IN THE LIVE LESSON
The teacher adapts.Notice the hesitation. Change the pace. Revisit the error—or let the learner keep speaking.REAL-TIME TEACHER-LED ADAPTIVE LEARNING TECHNOLOGY
Innovative
Based on research
TEACHER-LED
NOT ANOTHER AI TUTOR
A new intelligence layer for human-led language learning
Every lesson learns how to teach you better
During the lesson
Practise a phrase
Saved lesson
Teacher workspace
After-lesson review
Screens shown in English.
NAOMI — Naomi Animates Our Meaning into Identity — is the animated visual soul of LingoSide.
Good teachers already adapt in the moment. LingoSide is designed to keep what happened: the phrases that were hard, the corrections that helped and the moments that went well stay linked to the lesson they came from. The teacher decides what matters next.
AI should make teaching more powerful—and learning more human.
BETWEEN LESSONS
The learning path carries forward.Difficult moments stay linked to the lesson they came from, so they can come back at the right time, when the teacher decides.
LingoSide
During the lesson.And after.
During the lesson
Words, translation and help with your reply.
Follow the conversation
The teacher leads the conversation. LingoSide helps the learner follow it.
After the lesson
Exercises, flashcards and your lesson materials.
Lesson record
Return to the conversation, with its original words and translations.
Exercises
Open an exercise prepared by your teacher and work through it.
Flashcards
Recall a phrase, reveal the answer and rate how well you remembered it.
Saved phrases
Keep useful phrases together with their translation and lesson context.
Review
Find what to review and see when to return to each phrase.
Choose a dot to explore another view.
AI illustration · LingoSide app views with sample data
See it in action
Click and watch how it works.
Sign in to the demo account and watch a replay of a real LingoSide session — the transcript, the translation and the reply suggestions, exactly as the app produced them.
A replay of one recorded session, the same every time — not a live session.
Teacher + learner
Two sidecars. One for the learner. One for the teacher.
A sidecar is a small companion app that stays open beside your lesson. A learner needs private support that helps them speak on their own. A teacher needs to see what is happening and to keep the teaching decisions. One app for both would mix those jobs and pull attention away from the conversation.
01
Different work
The learner asks, “How can I understand and answer?” The teacher asks, “What should I notice and decide?”
02
Clear authority
AI can suggest an explanation or strategy. The teacher approves, changes or rejects it.
03
One shared record of the lesson
Both sidecars read the same record of the lesson instead of creating two competing versions of what happened.
The adaptive learning loop
Notice what happens in the lesson. Keep it. Use it next time.
- 01Observe the lesson
- 02Keep what happened
- 03Practise it later
- 04Teacher decides
- 05The next lesson adapts
What you get from LingoSide
Your teacher. AI on your side.
LingoSide sits beside the lessons you already have. It helps you follow the conversation, find your own reply and keep the language worth keeping — while your teacher makes every teaching decision.
-
During the lesson
Understand as you listen
Read what was just said with the translation right under it, while the conversation keeps moving.
Find your way into the reply
When you freeze, get a starting point for your own answer — and choose how much help you see.
-
Between lessons
Keep the language that matters
Save the phrases worth keeping from each lesson in one place, ready for later.
Practise your own material
Exercises built from your lessons: try to recall before you see the answer, with reviews spaced out over time.
-
Across lessons
Return to the lesson
Reopen an earlier session and the language you worked on, in the context it came from.
Remembers your earlier lessons
During a live lesson, LingoSide can bring back what happened in your earlier lessons — and if nothing was saved, it says so instead of inventing it.
For teachers
A clearer view of your students' learning
The teacher sidecar reads the same record of the lesson: earlier lessons with their transcript, plus the teaching material you upload and assign to each student.
Why LingoSide
Compare LingoSide with
Speak, Praktika and Duolingo adapt too — but only to what you do inside their app. LingoSide adapts to your real lessons with your own teacher, and never uses them to train AI.
The biggest difference
Every lesson learns how to teach you better
Speak adapts to what you do in Speak
Its lessons and reviews follow your level, goals and mistakes inside the app. It never sees your lessons with your own teacher.
LingoSide adapts to your real lessons
- Your lesson
- Your exercises
- Your next lesson
What you said, where you asked for help and the phrases you kept stay linked to the lesson they came from. They become your reviews and exercises, and your teacher can look back at the lesson before the next one. Each lesson makes the next one fit you better — and your teacher still decides what comes next.
Lesson memory: during a live lesson, LingoSide can bring back what happened in earlier lessons — and if nothing was saved, it says so instead of inventing it.
This is not model training: your lessons stay yours — they help you and your teacher and never train an AI model.
Compared on
SpeakSpeaking practice with an AI tutor
LingoSideA sidecar for lessons with a teacher
Who you talk to
Speak Tutor, an AI conversation partner
Your teacher — AI helps you on the side
What you practise
Expert-built lessons, personalised by AI
Reviews and exercises built from your own lessons
When it helps
Whenever you open the app, on your own
During your lessons and between them
Who decides what comes next
The app, from your level, goals and learning history
Your teacher
What you don't get with Speak
- No human teacher — you talk to an AI tutor
- You practise Speak's course, not the language from your lessons
- No help inside a real lesson with a person
- No one who teaches you decides what you work on next
- Your audio also develops Speak's own speech recognition — no opt-out is described
From the product's own pages: speak.com speak.com/privacy
What you get with LingoSide
- A real teacher leads; AI supports you while you speak
- Live transcript, translation and a way into your reply
- Reviews and exercises from your lessons, spaced out over time
- Your teacher's own materials, assigned to you
- Every lesson saved — reopen the conversation and the language you worked on
- Lesson memory — in the live lesson, LingoSide can bring back what happened in earlier ones
- Your lessons never train AI models — ours or our providers'. No recordings, no ads.
- Built for nine languages, in both directions
LingoSide is also building pronunciation feedback on the phrases you practise, for your teacher to review.
The biggest difference
Every lesson learns how to teach you better
Praktika adapts to what you do in Praktika
Its study plan follows your goals, interests and pace inside the app. It never sees your lessons with your own teacher.
LingoSide adapts to your real lessons
- Your lesson
- Your exercises
- Your next lesson
What you said, where you asked for help and the phrases you kept stay linked to the lesson they came from. They become your reviews and exercises, and your teacher can look back at the lesson before the next one. Each lesson makes the next one fit you better — and your teacher still decides what comes next.
Lesson memory: during a live lesson, LingoSide can bring back what happened in earlier lessons — and if nothing was saved, it says so instead of inventing it.
This is not model training: your lessons stay yours — they help you and your teacher and never train an AI model.
Compared on
PraktikaConversations with AI avatar tutors
LingoSideA sidecar for lessons with a teacher
Who you talk to
AI avatar tutors
Your teacher — AI helps you on the side
What you practise
Free conversation and a personal study plan
Reviews and exercises built from your own lessons
When it helps
Any hour you feel like talking
During your lessons and between them
Who decides what comes next
A study plan that adapts to your goals and pace
Your teacher
What you don't get with Praktika
- Your conversation partner is an AI avatar, not a person
- The study plan comes from the app, not from a teacher who knows you
- No help inside a real lesson with a person
- Practice isn't built from the conversations in your lessons
- Recordings and transcripts of your AI conversations are analysed to fine-tune Praktika's models
From the product's own pages: praktika.ai praktika.ai/privacy
What you get with LingoSide
- A real teacher leads; AI supports you while you speak
- Live transcript, translation and a way into your reply
- Reviews and exercises from your lessons, spaced out over time
- Your teacher's own materials, assigned to you
- Every lesson saved — reopen the conversation and the language you worked on
- Lesson memory — in the live lesson, LingoSide can bring back what happened in earlier ones
- Your lessons never train AI models — ours or our providers'. No recordings, no ads.
- Built for nine languages, in both directions
LingoSide is also building pronunciation feedback on the phrases you practise, for your teacher to review.
The biggest difference
Every lesson learns how to teach you better
Duolingo adapts to what you do in Duolingo
It sets the order and difficulty of its exercises from your answers in its course. It never sees your lessons with your own teacher.
LingoSide adapts to your real lessons
- Your lesson
- Your exercises
- Your next lesson
What you said, where you asked for help and the phrases you kept stay linked to the lesson they came from. They become your reviews and exercises, and your teacher can look back at the lesson before the next one. Each lesson makes the next one fit you better — and your teacher still decides what comes next.
Lesson memory: during a live lesson, LingoSide can bring back what happened in earlier lessons — and if nothing was saved, it says so instead of inventing it.
This is not model training: your lessons stay yours — they help you and your teacher and never train an AI model.
Compared on
DuolingoA course of bite-sized lessons
LingoSideA sidecar for lessons with a teacher
Who you talk to
Course exercises, plus AI characters on Duolingo Max
Your teacher — AI helps you on the side
What you practise
Interactive exercises in a structured course
Reviews and exercises built from your own lessons
When it helps
A few minutes a day, kept going by streaks
During your lessons and between them
Who decides what comes next
The course path, adjusted by the app as you go
Your teacher
What you don't get with Duolingo
- No human teacher — exercises and, on Duolingo Max, AI characters
- Duolingo's course, not the language from your own lessons
- AI conversation only on the paid Duolingo Max tier, and only in some courses
- No help inside a real lesson with a person
- Your recordings and transcripts may train Duolingo's own AI models
From the product's own pages: The Duolingo Method Duolingo Max duolingo.com/privacy
What you get with LingoSide
- A real teacher leads; AI supports you while you speak
- Live transcript, translation and a way into your reply
- Reviews and exercises from your lessons, spaced out over time
- Your teacher's own materials, assigned to you
- Every lesson saved — reopen the conversation and the language you worked on
- Lesson memory — in the live lesson, LingoSide can bring back what happened in earlier ones
- Your lessons never train AI models — ours or our providers'. No recordings, no ads.
- Built for nine languages, in both directions
LingoSide is also building pronunciation feedback on the phrases you practise, for your teacher to review.
Descriptions come from each product's own public pages and privacy policy, read in September 2026. Speak, Praktika and Duolingo are trademarks of their owners; LingoSide is not affiliated with them.
Multilingual by design
One product. Nine languages.
English · Polski · Deutsch · Español · Português · Italiano · Русский · Українська · Čeština
These are the languages LingoSide is built for — each meant to work in either direction, as the language you learn or the language you learn from.
Research-backed by design
The AI suggested. The tutor decided. More students mastered the topic.
Stanford ran a randomised trial of that arrangement in live tutoring. When a tutor asked for help mid-lesson, the tool offered three possible replies to send next; the tutor sent one, rewrote it, or used none of them. It never wrote to the student and never decided what the student needed.
Plus four percentage points.
Higher topic mastery overall
Students whose tutors had the tool were four percentage points more likely to pass the check at the end of the mathematics lesson than students in the control group.
Plus nine percentage points.
The largest gain where support mattered most
Students of the lowest-rated tutors gained nine percentage points — the suggestions counted for most where the tutor had the least experience to draw on.
Stress-tested, not cherry-picked
Built on research we first tried to break.
We gathered the science of how people really learn languages into one brief, then tried hard to prove ourselves wrong. Only the claims that survived get to shape LingoSide.
23
research areas reviewed, from memory science to speech decoding
261
verifiable claims extracted, each tied to a published source
171
unique sources, with meta-analyses weighted first
133
feature ideas mapped from the evidence into a phased plan
Define the category
A new operating model for adaptive learning.
REAL-TIME TEACHER-LED ADAPTIVE LEARNING strengthens the relationship a teacher and a learner already have. The lesson stays human; what happens in it, what the teacher decides and what the learner practises carry over from one lesson to the next.
Not LingoSide
Language apps
Adapt the course
They adapt prepared content to answers given inside the app.
Not LingoSide
Meeting assistants
Summarise the conversation
They capture what was said, but do not build a learning process.
Not LingoSide
AI tutors
Lead the conversation
They become the tutor instead of supporting the real teacher.
LingoSide
REAL-TIME TEACHER-LED ADAPTIVE LEARNING
Strengthens the relationship
It connects what happened in the live lesson, the teacher’s decisions and later practice — without taking over the lesson.
Human teacher + the live lesson + adaptive learning loop
LingoSide is an emerging e-learning and EdTech startup pioneering a new model called REAL-TIME TEACHER-LED ADAPTIVE LEARNING.
Join LingoSide
Bring real-time, teacher-led adaptive learning to your lessons.
Join the waitlist if you learn or teach through real conversations and want every lesson to improve what happens next.
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For teachers and schools
Build the next lesson from what happened in this one.
Tell us how you teach, what is hardest to carry between lessons and where this kind of teacher-led support could help.
This form is for teachers, tutors and language schools. Learners can use the waitlist above.