
Gloww
Sessions
Zoom
SoWork
Gather Town
Whereby (formerly appear.in)
SpatialChat
Virtual workshops smooth as butter
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
Which is more popular?
Based on our record, Butter.us seems to be more popular. It has been mentioned 4 times since March 2021.
Website, pricing, platforms and company facts side by side.
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ZIP
ZIP Code API
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| Website | butter.us | zip-codes.com |
| Pricing | — | |
| Platforms | — | |
| Company | 2020 | Startup from the United States · 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.

With Butter, you can energise your virtual workshops with ease. Put your focus back into running interactive and collaborative workshops, and less on managing multiple tools with Butter. It’s built with all the tools you need to run interactive and collaborative sessions. 🚀 Less app- or...
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...
What each product offers, as listed by its team.

Possible disadvantages
An editorial look at what each product does well and who it suits.

No analysis of Butter.us yet.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
ButterMixer Vol. 03
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How often each product is chosen within a category, 0–100% relative to the other.

Share your experience with using Butter.us and ZIP Code API. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.

We've been playing with butter.us for internal and external video calls. The extra integration layer for content sharing and working together is pretty neat. Check it out too. Source: over 4 years ago
Butter | Full Time | REMOTE (Work From Anywhere) | https://careers.butter.us At Butter (https://butter.us), we're building the most powerful and delightful platform to facilitate online workshops and trainings. Our main tech stack:... - Source: Hacker News / over 5 years ago
We’re a tech company, and we’re building software. Our website is https://butter.us The talents we hire are very specialized and technical, so that adds to the complexity. Source: over 5 years ago
Tracking ZIP Code API since May 2026.
When comparing Butter.us and ZIP Code API, you can also consider the following products.


Smarty provides address validation, autocomplete, geocoding and reverse geocoding services covering addresses in over 240+ countries.
Compare Smarty to Butter.us or ZIP Code API:

Free Zip Code API - Free Postal Code Validation | Zipcodestack
Compare Zipcodestack to Butter.us or ZIP Code API:

Equip your team with tools designed to collaborate, connect, and engage with teammates and customers, no matter where you’re located, all in one platform.
Compare Zoom to Butter.us or ZIP Code API:

The most affordable postal code API. 240+ countries, sub-5 ms responses. Simple, elegant, transparent.
Compare PostalDataPI to Butter.us or ZIP Code API: