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PromptBrake vs GPTZero

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

PromptBrake compared with GPTZero
DetailPromptBrake logo PromptBrakeGPTZero logo GPTZero
What it doesAutomated AI security testing for chatbots, agents, and APIs AI detector that identifies content generated by large language models
StageNot given Not given
FoundedNot given 2023
Based inNot given Not given
Pricing modelFreemium Freemium
PricingFree trial: 3 scans over 7 days. $99 USD once for 5 scans valid 30 days (no renewal). $499/month for 30 scans per billing month and one active runner license (month-to-month). Free tier for basic AI detection up to 10,000 characters. Professional plan available with pricing details on subscription page. API pricing available for developers.
Key features
  • 138 automated checks across 18 attack categories
  • API endpoint and web chatbot testing
  • Self-hosted Docker runner
  • Evidence exports and Baseline Diff
  • CI/CD release gate automation
  • Findings with evidence, business impact, and remediation guidance
  • Behavioral regression detection
  • AI detection with 99.9% accuracy
  • Sentence-by-sentence highlighting of AI-generated text
  • Writing Replay showing video proof of writing process
  • Plagiarism detection
  • Grammar checking and writing feedback
  • Chrome extension for browser-based scanning
  • Integration with Canvas and Google Classroom
  • API for developer integration
  • Detects multiple AI models including GPT-5, GPT-6, Gemini, and Claude
  • AI Tutor for writing improvement
What makes it different
  • Built by an application-security practitioner with GWEB certification
  • Compare test results with Baseline Diff to verify fixes
  • 99.9% accuracy rate verified by independent benchmarks from Penn State's AI Research Lab
  • De-biased for ESL learners with only 1% false positive rate for non-native English writing
  • Only detector with Writing Replay showing video proof of authentic writing process
  • Trusted by over 10 million users and 100+ organizations globally
Community votes00
DR (Domain Rating by Ahrefs)31 no change since last check81 no change since last check
Trust Flow (Majestic)1227
Citation Flow (Majestic)2943
Referring domains (Majestic)468387

5 details filled in for both companies.

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