Undetectable.ai Pricing 2026: Plans, Costs & Best Value
Quick answer: Undetectable.ai sells monthly word buckets for its AI humanizer (+ unlimited detecting on paid plans). Common public tiers: 10k words ~$9.99/mo (~$5/mo yearly), 20k ~$19/mo (~$9.50/mo yearly), 35k ~$31/mo (~$15.75/mo yearly), 50k ~$42.50/mo (~$21.25/mo yearly). Free trial is tiny (~250 words). Business/custom packs exist for non-expiring credits.
Checked against Undetectable.ai’s public pricing page in August 2026. “50% off” yearly is the marketing default — confirm checkout.
Policy note: Use this for editing AI drafts you are allowed to publish. Do not use humanizers to break school, employer, client, or platform rules that ban undisclosed AI or require original authorship.
Related: Originality.ai pricing, Grammarly pricing, Undetectable.ai alternatives, Undetectable.ai review.
Pick a plan in 30 seconds
- Test the rewriter → Free trial (~250 words).
- Light editing (~10k words/mo) → 10k (~$5–$10/mo).
- Regular blog drafts → 20k–35k.
- Heavy volume / agency → 50k or Business (non-expiring credits).
- You only need detection, not rewriting → Originality.ai.
Pricing plans
| Plan | Monthly Price | Key Features |
|---|---|---|
| Free trial | $0 (limited) | ~250 words to sample humanizer/detector |
| 10k words | Humanizer + unlimited AI detecting, API-compatible class features | |
| 20k words | Same feature set, higher word cap | |
| 35k words | Mid-volume creators | |
| 50k words | Highest self-serve bucket on the public grid | |
| Business | Custom | Non-expiring credits, white-label/redistribution options, priority support |
Paid plans market writing-level matching, watermark/future-proof claims, and Human Auto Typer. Vendor advertises a money-back path if humanized output is still flagged (read their Help terms — conditions apply).
Hidden costs
- Words expire monthly on standard plans — unused quota dies.
- Detector arms race — “passes detectors” is not a permanent guarantee as detectors update.
- Quality still needs a human edit — humanized text can be bland or inaccurate.
- Compliance risk — misrepresenting AI-assisted work can get you fired, expelled, or banned.
- Originality.ai is the better buy if your job is catching AI, not rewriting it.
Who should pay
10k–20k — Creators polishing AI outlines they will still fact-check and disclose where required.
35k–50k / Business — Teams with high rewrite volume and clear internal AI policies.
When to skip Undetectable.ai
Skip if:
- Your school/employer forbids AI rewriting or requires disclosure you won’t provide.
- You need plagiarism/AI detection for freelancers — Originality.ai.
- You only need grammar cleanup — Grammarly.
See Undetectable.ai alternatives.
Final Verdict
If you already use AI drafts legitimately, start on the 10k yearly (~$5/mo) tier and scale words to real usage. Prefer Business only for non-expiring credits at agency volume. Never buy this tool as a shortcut around academic or contractual honesty rules.
Pricing checked August 2026. Verify on undetectable.ai/pricing. See our affiliate disclosure.
How Undetectable.ai compares to alternatives
Next: Originality.ai pricing, Grammarly pricing, Undetectable.ai alternatives, Undetectable.ai review.