Sensei is the AI code analysis platform that gives you instant explanations, technical debt scoring, security vulnerability detection, and actionable improvement suggestions for any code snippet.
No credit card required|5 free analyses per month
Health Score
Grade: D - Needs Work
SQL Injection
Line 6: String interpolation in query
Plain Text Password
Line 8: No hashing used
No Error Handling
Missing try-catch block
Built for developers who care about code quality
From instant AI explanations to deep security scanning, Sensei gives your team the tools to write better, safer, more maintainable code.
Get plain English explanations of complex code logic, design patterns, and algorithms. Perfect for onboarding, code reviews, and understanding legacy codebases.
Quantify technical debt with an actionable 0-100 score. Track debt over time and get prioritized recommendations for what to fix first.
Automatically detect SQL injection, XSS, insecure auth patterns, and OWASP Top 10 vulnerabilities before they hit production.
Measure cyclomatic complexity, cognitive complexity, and maintainability index. Know exactly which functions need refactoring.
Get comprehensive analysis in under 10 seconds. No setup, no configuration, no CI pipeline changes needed — just paste and analyze.
Analyze JavaScript, TypeScript, Python, Go, Rust, Java, C++, and more. Sensei understands idioms and best practices for each language.
No complex setup. No dependencies. Just paste your code and get actionable insights instantly.
Copy and paste any code snippet into Sensei. We support 15+ programming languages with automatic language detection. Works with everything from a single function to entire modules.
Our AI engine evaluates code complexity, identifies security vulnerabilities, calculates technical debt, detects anti-patterns, and generates a comprehensive health score in seconds.
Receive a detailed report with a health grade (A+ to F), specific issues with line references, prioritized improvement suggestions, and clear explanations your whole team can understand.
Every analysis produces a comprehensive health score from 0-100, graded A+ through F. The score combines maintainability, complexity, and technical debt metrics into a single actionable number your team can track over time.
Complexity
Tech Debt
Maintainability
Score: 82/100 — Good quality with minor improvements suggested
SQL Injection Vulnerability
Hardcoded API Key Detected
Missing Input Validation
Console.log in Production
Sensei scans for OWASP Top 10 vulnerabilities, insecure coding patterns, hardcoded secrets, and common security anti-patterns. Each issue comes with severity rating, exact line reference, and a suggested fix.
Get started with 5 free analyses per month. Upgrade when you need more power.
Perfect for trying Sensei on personal projects
Get Started FreeFor developers who analyze code daily
Start Free TrialFor engineering teams and organizations
Contact SalesSee why thousands of developers trust Sensei for their code quality needs.
“Sensei caught a critical SQL injection vulnerability in our authentication module that we had missed across three manual code reviews. It paid for itself on day one.”
Sarah Chen
Senior Developer at DataFlow
“The technical debt scoring completely changed how we prioritize refactoring. We reduced our bug rate by 40% in the first quarter just by following Sensei's recommendations.”
Marcus Johnson
Engineering Manager at CloudScale
“As a tech lead onboarding new team members, Sensei's plain English explanations are invaluable. Complex legacy code that used to take days to understand now takes minutes.”
Emily Roberts
Tech Lead at NexGen Labs
“We integrated Sensei into our code review workflow and it's like having an extra senior developer on the team. The security scanning alone has prevented two potential data breaches.”
David Park
CTO at SecureStack
“I use Sensei every day when working with AI-generated code. It helps me understand what Copilot and ChatGPT write and catches issues before they make it into production.”
Lisa Wang
Full-Stack Developer
“The multi-language support is incredible. We work across TypeScript, Python, and Go — and Sensei understands the idioms and best practices for each one perfectly.”
Alex Rivera
Platform Engineer at DevOps Co
Everything you need to know about Sensei.
Sensei supports 15+ programming languages including JavaScript, TypeScript, Python, Go, Rust, Java, C++, C#, Ruby, PHP, Swift, Kotlin, and more. Our AI automatically detects the language and applies language-specific best practices and security patterns.
Sensei achieves a 95% accuracy rate in detecting code issues, security vulnerabilities, and quality metrics. Our AI models are continuously trained on millions of code samples and security advisories. We also provide confidence scores with each finding so you can prioritize your review.
Your code privacy is our top priority. Code submitted for analysis is processed in memory and stored only in your personal, encrypted analysis history. We never share your code with third parties, use it for training, or make it accessible to other users. You can delete your analysis history at any time.
The free plan gives you 5 code analyses per calendar month with full access to all features: AI explanations, health scoring, security scanning, technical debt analysis, and your complete analysis history. No credit card required to sign up.
The health score (0-100) is calculated from three weighted metrics: maintainability (code readability, structure, and documentation), complexity (cyclomatic and cognitive complexity), and technical debt (code smells, anti-patterns, and refactoring needs). The formula is: (maintainability + (100-debt) + (100-complexity)) / 3.
Sensei is designed to complement your code review process. Paste code from pull requests to get instant feedback on quality, security, and maintainability. Many teams use Sensei as a pre-review step to catch issues before human reviewers spend time, making reviews faster and more focused.
Sensei uses advanced large language models optimized for code analysis. Our AI engine is specifically fine-tuned for understanding code structure, detecting security vulnerabilities, evaluating complexity, and generating human-readable explanations across multiple programming languages.
Join thousands of developers using Sensei to understand, improve, and secure their codebases. Start analyzing code for free today.
Your code is always private and encrypted