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StealthWriter vs Word Spinner

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. StealthWriter starts at $20, Word Spinner at $9. Both have a free tier.

Side by side

FactStealthWriterWord Spinner
CategoryAI Detection & HumanizersAI Detection & Humanizers
Pricing modelFreemiumFreemium
Starts at$20 month$9 month
Public APINoNo
PlatformsWebWeb, Chrome Ext
CompanyAiVantage LLC
Launched2023
Last verifiedSep 6, 2026Sep 6, 2026

What our research says

StealthWriter

Pairing the rewriter with its own detector in one screen is the sensible design choice here — you can see the before and after score instead of pasting into a third tool to find out. The tiering is honest about what you are buying: daily rewrite count and input length, nothing hidden. Everything else about this category applies, though: detector scores are not a guarantee, the rewrite flattens voice and sometimes meaning, and using it on assessed work is a disciplinary matter regardless of what the score says.

Pros

  • Built-in detector scores text before and after the rewrite in the same interface
  • Free tier is a standing 10 rewrites a day, not a one-off trial
  • Every paid tier raises input length to 5,000 words, so tiers differ only by volume
  • Named US operator with published phone and email support hours
  • Changelog actively maintained, indicating ongoing development

Cons

  • Detector evasion degrades as detectors update — today's score is not a durable result
  • Rewriting flattens voice and can quietly alter facts or technical terms
  • $400/month top tier is steep for a single-function tool, and there is no API to justify it
  • Free tier's 1,000-word input cap excludes most real articles

Word Spinner

Pairing the humanizer with a detector in one product is the sensible arrangement — you rewrite, then check, without paying two vendors. The 100-language coverage and the in-place Chrome extension are genuine conveniences. The category itself is the problem: detector scores from the same vendor that sold you the rewrite are not independent evidence, and detection tools change faster than any humanizer keeps up with.

Pros

  • Humanizer and detector in a single subscription
  • Tone controls and a grammar pass alongside the rewrite
  • Around 75 templates for blog, email and social formats
  • Chrome extension rewrites in place
  • About 1,000 free words with no card before committing

Cons

  • The bundled detector is not independent verification of the bundled rewriter
  • Pricing page renders nothing to a crawler, so figures come from third-party listings
  • No API and no bulk workflow
  • No company name or country published anywhere

Which one fits

Choose StealthWriter if you need

  • Editing model-drafted marketing copy so it reads less mechanically
  • Checking a draft's detector score before it goes to a client who screens for AI text
  • Non-native writers polishing model-assisted drafts for tone

Choose Word Spinner if you need

  • Editing machine drafts into copy that reads naturally
  • Multilingual rewriting across 100+ languages
  • Rewriting inside another site via the browser extension

All StealthWriter alternatives →All Word Spinner alternatives →Browse all AI Detection & Humanizers