Zero GPT

Simple, Transparent Pricing

Start with free scans. Paid plans remove the free scan limit on AI detection and add plagiarism and grammar word allowances.

Free

3 free scans in total, shared across all five tools (not per day or per month). No signup needed to start.

Start scanning
MonthlyAnnuallySave up to 30% annually

Loupe

Close-inspection scanning for individual writers and students.

$13.99/mo

  • 100,000 characters per AI detection scan
  • 750 plagiarism-check words (one-time)
Choose Loupe
Most popular

Caliper

Precision measurement for regular editors and content teams.

$22.99/mo

  • 100,000 characters per AI detection scan
  • 35,000 plagiarism-check words / month
Choose Caliper

Spectrometer

Full forensic instrumentation for power users and small teams.

$29.99/mo

  • 150,000 characters per AI detection scan
  • 60,000 plagiarism-check words / month
Choose Spectrometer
FeatureLoupeCaliperSpectrometer
Characters per AI detection scan100,000100,000150,000
Plagiarism Checker words750 (one-time only)35,000 / month60,000 / month
Grammar & Spell Check words1,0001,00010,000