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ZIP Code API VS Diigo

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

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Contents:
  1. ยป Base Details
  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

Diigo logo Diigo

Diigo is a powerful research tool and a knowledge-sharing community
  • 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

  • Diigo Landing page
    Landing page //
    2023-04-20

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.

Diigo features and specs

  • Bookmarking
    Allows users to save and organize web pages for future reference, which is particularly useful for research and continuous learning.
  • Annotation Tools
    Users can highlight text and add sticky notes directly on web pages, making it easy to retain important information and notes.
  • Collaboration
    Supports group features that allow for collaboration by sharing bookmarks, notes, and annotations, enhancing team productivity.
  • Cloud-Based Access
    Being cloud-based, Diigo ensures that bookmarks, annotations, and notes are accessible from any device with internet access, providing flexibility and convenience.
  • Search Functionality
    Powerful search capabilities that help users find saved bookmarks and notes easily, increasing efficiency.
  • Integrations
    Integrates with other tools and platforms, such as web clippers for browsers and mobile apps, enhancing its utility.

Possible disadvantages of Diigo

  • User Interface
    Some users may find the interface to be outdated and not as intuitive as other bookmarking or note-taking tools.
  • Cost
    Advanced features require a premium subscription, which may be a barrier for some users looking for free solutions.
  • Learning Curve
    The wide range of features can be overwhelming for new users, leading to a longer learning curve to become proficient.
  • Privacy Concerns
    As with any cloud-based service, there are concerns about data privacy and security, particularly with sensitive information.
  • Occasional Bugs
    Users have reported occasional bugs and glitches, which can affect the smoothness of the experience.

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 Diigo

Overall verdict

  • Overall, Diigo is considered a good tool due to its robust set of features that cater to users looking for a comprehensive web annotation and bookmarking solution.

Why this product is good

  • Diigo is a versatile social bookmarking tool with features such as online bookmarking, annotation, archiving, and collaboration, which are particularly useful for researchers, students, and professionals who need to organize, share, and manage digital information efficiently.

Recommended for

  • Students who want to organize their research resources
  • Researchers in need of a collaborative annotation platform
  • Professionals who manage large amounts of digital information
  • Educators looking for a tool to help with collaborative learning

ZIP Code API videos

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Diigo videos

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Intro to Diigo

More videos:

  • Review - Diigo Review
  • Review - Organize Your Research with Diigo (Part 1 of 3)

Category Popularity

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

ZIP Code API

Diigo

Zip Lookup
100 100%
Zip Lookup
0% 0
Bookmark Manager
0 0%
Bookmark Manager
100% 100
APIs
100 100%
APIs
0% 0
Bookmarks
0 0%
Bookmarks
100% 100

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 Diigo

ZIP Code API Reviews

We have no reviews of ZIP Code API yet.
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Diigo Reviews

Best Bookmark Managers for Teams, Designers & Power Users
Diigo is a research-focused bookmark manager that caters to users who want more than just a place to store links. It supports detailed organization through tags and lists and is widely used in academic and educational settings. Whether youโ€™re collecting references or building a digital library of knowledge, Diigo helps you stay organized and focused.
Source: blog.linkinize.com
Top 10 browser-independent bookmark managers for efficient web surfing
All BlogsPublished in Top 10 browser-independent bookmark managers for efficient web surfingShare this postLinkedIn iconFacebook iconTwitter iconThe only bookmarking tool you'll ever needTry for freeTable of contents1. Can bookmarks be shared between different browsers?2. What does the browser-independent bookmark manager do?3. Is it safe to use a bookmarks manager?4. What...
Source: www.save.day
Top 10 Bookmark Managers for Chrome 2024
Diigo is an easy-to-use bookmark manager tool where users can connect as many tools to their service. You can access to all the basic necessities to bookmark, archive, screenshot and markup in Diigo.
Source: web.curateit.com
15 Best Xmarks Alternatives For Bookmarks Synchronization
Diigo is a bookmarking toolbar that makes a difference. It allows users to bookmark and organize their favourite websites and also to annotate and highlight pages using the built-in tool. This tool is available for both iOS and Android platforms and can also work as a separate application despite the toolbar in your google chrome.
Source: techreen.com
10 Best Apps like Pocket in 2021 - Pocket Alternatives
Diigo is another excellent app like Pocket, that you can use today. Diigoโ€™s free account allows you to save 500 bookmarks and 100 highlights with advertisements. If you require more, you can buy a $40 per year plan that allows you to save limitless online content. Diigo facilitates you to save anything from the internet, including images, web pages, PDFs, and so on.
Source: asoftclick.com

Social recommendations and mentions

Based on our record, Diigo 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.

Diigo mentions (1)

  • Ask HN: Is there a spiritual successor to del.icio.us?
    Https://diigo.com It's less simple than Delicious used to be, but it scratched the itch for a while for me. I barely ever bookmark anything these days. When Delicious was sold I stopped using it, and realised I didn't miss bookmarking and hardly ever read any of my bookmarks anyway. Excessive bookmarking seems like FOMO to me, I try to avoid it and embrace a more Zen-like attitude :). - Source: Hacker News / almost 4 years ago

What are some alternatives?

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

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

Raindrop.io - All your articles, photos, video & content from web & apps in one place.

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

Pinboard - Pinboard is a personal archive for things you find online and don't want to forget.

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

start.me - A Modern-day bookmark manager. A place for your favorites. A news feed (RSS) reader. A browser startpage. A portal for your team.

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