Have the conversation
Pick a scene and start talking. The AI stays in character, at your level, in the right register, and waits patiently while you find the words.
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Speak it. Not just study it.
Renza is an AI partner you actually talk to. Real spoken practice in Japanese, Korean, Spanish, French and German, at your level, with a coach-quality report after every call.
15 minutes every month. No card required.
One ten-minute loop, and it starts to stick
Read your report
Within seconds of hanging up: what you did well, what to fix, exactly how a native would have said it, and the vocab and grammar to study next.
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Drill your own mistakes
Every correction becomes a flashcard built from what you actually got wrong. Three minutes a day, and it starts compounding.
Learn morePractice the conversations you keep avoiding
Start with a ready-made scene or build your own. Each one comes with a setting, a character, a goal, and the right register baked in, so you practice the real thing, not multiple choice.
Order at a café
Meet a new friend
A job interview
Check into a hotel
Dinner with the family
Ask for directions
A doctor's visit
Apologize to your boss
Build your own
Five languages. One subscription.
Learn one at a time, switch any time. Tell us your level, whether that’s JLPT, TOPIK or CEFR, and the AI stays inside it. Your progress in each language is saved.
Browse languagesAvailable now
あ
한
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ß
People who finally started talking
Read more storiesLearners
MayaLearning Japanese before a move to Tokyo
“I'd been studying for two years and still froze the second anyone spoke to me. Ten minutes a day with Renza and the freezing just… stopped. The first time I ordered coffee in Tokyo for real, it felt like nothing.”Read full story
MayaLearning Japanese before a move to Tokyo
You talk. It listens, and talks back.
Speak naturally and your partner replies in character, at your level, in the right register. It never corrects you mid-call. Pauses are fine, fumbling is the point. Stuck? Ask it to slow down, repeat, or switch on English help.
See how a call worksコーヒーを一つお願いします。
Un café con leche, por favor.
처음 뵙겠습니다.
Je voudrais réserver une table pour deux.
Können Sie das bitte wiederholen?
はじめまして、よろしくお願いします。
¿Tienen una mesa libre?
コーヒーを一つお願いします。
Un café con leche, por favor.
처음 뵙겠습니다.
Je voudrais réserver une table pour deux.
Können Sie das bitte wiederholen?
はじめまして、よろしくお願いします。
¿Tienen una mesa libre?
Questions, answered
Is this just a chatbot?
No. A general AI assistant is brilliant, but it does not hold your level, stay in a scenario, give you a structured report, track the mistakes you keep making, or build a review deck from them. Renza is built to do nothing but that. It is the difference between asking an AI things and having a coach.
Will I become fluent?
Renza will not make you fluent on its own. Nothing will. But the thing blocking most people is not knowledge, it is never actually speaking. We fix that part, in short sessions you can do every day.
Do I need a microphone?
Yes. Renza runs in your browser and we check your mic when you sign up. Headphones help, but any working mic is enough.
What if I am a complete beginner?
Start at A1, N5, or TOPIK 1. The first scenarios are extremely gentle, the AI scaffolds in the target language, and you can leave English help on while you find your feet.
Can I switch languages?
Yes, any time from Settings. Your progress is saved separately for each language, so switching back puts everything exactly where you left it.
Is my call recorded?
Audio is processed to generate your transcript and report. You can delete your data and your account any time from Settings. See the privacy policy for retention details.
Can I cancel any time?
Yes, from Settings. No retention emails, no haggling.
The conversation you’ve been avoiding is ten minutes away
Try it free15 minutes a month, free. $19/mo unlocks 120. Cancel any time.