The Lovable of Voice AgentsOral Language Proficiency Assessment Agent
Assess spoken language ability at scale. An AI agent conducts structured oral tests, evaluates responses, and delivers proficiency reports automatically.
Get notified when voiceblox.ai launches in the browser
Built for this workflow
Everything you need to design, test, and deploy your voice agent, visually.
Structured oral test flow
Design listening, speaking, and comprehension exercises with Burst nodes per proficiency level.
Adaptive difficulty
Branch to harder or easier questions based on response quality using IfElse nodes.
LLM-powered scoring
Configure the LLM to evaluate vocabulary, grammar, and fluency and assign a score per response.
Proficiency report
Generate a per-candidate proficiency report and push it to your LMS or HR system via webhook.
Multi-language support
Assess English, Spanish, French, and 30+ languages by configuring TTS and STT providers.
AI-built test flow
Describe the proficiency framework (CEFR, IELTS-style) and the AI builds the full test conversation.
The tightest feedback loop
Spin it up. Call it. Refine until it’s right.
Generate from a prompt
Describe the voice agent you want, like 'Build a pitch practice bot', and the AI creates the full conversation flow instantly.
Edit visually on the canvas
Drag, drop, and connect nodes to reshape the conversation flow exactly how you want it.
Edit it by prompting
Describe what you want to change in plain language and watch the agent update in real time.
Test it immediately
Talk to your agent right inside the builder - no deployment needed.
Improve a response you didn't like
When the agent says something off, click on that message in the conversation panel to correct it.
Deploy directly from the app
When your agent is ready, deploy it with a single click. No extra tools or setup required.
Share it with anyone
Generate a share link and send it to anyone. They can test your agent directly on voiceblox.ai, no app install needed.
Common use cases
English proficiency screening for job applicants
CEFR oral assessment for language schools
Corporate language training progress checks
Immigration language requirement verification
University foreign language placement tests
Start building for free
Open source and self-hostable. Read the documentation to get started in minutes.