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GPTZero vs WasItAIGenerated

Two fact sheets from our own research, side by side — pricing, platforms, API access and status re-checked by us rather than quoted from the vendors. GPTZero starts at $8.33, WasItAIGenerated at $5. Both have a free tier. Both ship a public API.

GPTZeroEstimates whether text was machine-written and flags the sentencesWasItAIGeneratedDetects AI-generated text, images, documents, voice, and video, with a confidence score and REST API.

Side by side

FactGPTZeroWasItAIGenerated
CategoryAI Detection & HumanizersAI Detection & Humanizers
Pricing modelFreemiumFreemium
Starts at$8.33 month$5 one_time
Public APIYesYes
PlatformsWeb, API, Chrome ExtWeb, API
CompanyGPTZeroPatrick Gerard
Launched2023—
Last verifiedSep 6, 2026Sep 1, 2026

What our research says

GPTZero

The most institutionally accepted of the detectors, and the sentence-level highlighting is what makes a result defensible in a conversation with a student — but no detector is evidence, and pricing this one required leaving the vendor's own site.

Pros

  • Sentence-level highlighting shows what drove the score instead of a bare percentage
  • Batch uploads and a developer API make it usable inside an existing review workflow
  • Free tier is generous enough to evaluate properly before paying

Cons

  • Prices are rendered client-side and are not readable without a browser, which makes budgeting awkward
  • API access is a paid add-on rather than part of the standard tier
  • Word-metered quotas punish long documents disproportionately
  • Detection accuracy remains contested and the tool cannot prove authorship

WasItAIGenerated

WasItAIGenerated covers more content types than most detectors in this space, text, images, documents, voice, and video, all behind one credit system and a documented API. Credit costs differ a lot by content type, so the effective price per check depends heavily on what you are scanning.

Pros

  • Covers text, image, document, voice, and video detection in one product
  • Documented REST API with per-content-type credit pricing
  • Free tier of 1,000 credits is enough to test the tool before paying

Cons

  • Credit costs vary a lot by content type, so budgeting requires knowing your mix in advance
  • AI-detection scores of any kind carry real false-positive and false-negative risk, not specific to this vendor
  • The unlimited website plan does not include API access; that requires the $299/month tier

Which one fits

Choose GPTZero if you need

  • Schools and universities that need a defensible second opinion, not a verdict
  • Editors screening freelance submissions at volume
  • Teams wanting provenance reporting on documents they commissioned

Choose WasItAIGenerated if you need

  • Teams screening submissions across mixed media, not just text
  • Developers wanting API-based detection instead of a manual web upload

More comparisons

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