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Powered by Claude AI + Whisper

Your students
practice.
You see the
results.

AI-powered pronunciation feedback built for language tutors. Students get real coaching between sessions — you get a weekly report showing exactly where they need help.

Book a demo → Try it live
24/7
Practice access
0 setup
For students
Weekly
Tutor reports
AI processing live
Weekly report — May 2026 Live
MK
Maria K.
English → Spanish
82%
SL
Sven L.
Mandarin → English
67%
KT
Keiko T.
Japanese → English
91%
AP
Arjun P.
Hindi → English
74%
48
Recordings
+14%
Improvement
4
Students
Why VerbalStack

AI that actually understands pronunciation.

Not a generic chatbot. Not a consumer app. A purpose-built AI feedback system for professional language tutors.

🧠
Claude AI feedback
Anthropic's Claude analyzes each recording and delivers warm, curriculum-aware feedback — tuned to your teaching style, not generic advice.
✓ Strong rhythm
△ Work on 'th'
→ Mirror practice
🎙️
Whisper transcription
OpenAI's Whisper handles any accent, any browser, any device. 99 languages. Your students just click and speak — no setup required.
📊
Weekly reports
Every week you receive a summary of each student's sessions. See what they practiced, where they struggled, and how they're improving.
Mon 9am ✓
Tue 2pm
Wed 11am ✓
Thu 3pm
Fri 10am ✓
0+
Languages supported by Whisper AI
0%
Browser-native — no student app required
0/7
Students practice between every session
How it works

Three steps. Zero extra work.

VerbalStack runs in the background. Students practice, the AI analyzes, you get the data.

01
Student records
Students open their practice link and read a sentence aloud. No app download, no account — just click and speak in any browser on any device.
🎙️
02
AI analyzes
Whisper transcribes the recording. Claude AI compares it to the target sentence and generates warm, specific feedback on pronunciation, accent, and fluency — tuned to your curriculum.
🤖
03
You get the report
Every week: a summary of each student's sessions — what they practiced, where they struggled, and how they're trending over time. No manual grading.
📈
What's included

Everything you need.
Nothing you don't.

Every VerbalStack setup includes the full stack — no hidden fees, no add-ons.

⚙️
Custom Setup
We configure the AI to your exact curriculum, vocabulary, target phonemes, and teaching style.
🎙️
AI Transcription
Whisper AI handles any accent, any browser, any device. Unlimited student recordings every month.
🤖
Claude Feedback
3-part AI feedback on every recording — what they did well, what to improve, and a specific tip.
📊
Weekly Reports
Progress summaries for every student, delivered to you every week without lifting a finger.
🔄
Maintenance
Updates, new vocabulary, and sentence sets added monthly. Your tool stays current with your curriculum.
📧
Direct Support
Email support with 24-hour response. You're not a ticket — you're a client.
🔒
Enterprise-grade AI
Built on Anthropic's Claude and OpenAI's Whisper — the same models powering the world's best AI products.
⚡
Deployed in days
Your custom tool is live within one week of onboarding. No long timelines, no back-and-forth.
🎯
Built for tutors
Not a generic app. Every feature is designed around how professional language tutors actually work.
Pricing

Simple. Transparent. No surprises.

No per-student fees. No complicated tiers. One setup, one monthly retainer, unlimited sessions.

$1,500
One-time setup fee
Paid once at onboarding. Covers custom curriculum configuration, AI feedback tuning, up to 20 student profiles, and a full onboarding call.
Book a demo →
$1,000
Monthly retainer
Per month, cancel anytime. Includes unlimited student recordings, weekly progress reports, maintenance, updates, new vocabulary monthly, and direct email support.
Get started →
Live demo

Try it yourself.

Select your language, read the sentence aloud, and see the exact AI feedback your students receive after every session.

I am speaking in...
Practice sentence
"The thirty-three thieves thought that they thrilled the throne throughout Thursday."

Record yourself

Click to start · Chrome required

// AI feedback output
Your AI-generated pronunciation feedback will appear here. This is exactly what every student sees after each practice session.
Claude AI analyzing...
Get in touch

Ready to get started?

Book a 20-minute demo or send us a message. No pressure, no commitment — just a look at what VerbalStack can do for your students.

📧
📅
💼
LinkedIn: VerbalStack
⏱️
Response time: within 24 hours

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