Katie AI vs Duolingo: which is better for practising English speaking?
By the Katie AI team · Updated
The short answer
Choose Duolingo if you want a free, game-like daily course, especially as a complete beginner. Choose Katie AI if your goal is to speak English out loud, fluently, in real situations. Duolingo is mostly tapping and reading. Its AI speaking features (Video Call and Roleplay) need the top Max tier. Katie is built around speaking from the first minute, with a correction on every sentence. Katie is an AI speaking coach for professionals: it practises the English you need at work, remembers your past conversations and builds a learning path around your day-to-day life.
What makes Katie AI different
It remembers you
Talking to Katie feels like talking to a person who knows you. She remembers your previous conversations, so there is real continuity: each session picks up where the last one ended, and you never have to repeat yourself.
A learning path built around your life
Katie picks topics from what you actually need, like a job interview, client calls or travel, and teaches the phrases and vocabulary for them. No generic topics or curriculum that mean nothing to you. Your learning path fits your day-to-day life.
Real-time grammar correction on every sentence
You talk out loud and Katie fixes your grammar, word choice and pronunciation as you go, and explains why, so the fix sticks.
Built for English at work
Meetings, client calls, presentations, job interviews and small talk with colleagues. Practise the exact situations from your job, with the phrases and vocabulary you need, as often as you like.
Katie AI vs Duolingo at a glance
- What it is
- Katie AI: AI English speaking coach for professionals. Practise the English you need at work and in daily life with a tutor that remembers you and corrects every sentence. Unlimited practice, 24/7.
- Duolingo: Free gamified language course. The Max tier adds AI Video Call and Roleplay.
- Free plan
- Katie AI: No (free speaking test)
- Duolingo: Yes
- Free trial
- Katie AI: 3 days
- Duolingo: 14 days (Super)
- Languages
- Katie AI: English only
- Duolingo: 40+ languages
- Best for
- Katie AI: Professionals who want to speak English confidently at work: meetings, client calls, presentations and interviews, and in daily life
- Duolingo: Casual learners who want a daily game and some speaking on top
| Katie AI | Duolingo | |
|---|---|---|
| What it is | AI English speaking coach for professionals. Practise the English you need at work and in daily life with a tutor that remembers you and corrects every sentence. Unlimited practice, 24/7. | Free gamified language course. The Max tier adds AI Video Call and Roleplay. |
| Free plan | No (free speaking test) | Yes |
| Free trial | 3 days | 14 days (Super) |
| Languages | English only | 40+ languages |
| Best for | Professionals who want to speak English confidently at work: meetings, client calls, presentations and interviews, and in daily life | Casual learners who want a daily game and some speaking on top |
Free plans and trials from the US App Store and each app's website, as of October 20, 2026.
Choose Katie AI if…
- You want a tutor that remembers your past conversations and your goals, so you never start from zero.
- You want a learning path built around your daily life, with phrases and vocabulary you will actually use, not a generic curriculum.
- Your goal is speaking, not tapping and reading.
- You want feedback on everything you say.
- You want to practise real situations, like interviews and meetings.
Choose Duolingo if…
- You want a free app.
- You are a complete beginner and want a course to start with.
- You want a game that keeps a daily streak going.
Good to know before you choose
Duolingo: AI speaking (Video Call and Roleplay) is only in the top Max tier, and only in some courses.
Katie AI: Katie teaches English only, so it is not the pick if you are learning another language. It is built for people who already know some English, so complete beginners may want a beginner course first. If what you need most is someone to hold you accountable, or a teacher's judgement on your career or exam, a human tutor still wins.
Frequently asked questions
Does Duolingo help you speak English?
Duolingo's free course is mostly tapping, reading and listening. AI speaking practice comes with the top Max tier. Katie AI is built for speaking practice from the start.
What should I use with Duolingo to practise speaking?
An AI speaking tutor like Katie AI works well alongside Duolingo: use Duolingo for the basics and Katie for speaking out loud, with the phrases and vocabulary for your own topics.
Does Katie AI remember previous conversations?
Yes. Katie remembers what you talked about before and what you want to learn, so it feels like talking to a person who knows you, not starting over with a new app each time. It uses that to choose topics that matter to you and to pick up where you left off.
How we compared these apps
- We looked at the 11 English speaking apps and tutor services people compare most often: Katie AI, Speak, ELSA Speak, Loora, Praktika, TalkPal, Fluently, ChatGPT Voice, Cambly, Preply and Duolingo.
- For each one we checked its US App Store listing, its own website, and its most recent US App Store reviews, on October 20, 2026.
- Where an app does not publish something, we say "Not stated" instead of guessing.
- Each app's limit comes from its own website or from patterns in recent reviews. We make Katie AI, and we list a limit for Katie too.