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ZIP Code API VS Daily Coding Problem

Compare ZIP Code API VS Daily Coding Problem and see what are their differences

JackHamr
AI agents that spec, build, test, and ship code โ€” with voice chat, deep GitHub integration, and zero LLM markup. featured
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Contents:
  1. ยป Base Details
  2. ยป Reviews
  3. 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

Daily Coding Problem logo Daily Coding Problem

Get exceptionally good at coding interviews
  • 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

  • Daily Coding Problem Landing page
    Landing page //
    2022-01-28

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.

Daily Coding Problem features and specs

  • Structured Learning
    Daily Coding Problem provides daily coding challenges, which encourages a consistent practice routine and helps improve problem-solving skills gradually over time.
  • Quality Problems
    The problems are curated to be of high quality, often aligning with those asked in actual coding interviews from top tech companies, ensuring that users get relevant and useful practice.
  • Detailed Solutions
    Each problem comes with a detailed solution that includes both the code and an explanation, which helps users understand the approach and improve their problem-solving techniques.
  • Focus on Interview Prep
    The platform is designed with a focus on preparing users for technical interviews, providing targeted practice that can help boost their confidence and performance in real interviews.
  • Accessibility
    Daily Coding Problem is accessible via email, making it easy for users to get their daily coding challenge delivered directly to their inbox, adding convenience to their learning process.

Possible disadvantages of Daily Coding Problem

  • Cost
    While Daily Coding Problem offers a free tier, the more detailed solutions and premium features require a subscription, which may be a barrier for some users.
  • Limited Community Interaction
    Unlike some other coding platforms, Daily Coding Problem does not have a strong community aspect, limiting users' ability to discuss problems and solutions with peers.
  • Email Dependency
    The reliance on email for delivering problems can be inconvenient for users who prefer to access their challenges via a more interactive web or mobile application.
  • Varied Difficulty
    The difficulty of daily problems can vary significantly, which might not always align with the userโ€™s skill level, potentially causing frustration or lack of appropriate challenge.
  • Problem Repetition
    Some users have reported occasional repetition of problems over time, which can reduce the freshness and perceived value of the daily challenges.

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 Daily Coding Problem

Overall verdict

  • Yes, Daily Coding Problem is a good resource.

Why this product is good

  • Daily Coding Problem provides high-quality practice problems that are geared towards improving coding skills and preparing for technical interviews. The problems vary in difficulty and come with well-explained solutions, which helps users learn and grow. Additionally, having problems delivered daily encourages consistent practice, which is essential for mastering coding skills.

Recommended for

  • Software engineers preparing for technical interviews
  • Coding enthusiasts looking to improve their problem-solving skills
  • Students seeking to supplement their computer science curriculum
  • Professionals in tech aiming to stay sharp with algorithm challenges

Category Popularity

0-100% (relative to ZIP Code API and Daily Coding Problem)

ZIP Code API

Daily Coding Problem

Zip Lookup
100 100%
Zip Lookup
0% 0
Online Learning
0 0%
Online Learning
100% 100
APIs
100 100%
APIs
0% 0
Education & Reference
0 0%
Education & Reference
100% 100

User comments

Share your experience with using ZIP Code API and Daily Coding Problem. For example, how are they different and which one is better?
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Social recommendations and mentions

Based on our record, Daily Coding Problem 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.

Daily Coding Problem mentions (1)

  • Telegram bot with daily problems notifications
    Great job! I also set a Telegram channel forwarding the dailycodingproblem.com. I'm sharing the link here if someone else needs: https://t.me/daily_coding_problems. Source: over 4 years ago

What are some alternatives?

When comparing ZIP Code API and Daily Coding Problem, you can also consider the following products

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

AlgoExpert.io - A better way to prep for tech interviews

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

interviewing.io - Free, anonymous technical interview practice

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

Interview Cake - Free practice programming interview questions. Interview Cake helps you prep for interviews to land offers at companies like Google and Facebook.

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