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Choose Your Plan

AI-guided research methodology, study design, and sample size calculation. 95% cheaper than legacy statistical software.

MonthlyAnnual (Save 20%)

Free

$0

Explore the basics

  • 5 queries per month
  • Basic study design guidance
  • Simple & Advanced modes
Most Popular

Researcher

$15/mo

For individual researchers

  • 50 queries per month
  • Full methodology + sample size
  • File upload (PDF, DOCX, images)
  • Session history
  • Protocol export (DOCX & PDF)

Pro

$29/mo

For active researchers

  • Unlimited queries
  • Everything in Researcher
  • Priority AI models
  • Advanced statistical scenarios
  • Citation generation

Institutional

$49-99

Per user/month for teams

  • Unlimited queries
  • Everything in Pro
  • Admin dashboard
  • Usage analytics
  • SSO & invoice billing
  • Priority support

Compare: nQuery costs $925-$7,495/year with no AI guidance. ProtoCol provides AI-guided methodology for a fraction of the cost.