FluentU and Sabi both help you learn a language from real videos, but they work differently. FluentU is a full learning platform with its own video library and mobile apps. Sabi is a browser extension that adds learning tools to the streaming services you already use.
Short on time? Here's a quick look at how they compare.
Feature | Sabi | FluentU |
|---|---|---|
Netflix | ✅ | ✅ |
YouTube | ✅ | ✅ |
Disney+ | ✅ | ❌ |
Prime Video | ✅ | ❌ |
Rakuten Viki | ✅ | ❌ |
Dual Subtitles | ✅ | Own videos only |
Word Translations | ✅ | ✅ |
In-Video Exercises | ✅ | ❌ |
Monthly Price | Free Trial / €1,84 | Free Trial / €10,73 |
FluentU is a language learning platform built around video content such as music videos, movie trailers, news and talks. Its library comes with interactive subtitles, word explanations and quizzes, and it also offers beginner courses and an AI tutor. You can use it on the web or through its iOS and Android apps, and a Chrome extension adds word lookups to Netflix and YouTube.
Sabi is a browser extension that works on Netflix, YouTube, Disney+, Prime Video and Rakuten Viki. It adds dual subtitles, word translations and exercises to the shows you're already watching, so you learn from full episodes and movies rather than a separate library.
— Works on the web, iOS and Android, using FluentU's own video library
— Its Chrome extension works on Netflix and YouTube
— FluentU says its Netflix extension only works in Google Chrome
— Works on Netflix, YouTube, Disney+, Prime Video and Rakuten Viki
— Works in Chrome, Edge, Brave and Opera on your computer
— Has no mobile app, so you'll need a computer
🎯 Key Point:
— If you want to learn on your phone, FluentU is the better fit. If you watch on Disney+, Prime Video or Viki, only Sabi works there.
— Curated videos for learners, especially helpful for beginners
— Interactive subtitles where you click a word to see its definition and examples
— Quizzes, separate from the videos, that test the words you've met in context
— Beginner courses and an AI tutor for speaking practice
— On Netflix, its extension shows the subtitles in the language you're learning, and you review saved words later in FluentU
— Dual subtitles that show your target language and your own language together
— Hover translations with grammar and example sentences
— Exercises inside the video, so you practice what you just heard without leaving the show
— Whisper AI subtitles created from the audio on Netflix, YouTube, Disney+ and Viki
🎯 Key Point:
— FluentU gives you more structure. Sabi lets you learn from whatever you actually want to watch.
— Cheapest monthly price at around €10,73
— 14-day free trial. FluentU's help center says the trial requires a payment method, and your subscription continues unless you cancel at least one day before it ends
— 20-day money-back guarantee
— Using the extension on Netflix also requires a Netflix subscription
— Cheapest monthly price at €1,84
— 7-day free trial with no payment information required, so nothing is charged automatically when it ends
— Requires your own streaming subscriptions for content
🎯 Key Point:
— FluentU's trial is twice as long, but Sabi costs far less and doesn't ask for payment details to start.
✅ Pros:
— Curated videos and beginner courses
— Mobile apps
— AI tutor for speaking practice
— Longer free trial
❌ Cons:
— Higher price
— Payment method required for the free trial
— Fewer languages
— No support for Disney+, Prime Video or Rakuten Viki
✅ Pros:
— Much lower price
— No payment details needed for the free trial
— Works on five streaming platforms
— 29 languages
— Exercises inside the video
❌ Cons:
— No mobile app
— No video library of its own
— You're a beginner who wants curated videos and a guided course
— You mostly learn on your phone
— You don't mind paying more for an all-in-one platform
— You want to learn from full shows and movies you already enjoy
— You watch on Disney+, Prime Video or Rakuten Viki
— You're learning a language FluentU doesn't offer
— You want a lower price and a trial that doesn't need payment details
FluentU's cheapest monthly price is around €10,73, and it has a 14-day free trial.
No. FluentU has a 14-day free trial, but its help center says the trial requires a payment method, and your subscription continues unless you cancel at least one day before it ends.
It can be, if you're a beginner who wants curated videos, courses and mobile apps. If you already watch shows on Netflix or other streaming services, Sabi gives you dual subtitles, word translations and exercises at a much lower price.
Yes. FluentU has a Chrome extension that adds word lookups to Netflix and YouTube. You need an active FluentU subscription and a Netflix subscription, and FluentU says its Netflix extension only works in Google Chrome.
FluentU lists Netflix and YouTube for its Chrome extension, but not Disney+, Prime Video or Rakuten Viki. Sabi works on all five.
If you want to learn from the shows you already watch, Sabi is a good choice. It works on Netflix, YouTube, Disney+, Prime Video and Rakuten Viki, has a 7-day free trial with no payment details required, and starts at €1,84 per month.