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Free AI detectors

6 AI detectors tools we review offer a free plan. Filter and sort the table, or open any tool's review.

Scored by the Conversion Gems editorial team · reviewed June 2026 6 tools with a free plan · median paid plan $10/mo
6 tools
DetailsPricingFree planFree trialWhat the plan includesReview
Winston AI8.0 / 10Freemium$10/moYesYesFree trial (2K credits); from $10/mo annualReview Winston AI
Copyleaks7.5 / 10Freemium$8.99/moYesYesFree tier (10 pages/mo); paid from $8.99/moReview Copyleaks
GPTZero7.5 / 10Freemium$8.33/moYesYesFree tier; paid from $8.33/mo (annual)Review GPTZero
ZeroGPT7.2 / 10Freemium~$9.99/moapproximateYesYesFree tier; Pro from ~$9.99/moReview ZeroGPT
Sightengine7.0 / 10Freemium$29/moYes—Free (2K ops/mo); paid from $29/moReview Sightengine
Content at Scale6.5 / 10Freemium$249/moYesYesFree detector; writing from $249/moReview Content at Scale
Winston AI8.0 / 10
Freemium · $10/mo · Free trial

Free trial (2K credits); from $10/mo annual

Copyleaks7.5 / 10
Freemium · $8.99/mo · Free trial

Free tier (10 pages/mo); paid from $8.99/mo

GPTZero7.5 / 10
Freemium · $8.33/mo · Free trial

Free tier; paid from $8.33/mo (annual)

ZeroGPT7.2 / 10
Freemium · ~$9.99/mo · Free trial

Free tier; Pro from ~$9.99/mo

Sightengine7.0 / 10
Freemium · $29/mo

Free (2K ops/mo); paid from $29/mo

Content at Scale6.5 / 10
Freemium · $249/mo · Free trial

Free detector; writing from $249/mo