Now supporting Claude, GPT-4, and Gemini

Catch AI Coding Mistakes Before They Ship

Get a second opinion from GPT-4, Claude, or Gemini on every code change. Risk analysis, alternative approaches, and continuous monitoring for AI-assisted development.

$npm install -g 2ndopinion
~/my-project
$ 2ndopinion
Analyzing staged changes...
🔎Analysis CompleteREVIEW
Added user authentication middleware with JWT validation
HIGH — JWT secret is hardcoded on line 12
MEDIUM — No token expiration check
LOW — Consider extracting auth to middleware
Alternative: Use environment variable for JWT secret, add exp claim validation, and move auth logic to a reusable middleware function.
Usage: 2/5 requests this month (free tier)

How It Works

Three steps to safer AI-assisted development

1

Code with any AI assistant

Use Claude Code, GitHub Copilot, Cursor, or any AI tool to write your code.

2

Run 2ndopinion

One command analyzes your git diff. Or use watch mode for continuous monitoring.

3

Get risk analysis + alternatives

See security risks, performance issues, and better approaches before you commit.

Features

Everything you need to validate AI-generated code

Multi-LLM

Compare perspectives from Claude, GPT-4, and Gemini. Use a different LLM than the one that wrote your code for a truly independent review.

Watch Mode

Run 2ndopinion watch in a second terminal. Get automatic analysis every time your files change.

Risk Detection

Catches security vulnerabilities, performance issues, missing error handling, race conditions, and logic bugs that AI assistants often introduce.

Git-Native

Works with staged and unstaged changes. Language-agnostic — analyzes any code that git can diff. No config files needed.

Pricing

Start free. Upgrade when you need more.

Free

$0/month

Try it out on personal projects

  • 5 analyses per month
  • All 3 LLMs
  • Manual + watch mode
2ndopinion signup
Popular

Pro

$10/month

For active AI-assisted development

  • 100 analyses per month
  • All 3 LLMs
  • Manual + watch mode
2ndopinion upgrade

Unlimited

$25/month

For teams and power users

  • Unlimited analyses
  • All 3 LLMs
  • Manual + watch mode
2ndopinion upgrade