Free (No Sign-Up Required): Free AI Checker on the homepage — paste any text to receive a GPTZero-style Human/AI score instantly with no account required. Limited to the detection-only homepage tool; no persistent word allocation or humanization access on the free tier.
Essential ($1.15/day, approx. $34.50/month or ~$24/month billed annually at 30% off): 50 requests per day, 1,000 words per request, 250,000 words per month, 100% plagiarism-free, 100+ languages, iOS App, Chrome Extension. File formats: .doc and .txt only. No priority support. No multi-seat sharing.
Pro ($1.45/day, approx. $43.50/month or ~$30.45/month annually — Most Popular): 100 requests per day, 1,500 words per request, 500,000 words per month, 100% plagiarism-free, 100+ languages, iOS App, Chrome Extension, 3-seat team sharing. File formats: .pdf, .jpeg, .jpg, .png, .webp.
Business ($3.55/day, approx. $106.50/month or ~$74.55/month annually): 500 requests per day, 2,000 words per request, 1,000,000 words per month, 100% plagiarism-free, 100+ languages, iOS App, Chrome Extension, Priority support, 5-seat team sharing. Full file format support.
Enterprise ($18.55/day, approx. $556.50/month or ~$389.55/month annually): Unlimited requests per day, 3,000 words per request, 5,000,000 words per month, 100% plagiarism-free, 100+ languages, iOS App, Chrome Extension, Priority support, 10-seat team sharing. Full file format support.
Note: Annual billing discounts of up to 30% available — verify current pricing and annual plan totals at stealthgpt.ai/pricing.