
Memrise
Busuu
Babbel
Anki
Lingvist
Rosetta Stone
Mondly
Duolingo is a free language learning app for iOS, Windows and Android devices. The app makes learning a new language fun by breaking learning into small lessons where you can earn points and move up through the levels. Read more about Duolingo.

Domains Monitor
zonefiles.io
Newly Registered Domains Lists
AllZonefiles.io
Domain-Monitor.io
DomainTools
WhoisXML API
Lists and datasets of registered domain names for 1,500+ TLDs, updated daily. Domain and reverse IP lookup, simple API.

Which is more popular?
Based on our record, Duolingo seems to be more popular. It has been mentioned 70 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | duolingo.com | netapi.com |
| Pricing | — | |
| Company | Startup from the United States · 500 - 999 employees · 2011 | Startup from Cyprus |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of Duolingo yet.
NetAPI tracks 380M+ active domain names in 1,500+ TLDs, both generic (gTLD) and country-code (ccTLD) zones. Full and newly registered domain lists, updated daily for most zones; deleted domain lists for zones published in full every day Detailed datasets: DNS, IP address, hosting country,...
What each product offers, as listed by its team.


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


Overall verdict
Why this product is good
Recommended for
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
Duolingo Review: Does it really work?
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How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing Duolingo and NetAPI.
NetAPI's answer:
Security and threat intelligence teams (newly registered and compromised domains), brand protection and anti-phishing services, sales and marketing teams building lead lists, SEO and web analytics companies, and researchers who need complete lists of registered domains.
NetAPI's answer:
NetAPI was founded by Slava Olesik, who earlier founded zonefiles.io (he sold it in 2017; its later owners shut it down in August 2025). NetAPI is his current project in the same field: domain lists and datasets for 1,500+ TLDs, a simple API and free open datasets. It is run by CodeRockers LTD, Cyprus.
NetAPI's answer:
Every zone in one subscription: 380M+ active domains in 1,500+ TLDs, newly registered domains every day, enriched datasets and lists by DNS provider and registrar. We also publish free datasets: the daily NetAPI Top 1M websites ranking and compromised domain and IP lists (CC BY 4.0).
NetAPI's answer:
Plain CSV files and a simple API, every TLD in one plan from $49 a month, daily updates, and a founder who has worked with domain data since zonefiles.io.
Share your experience with using Duolingo and NetAPI. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


For AI conversation practice, Duolingo Max is the tier to choose, and we'd call it a useful upgrade only if those extra features matter to you. It sits above the paid Super Duolingo tier rather than directly above the...
Our team of dedicated writers and language enthusiasts is committed to bringing you insightful content and expert advice to enhance your Duolingo experience. From language-learning tips to in-depth analyses of...
Language learning apps such as Duolingo, Babbel and others have millions of registered users worldwide. Duolingo alone has over 300 million registered users.
We have no reviews of NetAPI yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.


Duolingo: a language-learning app that uses points, levels, and rewards to keep you motivated. This is the most effective when you do it with your friends or a group of people who share your learning goals. I got really addicted to... Source: over 3 years ago
Hi! I wish I'd seen a post like this a few months ago. I would have been interested then. By now it's a little late for me. I just signed up for the 2 week free trial since that's about all the time I have left before I leave. If you... Source: over 3 years ago
If you want a guided course try Memrise or Duolingo. Source: over 3 years ago
Tracking NetAPI since Dec 2025.
When comparing Duolingo and NetAPI, you can also consider the following products.

Learn a new language with games, humorous chatbots and over 30,000 native speaker videos.
Compare Memrise to Duolingo or NetAPI:

List of all active domains in all zones. Registered domains database with daily updates, contact details and powerful API. ccTLD and gTLD zones with contacts and details.
Compare Domains Monitor to Duolingo or NetAPI:

Join the global language learning community, take language courses to practice reading, writing, listening and speaking and learn a new language. Learn English with busuu's .
Compare Busuu to Duolingo or NetAPI:

List of registered domain names updated daily
Compare zonefiles.io to Duolingo or NetAPI:

Babbel is a paid language learning service that aims to strike a balance between thoroughness and cost efficiency.
Compare Babbel to Duolingo or NetAPI:

Domain Index’s Newly Registered Domains List is an extensive daily compilation of newly registered domain names as they appear in the Domain Name System (DNS).
Compare Newly Registered Domains Lists to Duolingo or NetAPI: