What makes diffray different from other AI code review tools?

diffray uses multi-agent intelligence instead of single-model AI. Multiple specialized agents work together - Security Agent, Performance Agent, Architecture Agent, and Consistency Agent - each expert in their domain. This coordinated approach reduces false positives by 87% and catches 3x more real bugs compared to traditional single-agent tools like GitHub Copilot or CodeRabbit.

How does multi-agent AI code review work?

Multi-agent AI code review deploys specialized agents that work in parallel, each focused on a specific domain: security vulnerabilities, performance bottlenecks, architectural patterns, and code consistency. Unlike single-model approaches that suffer from context dilution, each agent maintains deep expertise in its area. Research shows this approach improves bug detection by 3x while reducing noise.

Is diffray free for open source projects?

Yes, diffray is completely free forever for open source projects. We support the open source community with full access to our multi-agent code review platform, including all specialized agents, unlimited reviews, and priority support.

What programming languages does diffray support?

diffray supports all major programming languages including TypeScript, JavaScript, Python, Go, Rust, Java, C#, Ruby, PHP, and more. The multi-agent system is language-agnostic and adapts its analysis to language-specific patterns and best practices.

How does diffray integrate with GitHub?

diffray integrates seamlessly with GitHub through a GitHub App. Once installed, it automatically reviews every pull request, posting actionable comments directly on the PR. Setup takes less than 2 minutes with no configuration required. Enterprise teams can also use diffray CLI for local reviews before pushing code.

What is the difference between diffray and CodeRabbit or GitHub Copilot?

While CodeRabbit and GitHub Copilot use single-model AI that can hallucinate and produce false positives, diffray employs multi-agent intelligence where specialized agents cross-validate findings. This results in 87% fewer false positives. Additionally, diffray provides full codebase awareness, custom rule support, and agent memory that learns from your team's patterns.

Can diffray detect security vulnerabilities?

Yes, diffray's Security Agent is specifically trained to detect OWASP Top 10 vulnerabilities, injection attacks, authentication flaws, and sensitive data exposure. It analyzes code in context of your entire codebase, reducing false positives while catching real security issues that static analysis tools miss.

How much does diffray reduce code review time?

According to our customer data, teams using diffray reduce PR review time by 73% on average - from 45 minutes to 12 minutes per week. This is because diffray's multi-agent system produces 87% fewer false positives, so developers spend time on real issues instead of filtering noise.

What is the developer action rate on diffray comments?

diffray achieves a 98% developer action rate on its comments, compared to industry average of 15-20% for traditional AI code review tools. This high engagement is due to our multi-agent approach that eliminates noise and surfaces only actionable findings with confidence scores.

How does diffray handle duplicate comments?

diffray guarantees zero duplicate comments through its intelligent deduplication system. Unlike single-agent tools that often flag the same issue multiple times across a PR, diffray's agents coordinate to consolidate findings and present each issue exactly once with full context.

Does diffray store my code?

No, diffray never stores your source code. Code is processed in memory during the review and immediately discarded. We are SOC 2 compliant and your code is never used for AI training. Enterprise customers can also use our on-premise deployment option for complete data sovereignty.

How does diffray compare to GitHub Copilot code review?

While GitHub Copilot uses a single AI model for code review, diffray employs specialized multi-agent intelligence. Research shows multi-agent systems catch 3x more real bugs while producing 87% fewer false positives. diffray also provides full codebase awareness, custom rules, and agent memory - features not available in Copilot's code review.

Does diffray understand TypeScript generics?

Yes. diffray understands advanced TypeScript features including generics, conditional types, mapped types, and template literal types. It validates proper type constraints and usage.

Can diffray enforce strict TypeScript settings?

Yes. diffray validates code against strict mode requirements including strictNullChecks, noImplicitAny, and other compiler options for maximum type safety.

Does diffray check for type assertion abuse?

Yes. diffray flags unsafe type assertions (as any, as unknown), unnecessary type casts, and recommends type guards and narrowing for better type safety.

TypeScript Expert

AI Code Review for TypeScript

diffray understands TypeScript. Generics, strict mode, type guards — AI-powered review for type-safe applications.

Node.js18+

Deno1.x

Bun1.x

NestJS10.x

tRPC10+

Built for TypeScript Developers

AI agents that understand TypeScript's type system at a deep level.

Type Safety

Catch type errors, validate generics, and enforce strict mode patterns.

Strict null checks
Generic constraints
Type narrowing

Runtime Safety

Find issues that TypeScript compiler misses but cause runtime errors.

Type assertion abuse
Implicit any
Unsafe casts

Security

Detect security vulnerabilities in full-stack TypeScript applications.

Input validation
SQL injection
XSS prevention

Performance

Identify type-level performance issues and build optimization problems.

Complex types
Bundle impact
Tree shaking

Common TypeScript Issues We Catch

Type assertions (as any)

Bypasses type safety, runtime errors

Flags unsafe casts, suggests type guards

Missing null checks

Cannot read property of undefined

Validates strictNullChecks patterns

Implicit any in generics

Type information loss, bugs

Enforces explicit generic constraints

Unsafe type predicates

Incorrect type narrowing

Validates user-defined type guards

Custom Rules for Type Safety

Enforce your team's TypeScript standards. Ban unsafe patterns, require strict types, ensure consistency.

Ban 'as any' and unsafe type assertions
Require explicit return types on exports
Enforce branded types for IDs
Validate Zod/io-ts schema usage

.diffray/rules/typescript.yaml

rules:
  - id: ts_no_unsafe_any
    agent: bugs
    title: No unsafe type assertions
    description: Avoid 'as any' and prefer
      type guards or unknown
    importance: 9
    match:
      file_glob:
        - '**/*.ts'
        - '**/*.tsx'
    checklist:
      - No 'as any' assertions
      - Use type guards for narrowing
      - Prefer unknown over any
    tags:
      - typescript
      - type-safety
      - strict-mode

TypeScript FAQ

Build Type-Safe Apps

Join TypeScript teams using diffray for expert AI code review.

Strict mode validation

Generics checking

Type guard validation

Explore More Solutions

React & Next.js

Hooks & components

Concurrency & microservices

SaaS

Multi-tenant & APIs

Startups

Ship fast & safe

View all solutions