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ZIP Code API VS Syften

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

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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

Syften logo Syften

Better social media keyword alerts
  • 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 — 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 true spatial polygon intersection. Returns ZIPs/FSAs within range, with per-result pct_inside overlap percentage for spatial queries
  • Unified lookup endpoint — accepts US ZIP, ZIP+4, Canadian FSA, full Canadian postal codes, or latitude/longitude inputs
  • Autocomplete/typeahead — cities, counties, metros, states, FSAs, ZIPs
  • Point-to-point distance — between any two postal points
  • Census ACS demographics — 2011–2024, 542 fields per ZIP across income, education, housing, social, and economic profiles
  • Boundary lookups — Census tracts, congressional districts, state legislative areas, school districts — with computed intersection percentages per ZIP

What makes it different

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

Pricing

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

Resources

  • Syften Landing page
    Landing page //
    2024-05-04

Get instant notifications about online discussions that you can participate in.

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

Syften

Website
syften.com
Pricing URL
Official Syften Pricing
$ Details
freemium $8.29 / Monthly
Platforms
Browser REST API Slack
Release Date
2019 May
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.

Syften features and specs

  • Real-time Monitoring
    Syften offers real-time monitoring of social media, forums, and blogs, enabling businesses to respond to customer feedback and industry trends instantly.
  • Customizable Alerts
    The platform provides highly customizable alert systems, allowing users to filter the noise and focus on relevant information, ensuring they receive only the most pertinent updates.
  • Ease of Use
    Syften features a user-friendly interface that makes it easy for users to set up and manage their monitoring activities without requiring advanced technical skills.
  • Comprehensive Coverage
    The platform covers a wide range of sources including social media, forums, blogs, and other online communities, offering comprehensive monitoring capabilities.
  • Integrations
    Syften integrates smoothly with other tools such as Slack, Trello, and others, allowing for seamless workflow integration and improving team collaboration.

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 Syften

Overall verdict

  • Syften is a useful tool for businesses seeking to improve their online presence and reputation management. Its comprehensive monitoring capabilities and user-friendly interface make it a strong option for companies prioritizing customer engagement and proactive issue resolution.

Why this product is good

  • Syften is a social media monitoring tool designed to help businesses track mentions of their brand, products, or competitors across various online platforms. It provides real-time notifications, insightful analytics, and integrates with popular communication apps, which can enhance a company's ability to engage with its audience and address customer inquiries or feedback promptly.

Recommended for

  • Businesses looking to enhance their brand monitoring and social media strategy
  • Marketing teams that need real-time analytics and notifications for online mentions
  • Customer support teams aiming to respond quickly to feedback or queries on social platforms

ZIP Code API videos

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Syften videos

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Syften Demo

Category Popularity

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

ZIP Code API

Syften

Zip Lookup
100 100%
Zip Lookup
0% 0
Reputation Management
0 0%
Reputation Management
100% 100
APIs
100 100%
APIs
0% 0
Social Media Monitoring
0 0%
Social Media Monitoring
100% 100

User comments

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

Based on our record, Syften seems to be more popular. It has been mentiond 17 times 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.

Syften mentions (17)

  • Managing my motivation as a solo dev
    Another great service for mentions is https://syften.com/, also supports Twitter but is paid. - Source: Hacker News / about 2 years ago
  • Ask HN: What is used instead of mention.com nowadays?
    I'm working on https://syften.com - a few of my users switched from Mention. - Source: Hacker News / over 2 years ago
  • Ask HN: How to subscribe for specific repeated stories on HN
    You can try https://syften.com, but it's paid. - Source: Hacker News / over 2 years ago
  • Insanely Fast Whisper: Transcribe 300 minutes of audio in less than 98 seconds
    You might find https://syften.com/ interesting. I use it for monitoring Reddit and all kinds of communities for mentions of my name and the titles of my books. - Source: Hacker News / almost 3 years ago
  • Ask HN: Looking for a Tool to Monitor Hacker News
    Have you tried this one? https://syften.com/?redirect=false#pricing. Seems like it's an option for your use case. You just format the example of a problem as keyword as filter. - Source: Hacker News / about 3 years ago
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What are some alternatives?

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

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

F5Bot - F5Bot will send you an email whenever your brand, product, or keyword is mentioned online.

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

Brand24 - Brand24 is an AI-powered media monitoring tool that analyzes mentions and presents actionable insights.This tool is designed to keep track of online conversations about your brand, products, and competitors.

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

AffiliateWP - A powerful affiliate marketing solution for WordPress.

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