Spoiler: the Aussie one’s keen
Ubigi vs ZenSim Japan - Which Is Better?
Comparing Japan eSIMs and thinking about Ubigi? ZenSim is Australian owned, has outrageously good reviews and we’re also cheaper on the plans most travellers actually buy - but don't take our word for it, see the comparison below.
4.9
(311)
Why ZenSim over Ubigi?
Ubigi is a well-known travel eSIM provider with plenty of data options, but their site can be confusing and they don’t show AUD pricing, which can lead to bank fees. Their “unlimited” Japan plan is also capped at 60GB for the whole month, so it’s not truly unlimited.
ZenSim keeps things clearer with transparent pricing, daily fair-use caps that reset every night, unlimited hotspotting, and easy multi-country top-ups in the app. With better reviews, friendlier support, and cheaper key plans like 30-day unlimited at A$94.50 vs Ubigi’s A$106, ZenSim offers better value for Aussie travellers.
*AUD pricing has been calculated based off the current AUD/USD rate
Ubigi vs ZenSim Japan Comparison
| Feature | ZenSim | Ubigi |
|---|---|---|
| Unlimited 30 Day Plan | A$94.50 3GB/day | A$106 60GB/month |
| 20GB-25GB 30 Day Plan | A$38 | A$51 |
| 10GB 30 Day Plan | A$26 | A$27 |
| Customer reviews | 4.9 / 5 ⭐ | 4.1 / 5 ⭐ |
| Company based in | Australia | France |
| Unlimited hotspotting | ✅ | ✅ |
| Supports AUD pricing | ✅ | ❌ |
| Unlimited Fair-use policy | 3GB/day (resets at midnight) | 60GB month (doesn't reset) |
Save money with our
Japan eSIM Plans
Unlimited hotspot
Top ups available
Data-only - no phone number
Their app is great!!! I wanted to give ZenSim a try and I am glad I did. This app has worked great, easy set up and simple to manage, cool colours and fun copy writing.App store review by Mariale0723- Great service, answered all my questions without a bother. Highly recommended, especially now since the Vodafone Optus deal.Product Review by Steve G
- Amazing service – Best provider got connected straight away no delay. Awesome customer service always get help if I need help.Product Review by Matthew R
- I wish I heard about this product sooner, everything is on point, the price, the service, ease of use and also very reliable.Product Review by Rambod-88
- Zensim are amazing! Zensim was the easiest company I've ever signed up to. The data speeds are super fast. The customer service is outstanding. I couldn't rate them highly enough.Product Review by Paris B
- Don’t hesitate! – Great service, exceptional customer service! When leaving Telstra find customer id not acc number from a bill.Product Review by Glenn B
- Impressive in every way! Surprisingly reliable with fast data speeds. Loved the branding and the price is reasonable. Highly recommend.Product Review by Abhay
- Setting a new gold standard for cell phone carriers. The UX and UI of the website and app are first class. Ported my number from Vodafone within minutes. Set up was so easy. Very, very impressed.Product Review by Andy
- Extremely fast sign up/switching process, I accidentally entered incorrect information and they resolved it for me in minutes. App is tight, super clear simple language.Product Review by Jack
- Their app is great!!! I wanted to give ZenSim a try and I am glad I did. This app has worked great, easy set up and simple to manage, cool colours and fun copy writing.App store review by Mariale0723
- Great service, answered all my questions without a bother. Highly recommended, especially now since the Vodafone Optus deal.Product Review by Steve G
How to use travel esims
How it works
If you haven't used a travel eSIM before, you're in for a treat. It only takes a few minutes to setup and it's a fraction of the cost of roaming! See WTF is eSIM.
1. Quick phone check
Let's make sure your phone's on board. Our eSIM compatibility checker has all of the answers.
2. Choose a plan, enter your details
Choose a plan for your destination, enter your details and your payment information.
4. Plan activated on arrival
Enjoy your data as soon as you land. Check your usage in the ZenSim app.
Japan data plans from A$Infinity
Ditch the roaming costs and save coin with our Japan travel eSIM plans.
Reliable 4G/5G connection
Powered by the best networks in Japan.
Keep your current number
You can have multiple eSIMs installed and switch them on and off as you like.
eSIM compatibility checker
See our eSIM compatibility checker to makes sure your phone has got what it takes.
The nitty gritty
FAQs
Sure, Ubigi is a well-known travel eSIM provider with a wide range of plan sizes in Asia. However, if you want to save on the plan prices, care about customer reviews, don't want your unlimited to be capped at 60GB for the month, or want to support an Aussie company, then ZenSim is the one for you.
Mainly because ZenSim is cheaper across the most common plans and comes in with a higher customer review rating which matters! On top of that, ZenSim offers unlimited hotspotting, clear daily fair-use caps that reset nightly, transparent AUD pricing, and friendlier Aussie-based support.
Ubigi’s unlimited 30 day plan is capped at 60GB for the entire month, so it behaves more like a 60GB monthly pack than unlimited. ZenSim has a speed cap of 3GB/day on unlimited plans which equates to 60GB for the month but the difference being it resets every day. So you have unlimited access every single day regardless of the usage the day before.
Yep! Both allow hotspotting in Japan and both have no limits on how much you can hotspot.
Both providers connect to strong Japanese networks though you’ll get better overall value with ZenSim thanks to cheaper pricing.
Yep! ZenSim plans across the 3 plans we compared (10GB, 20-25GB, Unlimited) for 30 days are all cheaper than their Ubigi counterparts. For example Ubigis unlimited plan comes in at A$106 vs ZenSims which is A$94.50.
