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ZIP Code API VS SmallSEOTools

Compare ZIP Code API VS SmallSEOTools and see what are their differences

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Contents:
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  2. ยป Videos
  3. ยป Reviews
  4. ยป Alternatives

ZIP Code API logo ZIP Code API

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

SmallSEOTools logo SmallSEOTools

Do you need effective SEO tools which are 100% free? Check out our SmallSEOtools.com for checking and removing plagiarism, backlinks, tracking keyword positions, and more.
  • ZIP Code API Landing page
    Landing page //
    2026-05-21

API for US ZIP, ZIP+4, and Canadian postal code data. One unified endpoint set covers North America โ€” no separate APIs by country or data type.

What it does

  • Address validation and standardization โ€” production-grade parser with ZIP+4 append, refreshed monthly
  • Radius search โ€” centroid haversine and true spatial polygon intersection. Returns ZIPs/FSAs within range, with per-result pct_inside overlap percentage for spatial queries
  • Unified lookup endpoint โ€” accepts US ZIP, ZIP+4, Canadian FSA, full Canadian postal codes, or latitude/longitude inputs
  • Autocomplete/typeahead โ€” cities, counties, metros, states, FSAs, ZIPs
  • Point-to-point distance โ€” between any two postal points
  • Census ACS demographics โ€” 2011โ€“2024, 542 fields per ZIP across income, education, housing, social, and economic profiles
  • Boundary lookups โ€” Census tracts, congressional districts, state legislative areas, school districts โ€” with computed intersection percentages per ZIP

What makes it different

  • Licensed commercial data โ€” not commodity or scraped sources
  • Canadian postal coverage โ€” most peers in this space are US-only
  • True spatial radius โ€” not just centroid haversine
  • 14 years of historical ACS depth via API โ€” unusual outside of raw Census downloads
  • One endpoint for all of North America โ€” no country-detection or input-routing logic to maintain on the client side

Pricing

  • Free โ€” 2,500 lookups/day, no credit card required, no expiry
  • Developer โ€” $49/mo, 100K credits, 300/min
  • Professional โ€” $149/mo, 350K credits, 300/min
  • Business โ€” $499/mo, 1.5M credits, 600/min
  • Credit packs โ€” one-time, from 25K ($19) up to 2M ($799)

Resources

  • SmallSEOTools Landing page
    Landing page //
    2023-04-03

Do you need effective SEO tools which are 100% free? Check out our SmallSEOtools.com for checking and removing plagiarism, backlinks, tracking keyword positions, and more.

ZIP Code API

Website
zip-codes.com
Pricing URL
-
$ Details
-
Platforms
-
Release Date
2026 April
Startup details
Country
United States
State
NY
City
Hopewell Junction
Edit details

SmallSEOTools

Website
smallseotools.com
Pricing URL
Official SmallSEOTools Pricing
$ Details
freemium $9.8 / Monthly
Platforms
Browser Web Windows Mac OSX Android iOS
Release Date
-
Edit details

ZIP Code API features and specs

  • Comprehensive ZIP Code Data
    The ZIP Code API from zip-codes.com provides extensive data including ZIP code details, city information, state data, and geographic coordinates, making it a thorough resource for location-based lookups.
  • Multiple Lookup Options
    The API supports various types of lookups including ZIP code to city/state, city/state to ZIP code, distance calculations between ZIP codes, and radius searches, offering flexible querying capabilities.
  • Easy Integration
    The API uses standard REST-based HTTP requests and returns data in commonly used formats like JSON and XML, making it straightforward to integrate into most applications and programming languages.
  • Distance and Radius Calculations
    The API includes built-in functionality for calculating distances between ZIP codes and finding ZIP codes within a specified radius, which is valuable for store locators, shipping estimates, and proximity-based features.
  • Well-Documented Endpoints
    The API provides clear documentation for its various endpoints and parameters, helping developers understand available features and implement them correctly without extensive trial and error.

SmallSEOTools features and specs

  • User-Friendly Interface
    SmallSEOTools features an intuitive and easy-to-navigate interface, making it accessible for users with varying levels of technical expertise.
  • Wide Range of Tools
    The platform offers a diverse set of tools including plagiarism checker, grammar checker, keyword position checker, and backlink tools, providing a comprehensive suite for SEO and content needs.
  • Free Access
    Many tools on SmallSEOTools are available for free, which is highly beneficial for freelancers, students, and small businesses with limited budgets.
  • No Registration Required
    Users can access and utilize most tools without the need to register or log in, offering convenience and speed.
  • Quick Results
    The platform provides fast and efficient results, enabling users to quickly analyze data and improve their SEO and content strategies.

Possible disadvantages of SmallSEOTools

  • Ads and Pop-ups
    The presence of numerous ads and pop-ups can be distracting and may hinder user experience.
  • Limited Free Usage
    Certain tools on the platform have usage limits for free users, which may necessitate purchasing a subscription for extensive use.
  • Accuracy Concerns
    Some users have reported that the results from certain tools, such as the plagiarism checker and keyword position checker, may not be as accurate as premium alternatives.
  • Basic Features
    While the tools are functional, they may lack advanced features and analytics found in more professional, paid SEO tools.
  • Data Privacy Concerns
    As a free tool with no registration required, users may have uncertainties regarding how their data and content are stored and used.

Analysis of ZIP Code API

Overall verdict

  • ZIP Code API from zip-codes.com is a solid, reliable choice for developers and businesses needing accurate US and Canadian postal code data, offering a straightforward RESTful interface with regularly updated databases.

Why this product is good

  • Provides accurate and frequently updated ZIP code, city, state, and geographic data
  • Offers a simple RESTful API that is easy to integrate into web and mobile applications
  • Supports features like ZIP code lookup, radius search, and distance calculations
  • Includes both US ZIP codes and Canadian postal codes for broader coverage
  • Backed by an established data provider with a long track record in postal data

Recommended for

  • Developers building address validation or autofill features
  • E-commerce platforms needing shipping and location-based calculations
  • Businesses performing geographic or radius-based store locators
  • Applications requiring reliable US and Canadian postal data
  • Marketing and logistics teams that need regional or demographic targeting

Analysis of SmallSEOTools

Overall verdict

  • SmallSEOTools is generally regarded as a useful resource for quick and simple SEO-related tasks, particularly for those who need free and easy-to-use tools. However, it may not be the best choice for more advanced SEO needs or for users who require in-depth analysis and features, as free tools often come with limitations.

Why this product is good

  • SmallSEOTools offers a variety of free online tools that cater to individuals and businesses in need of basic SEO optimization, content creation, and plagiarism detection. It is user-friendly and accessible without the need for registration, making it a convenient resource for quick tasks and checks.

Recommended for

    Freelancers, small business owners, bloggers, and students who are looking for an easy and accessible way to perform basic SEO tasks, check for plagiarism, or quickly generate content without significant financial investment.

ZIP Code API videos

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SmallSEOTools videos

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SEO - Part 83 | SmallSEOTools: 100% Free SEO Tools - Rank #1 on google 2019

Category Popularity

0-100% (relative to ZIP Code API and SmallSEOTools)

ZIP Code API

SmallSEOTools

Zip Lookup
100 100%
Zip Lookup
0% 0
SEO Tools
0 0%
SEO Tools
100% 100
APIs
100 100%
APIs
0% 0
Developer Tools
6 6%
Developer Tools
94% 94

User comments

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Reviews

These are some of the external sources and on-site user reviews we've used to compare ZIP Code API and SmallSEOTools

ZIP Code API Reviews

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SmallSEOTools Reviews

  1. Farooq Khan
    ยท Webmaster at Techinciter ยท
    Excellent SEO Tools for all.

    I'm using smallseotools since 2015. It's very helpful for me, especially plagiarism checker is very useful to check my content

    ๐Ÿ Competitors:
    ๐Ÿ‘ Pros:    Easy to use|Advanced features|Advanced ai
    ๐Ÿ‘Ž Cons:    Did not find any cons
Free SEO Tools To Improve Your Rankings
SmallSEOTools - Free online plagiarism tool that checks for duplicate content with quick and accurate results. Limited to 1000 words per page.
Source: www.megaleechers.com

Social recommendations and mentions

Based on our record, SmallSEOTools seems to be more popular. It has been mentiond 1 time since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.

ZIP Code API mentions (0)

We have not tracked any mentions of ZIP Code API yet. Tracking of ZIP Code API recommendations started around May 2026.

SmallSEOTools mentions (1)

What are some alternatives?

When comparing ZIP Code API and SmallSEOTools, you can also consider the following products

Smarty - Smarty provides address validation, autocomplete, geocoding and reverse geocoding services covering addresses in over 240+ countries.

iLovePDF - Premium online PDF tool set

Zipcodestack - Free Zip Code API - Free Postal Code Validation | Zipcodestack

TinyWow - TinyWow provides free online conversion, pdf, and other handy tools to help you solve problems of all types.

PostalDataPI - The most affordable postal code API. 240+ countries, sub-5 ms responses. Simple, elegant, transparent.

Ahrefs - Ahrefs is a toolset for SEO and marketing. We have tools for backlink research, organic traffic research, keyword research, content marketing & more. Give Ahrefs a try!

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