Speak Thai.
From the very first lesson.
The only learning app built specifically for Thai: live tone analysis via your microphone, Thai script + handwriting recognition, and scientific FSRS repetition. 51 lessons. Fully guided.
Click a card to listen:
Wrong tone = wrong word. Pasaa trains your ear and your voice.
The problem
Thai is not French.
Generic apps fail here.
Thai is FSI Category IV — one of the hardest languages for speakers of European languages. Not because it's so complex, but because it's radically different on three fronts from everything you know.
5 tones, no shortcuts
Thai is a tonal language. Say maa with the wrong tone and you say "horse" instead of "come". Duolingo doesn't train this. Pasaa analyses your pitch curve live via your microphone.
Its own script, its own logic
44 consonants, 32 vowels, 4 tone markers — and the tone of a word depends on the consonant class. Once you understand that, you crack the system. Track 2 teaches you to read, write and understand why each word has that tone.
กขคง
mid class → high → low → low
Register is everything
"I" is not neutral in Thai. ผม is formal (male), เรา is informal, หนู is deferential. Pasaa shows register badges on every sentence so you never accidentally sound rude.
Try it yourself
How good is your language instinct?
3 quick questions. No account needed.
Question 1 of 3
สวัสดี — what does this mean?
Free trial lesson
Experience Pasaa in 5 minutes
Discover the 5 tones, learn your first sentences, and listen to real Thai audio — no account needed. At the end you'll receive a personalised study plan by email.
- ✓ Learn your first greeting: สวัสดี
- ✓ Discover how tones work through real words
- ✓ Learn กิน ข้าว — eat and rice — with audio
- ✓ Receive your personalised study plan by email
5
minutes
✦ No credit card
✦ No account needed
✦ Start right away
Technology
Built for real learning
No multiple-choice flashcards. Pasaa uses real speech analysis, handwriting recognition and scientific repetition — the three things that make Thai genuinely hard.
Tone feedback
Speak into your microphone. Pasaa records your voice and compares your pitch curve to a native speaker recording. You get a score from 1 to 5 and specific feedback on exactly what to adjust.
Handwriting recognition
Draw Thai characters on the canvas. The DTW algorithm evaluates stroke order and shape — not just the final result. Writing exercises also appear in your FSRS repetition so reading and writing grow together.
FSRS repetition
The scientific FSRS algorithm (v5) calculates exactly when you're about to forget a word and schedules review at that precise moment. Not earlier — that's wasted time. Not later — that's forgetting. Every lesson starts with a warm-up of words you're close to losing.
AI conversation partner Premium
Practice without limits with a native Thai AI conversation partner at any level — from basic sentences to small talk about daily life. Available 24/7. No embarrassment. Just practise until it sticks.
What you'll learn — a taste of the curriculum
The 5 tones
Free
Sounds & pronunciation
Free
Sentence patterns
Free
Greetings
Free
Cultural primer
Free
Food & drink
Premium
Numbers & time
Premium
Transport
Premium
Housing & renting
Premium
Consolidation
FreeTwo learning paths
Speaking and reading. Both.
Track 1 teaches you to speak and listen. Track 2 unlocks the script. Once you know the consonant classes (Track 2 Part A), you understand why each word has that specific tone — that's the big aha moment.
Track 1
51 lessonsSpeaking & Listening
From zero to fluent spoken Thai. Tone correction in every lesson.
ช่วยด้วย ตำรวจ โรงพยาบาล
ข้าว ข่าว มา ม้า หมา
aspiration, vowel length, final consonants
ผม เป็น อยู่ มี ได้ อยาก ชอบ ต้อง
เกรงใจ · สนุก · ไหว้
สวัสดี ขอบคุณ ครับ ค่ะ
FSRS repetition of everything
· Numbers, time & classifiers
· Food & drink
· Housing & renting
· Transport & directions
· Health & medical
· Banking & money
23 lessons · ~12 hours
· Registers (formal vs informal)
· Small talk
· Feelings & situations
· Real speech (natural tempo)
12 lessons · ~7 hours
Phases 4–6: coming soon
Extended daily life → Fluent → Near-native
Track 2
35 lessonsReading & Writing
From zero to fully literate Thai. Unlocks after Module 0.
· 32 vowel forms (position, short/long, combinations)
· Tone rules — live & dead syllables
· Reading without romanisation (end goal)
· 44 characters via handwriting recognition (stroke order)
· Thai keyboard — Kedmanee layout
· Writing exercises appear in Track 1 SRS
🔗 The big aha moment
Once you complete Part A, you understand why each word has that tone. The consonant class determines it. Only then does everything sound logical — and you learn ten times faster.
Comparison
Why not Duolingo?
Duolingo doesn't offer Thai at all. For a tonal language with its own script, you need an app built specifically for it.
| Feature | Pasaa | Duolingo | Pimsleur |
|---|---|---|---|
| Live tone analysis (microphone) | ✓ | ✗ | ✗ |
| Thai script learning (reading) | ✓ | ✗ | ✗ |
| Handwriting recognition | ✓ | ✗ | ✗ |
| Scientific FSRS repetition | ✓ | ✗ | ✗ |
| AI conversation partner (Thai) | ✓ | ✗ | ✗ |
| Register awareness (formal/informal) | ✓ | ✗ | ✗ |
| Free to start | ✓ | ✓ | ✗ |
| Premium price per month | €12,99 | — | €14,95 |
Comparison based on publicly available product information, March 2026.
Pricing
Start for free. Upgrade when you're ready.
14 lessons (~7 hours) completely free. No credit card.
Free
€0
Forever
- ✓Tones, sounds, greetings & sentence building (14 lessons)
- ✓Track 2 first 3 lessons
- ✓Basic FSRS repetition
- ✓Live tone analysis
- ✓Register badges
Monthly
€12.99
per month · cancel anytime
- ✓Everything in free
- ✓Track 1 complete (31 extra lessons)
- ✓Track 2 complete (35 lessons)
- ✓AI conversation partner (unlimited)
- ✓Visual pitch graphs
- ✓Offline mode
Annual
€7.50
per month
€89.99 per year
Save €66 — 42% off
- ✓Everything in monthly
- ✓Priority access to new content
- ✓Male and female native speaker voices
- ✓Detailed progress analysis
Questions
Frequently asked questions
How long does it take to learn Thai?
Thai is FSI Category IV — one of the hardest languages for speakers of European languages. At 30 minutes a day you complete Phase 1 in ~2–3 weeks. All of Track 1 (~50 lessons) takes ~6–8 months. Social fluency (with immersion in Thailand) totals ~800–1,100 hours. Pasaa guides the first ~40 hours in a structured way; the AI partner and immersion in Thailand fill the rest.
Is it really free to start?
Yes. 14 lessons (~7 hours of content) are completely free — no credit card. You learn the 5 tones, sounds, greetings and basic grammar, and experience the full lesson structure including tone analysis.
Why is Paiboon+ romanisation used?
Paiboon+ is the modern standard for Thai romanisation: à = low tone, â = falling tone, ǎ = rising tone, á = high tone, a = mid tone. It is consistent, intuitive, and the most widely used in current Thai learning tools. Thai script is always shown alongside the romanisation — never alone.
Do I need special equipment?
Just a modern browser with a microphone. Tone analysis works best in Chrome (Web Audio API). Handwriting recognition works on any device with a touchscreen or mouse. No app download required.
What is FSRS and why is it better?
FSRS (Free Spaced Repetition Scheduler v5) is the most accurate repetition algorithm available — scientifically tested on millions of cards. It calculates exactly when you're about to forget a word and schedules review at that precise moment. Not earlier (wasted time), not later (forgotten). Every lesson starts with a warm-up of words you're close to losing.
What are register badges?
Every sentence and word has a situation label: "with friends", "with older Thais", "at the market", "formal context", "business". They are visible from lesson 1 — so you never accidentally pick up wrong usage. The explanation of the register system itself comes in Module 8 (Phase 3), but the badges are always there.
What is the crossover moment between Track 1 and Track 2?
After Track 2 Part A (consonant classes) you understand why each word has that specific tone. The consonant class (low/mid/high) together with any tone markers determines the tone. This is the big aha moment: tones become logical rather than arbitrary. After that you learn new words ten times faster.
Ready to start?
14 lessons free.
No credit card.
Start today. Complete Phase 1 in 2–3 weeks at 30 min/day.
Start for free →Tones, sounds & basic grammar free · Upgrade when you're ready
Discover more about learning Thai
Learn Thai — complete guide
From absolute beginner to fluent Thai. Tones, script, method and timeline.
Learn Thai script
The Thai alphabet: 44 consonants, 32 vowels and 3 consonant classes.
Thai pronunciation
Everything about the 5 tones, Paiboon+ romanisation and tone sandhi.
Blog — Thai learning tips
Practical articles, linguistics and stories from people learning Thai.