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ZeroGPT vs Curbi

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

ZeroGPT compared with Curbi
DetailZeroGPT logo ZeroGPTCurbi logo Curbi
What it doesAI content detector and writing toolkit for identifying AI-generated text and improving writing quality Check AI agent replies against configured rules and verify signed records
StageNot given Not given
FoundedNot given Not given
Based inUS Not given
Pricing modelFreemium Freemium
PricingFree plan available with no credit card required. Personal and Business/EDU plans with monthly or annual billing options. Annual plans offer 40% discount. Enterprise plans available with custom solutions. API available on pay-as-you-go basis. Free: local open-source checker, browser policy checks, six read-only MCP tools, regression export and offline verification. Managed Check API: $1 per 1,000 checked replies, USD, monthly usage billing through Stripe.
Key features
  • PDF report generation
  • Plagiarism detection across billions of sources
  • Check agent replies against configured pricing, forbidden phrases, and action records
  • Policy Check tool with browser interface for testing rules
  • Model Context Protocol endpoint for Claude, ChatGPT and other MCP clients
  • Offline verification with signed records and Merkle proofs
  • Repair Lab for reproducing and fixing integration failures
  • Managed Check API with pricing transparency
  • MIT-licensed open-source local checker
  • Framework connectors for LangChain and Vercel AI SDK
  • MCP Chaos proxy for testing agent behavior
What makes it different
  • Detects AI from 35+ LLM families including GPT-6, Gemini, and Claude
  • Supports all languages with consistent accuracy
  • User data never used for AI model training
  • Verifiable AI agent compliance without authorization or permission granting
  • Evidence and records portable across platforms and models
  • Transparent per-reply pricing with clear usage examples
  • Open-source core with portable verification
Community votes00
DR (Domain Rating by Ahrefs)79 −1 (down) since last checkNot checked yet no change since last check
Trust Flow (Majestic)330
Citation Flow (Majestic)400
Referring domains (Majestic)62890

5 details filled in for both companies.

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