AI Humanizer Desk
LatestBest AI humanizer 2026What is an AI humanizer?Detector landscape

Comparison · Free vs Paid

EssayFilter vs Undetectable AI — Free vs Paid Value

A focused look at whether it's worth upgrading from the free tier on either tool, comparing EssayFilter and Undetectable AI on free plan usefulness and related dimensions.

By Humanizer Desk Editorial6 min read

EssayFilter and Undetectable AI are both AI text humanizers, but this comparison zooms in on whether it's worth upgrading from the free tier on either tool. On our weighted editorial model, EssayFilter scores 8.10/10 overall and Undetectable AI scores 7.00/10 — with EssayFilter ahead once every dimension is weighted together. Zoomed in on free plan usefulness alone, EssayFilter rates noticeably higher (8.4 vs 6.2 out of 10). Scores reflect public site evidence gathered as of 2026-07-26, not a lab-tested detector benchmark.

Try EssayFilterTry Undetectable AI

Free plan usefulness: EssayFilter vs Undetectable AI

Here's what each vendor's own site says relevant to whether it's worth upgrading from the free tier on either tool:

DimensionEssayFilterUndetectable AI
Free plan usefulness8.46.2
Pricing value8.06.9
Overall weighted score8.107.00

EssayFilter

Free / starter access plan: Free tier marketed

Undetectable AI

Confirm plans on undetectable.ai.

EssayFilter vs Undetectable AI — Free vs Paid FAQ

For free vs paid specifically, EssayFilter has the edge on free plan usefulness, though Undetectable AI may still suit you better depending on price and workflow fit.

The clearest gap is on free plan usefulness: EssayFilter leads by roughly 2.2 points on our 0–10 scale. Everything else — free plan, pricing, and support — is covered on each brand's full review.

EssayFilter scores higher on pricing value in our model (compare exact plan prices on each official site, since promotions change). Weigh that against free plan usefulness, where EssayFilter currently rates higher.

Check each vendor's own site directly: https://www.essayfilter.com/ for EssayFilter, and https://undetectable.ai/ for Undetectable AI. Pricing, free limits, and features can change after our last research pass.

Want the full picture instead of just free vs paid? See the complete EssayFilter vs Undetectable AI comparison, or the standalone reviews for EssayFilter and Undetectable AI.

Compare this pair from other angles