What each product offers, as listed by its team.

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Why this product is good
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Overall verdict
Why this product is good
Recommended for
Spectre.css is recommended for developers who prefer a lightweight framework and are focusing on performance, simplicity, and clean aesthetics in their web projects. It's ideal for those who want to avoid unnecessary bloat and need a foundation that's easy to customize and extend according to their needs.
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Spectre is a modern, free and responsive CSS framework. It offers elegant elements, flexbox-based responsive layout system and CSS components and utilities, that can be modified with Sass and Scss compiler. It is...
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Smarty provides address validation, autocomplete, geocoding and reverse geocoding services covering addresses in over 240+ countries.
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KeePass is an open source password manager. Passwords can be stored in highly-encrypted databases, which can be unlocked with one master password or key file.
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Free Zip Code API - Free Postal Code Validation | Zipcodestack
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1Password can create strong, unique passwords for you, remember them, and restore them, all directly in your web browser.
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The most affordable postal code API. 240+ countries, sub-5 ms responses. Simple, elegant, transparent.
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Team Password Manager is a web based, self hosted password manager software for groups.
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