
Mentimeter
Kahoot!
Poll Everywhere
AhaSlides
Glisser
Wooclap
Meeting Pulse
Slido is the ultimate Q&A and polling platform for live and virtual meetings and events. It offers interactive Q&A, live polls and insights about your audience.
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, Sli.do seems to be more popular. It has been mentioned 1 time 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 | sli.do | zip-codes.com |
| Pricing | — | |
| Platforms | — | |
| Company | 2012 | Startup from the United States · 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.

No description of Sli.do yet.
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.

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

Overall verdict
Why this product is good
Recommended for
Sli.do is recommended for event organizers, educators, corporate trainers, webinar hosts, and conference managers. It is ideal for those looking to increase engagement in hybrid or virtual settings and for anyone seeking to make meetings and events more interactive and participant-focused.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
What is Slido
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How often each product is chosen within a category, 0–100% relative to the other.

Share your experience with using Sli.do and ZIP Code API. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.

The plans are not the same. Slido Professional has moderation, branding and multiple rooms, among other things, and Mentimeter’s conference pack has Excel export and editing together with your team. klapp has no...
Yet another highly rated tool, Slido helps you build interactive polls, quizzes or surveys. The tool is scalable and can cater their services to both individuals, and businesses. The participants don’t need to...
Slido shares many features with the other tools on this list. But it also lets your audience prioritize questions for Q&A sessions by upvoting/downvoting them – a concept that Reddit users will be familiar with. Also,...
We have no reviews of ZIP Code API yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.

Does anyone know of a open source self-hosted alternative to sli.do? Source: about 5 years ago
Tracking ZIP Code API since May 2026.
When comparing Sli.do and ZIP Code API, you can also consider the following products.

a web-based polling tool for workshops, conferences & events
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Smarty provides address validation, autocomplete, geocoding and reverse geocoding services covering addresses in over 240+ countries.
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Kahoot! makes it easy to create, play and share fun learning games in minutes—for any subject, in any language, on any device.
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Free Zip Code API - Free Postal Code Validation | Zipcodestack
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Audience response system that uses mobile phones, twitter, and the web. Responses are displayed in real-time on gorgeous charts in PowerPoint, Keynote, or web browser.
Compare Poll Everywhere to Sli.do or ZIP Code API:

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