AI Code Review

Slopo

A lightweight CLI tool for detecting non-exact code duplication using embedding models.

What is Slopo?

Slopo is a command-line tool that uses embedding models to identify similar code snippets across a codebase, focusing on non-exact duplicates that are hard to detect manually.

Slopo vs Similar AI Tools

Pricing ModelFreeFreeFreePaid
Free Credits
Key Features
  • Embedding-based similarity detection for non-exact duplicates
  • Supports Python, TypeScript, JavaScript, Java, Kotlin, C#, Go, Rust
  • Configurable similarity and reranking thresholds
  • Code review agent that analyzes git diffs and posts findings (read-only)
  • Documentation sync agent that updates Markdown docs to match code via PRs (docs-only, never auto-merges)
  • Autonomous QA testing agent that understands product from code and executes end-to-end flows with backend assertions
  • Reads repository structure without model calls (grep+find) to extract routes, services, and entities
  • Derives prioritized end-to-end business flows from code analysis
  • Runs each flow as an agent loop with Playwright browser driving and backend API assertions via token reuse
  • Free audit of codebase and knowledge base
  • Agentic code generation and refactoring
  • Senior engineer review on every PR
Pros
  • Detects non-exact duplicates that other tools miss
  • Supports multiple programming languages
  • Requires no manual test writing — QA agent derives flows from code
  • Deep autonomous testing with frontend and backend assertions
  • Open source and self-hosted, no vendor lock-in
  • Automatically understands application logic from code, not just UI
  • Pay only for shipped code, no retainer
  • Free audit with no obligation
Cons
  • Requires an external embedding API (e.g., Voyage AI)
  • Limited to languages with AST parsers
  • Requires setup of multiple dependencies (Node.js, Playwright, CLI tools)
  • Agent-based testing can be non-deterministic and slower than scripted tests
  • Requires manual setup of environment and dependencies
  • Not a hosted SaaS; operator must manage infrastructure
  • Not ideal for greenfield projects without scoping
  • Requires upfront deposit for work
Best For
  • Developers managing large codebases
  • Teams focusing on code refactoring
  • Developers and teams wanting automated, continuous code review and testing
  • QA engineers looking to reduce manual test script maintenance
  • Development teams needing automated end-to-end QA without writing test scripts
  • Projects with complex business flows where UI-only testing misses backend state bugs
  • Non-technical founders
  • Startups with overflowing backlogs

How to use Slopo?

  1. 1Install with 'uv tool install slopo'.
  2. 2Run 'slopo init' to create a configuration file.
  3. 3Set the source directory and embedding model in the config.
  4. 4Run 'slopo index' to parse code, 'slopo embed' to compute embeddings, and 'slopo analyze' to generate a report.

Slopo Key Features

  • Embedding-based similarity detection for non-exact duplicates
  • Supports Python, TypeScript, JavaScript, Java, Kotlin, C#, Go, Rust
  • Configurable similarity and reranking thresholds
  • Incremental re-indexing for updated codebases
  • Ignore file to skip reviewed clusters
  • Clusters ranked by similarity and distance in codebase

Slopo Use Cases

  • Detecting non-exact code duplication in large codebases
  • Identifying harmful duplicates spread across modules
  • Assisting AI agents in refactoring and code cleanup

Slopo Pricing & Free Credits

Slopo currently operates on a Free model.

This tool is completely free to use

Slopo

Free

Open source CLI tool, free to use with your own embedding API key.

Slopo Pros & Cons

Pros

  • Detects non-exact duplicates that other tools miss
  • Supports multiple programming languages
  • Configurable thresholds for fine-tuning results
  • Incremental indexing saves time on repeated runs

Cons

  • Requires an external embedding API (e.g., Voyage AI)
  • Limited to languages with AST parsers
  • May produce false positives for similar but semantically different code

What is Slopo best for?

  • Developers managing large codebases
  • Teams focusing on code refactoring

Slopo FAQ

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