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Different category, not a better humanizer

Rewritelyapp vs Undetectable.ai
Built for different jobs.

Undetectable.ai is the most-searched humanizer on the market. We get asked how we compare. The honest answer is that we built a different category of tool, not a better humanizer. Here’s the comparison so you can decide which actually fits what you’re trying to submit.

R

Rewritelyapp

verified

Submit-ready academic writing, built around proof and transparency.

Different

category of tool

$15/mo

Cheapest plan

U

Undetectable.ai

General-purpose AI humanizer, broad audience, marketing-led.

Humanizer

category

$19/mo

Cheapest plan

Pass rate from our 200-essay test corpus, week of May 19, 2026. Methodology →

Feature-by-feature

Where each tool actually differs.

Feature Rewritelyapp Undetectable.ai
Avg detector pass-rate (5 detectors) 95.8% 87.4%
Weekly published pass-rate audit Yes, live table, downloadable corpus No public methodology
Annotated edits with reasons Every edit + citation Black-box rewrite
Citation-aware (in development) (research papers) Citation-aware (in development) preservation No special handling
Journal style guide selector 14 journal families None
Reviewer-rubric scoring (personal statements) reviewer-aware polish None
Voice preservation (compared to your other docs) Yes, per-user fingerprint Generic ‘readability’ mode
Pay-once option $19 / statement, $29 / paper Subscription only
Free tier 1,200 words / month, no card 250 words trial, card required
Academic-integrity stance (published) Explicit, mapped to ICMJE / COPE / Common App No public stance
Documents used for training? Never, deleted after 30 days Opt-out, on by default
API Yes, included on Lab plan Yes, separate pricing
Honest verdict

Who each tool is actually best for.

R

Pick Rewritelyapp if…

  • You’re polishing a personal statement, application essay, or research paper
  • You want to see what changed and why
  • You need citation-aware handling
  • You’d rather pay $19 once than $19 / month
  • You need to disclose AI tool use, and want a tool that makes that easy
U

Pick Undetectable.ai if…

  • You’re humanizing high volumes of generic content (blog posts, marketing copy)
  • You don’t need to see what changed
  • You’re not submitting to a journal or admissions committee
  • You’ve already built workflows around their API

Try the difference on one paragraph.

Paste a paragraph you’ve already run through Undetectable. See what Rewritelyapp does differently, before paying for anything.

Try free, no card →