Originality.AI vs Undetectable AI

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.

The short answer

Cheaper paid plan: Undetectable AI — $9.99/mo vs $14.95/mo for Originality.AI
Free plan: Both have one
Public API: Both have one
Best fit: Originality.AI: Content agencies auditing freelance submissions before they pay for them · Undetectable AI: Marketers cleaning up bulk LLM drafts before publishing
Trust score: About even — Originality.AI 89, Undetectable AI 89

From our own records as of each tool's last check. Anything we have not confirmed is left out rather than guessed. How we verify

Originality.AIAI-text and plagiarism detection built for publishers and agencies

Undetectable AIRewrites machine-written drafts to read human, with detection scoring built in

Side by side

Fact	Originality.AI	Undetectable AI
Category	AI Detection & Humanizers	AI Detection & Humanizers
Pricing model	Freemium	Freemium
Starts at	$14.95/mo	$9.99/mo
Public API	Yes	Yes
Trust score	89 / 100	89 / 100
Platforms	Web, Chrome extension, API	Web, API, Chrome extension
Company	Originality.AI	Undetectable Inc.
Launched	2022	2023
Last verified	Oct 15, 2026	Oct 15, 2026

What our research says

Originality.AI

The detector to pick if you are a publisher or agency policing freelance output at volume, because the team history and writing replay matter more than the raw score. A free Basic tier (three AI-only scans a day, 2,000 words each) now lets you test it before paying. Do not use it to accuse a student; no detector is accurate enough to carry that weight.

Pros

Credit model is legible: 100 words per credit, no hidden weighting
API on the higher tier makes batch pipelines possible
Chrome extension works inside Google Docs, where the writing actually happens
Writing replay from revision history is process evidence, not just a score
Free Basic tier allows three AI-only scans a day with file upload, no subscription needed

Cons

Monthly subscription credits expire, so a light month is wasted spend
The jump from $14.95 to $179 a month is a steep single step
False positives on heavily edited or non-native English writing are a documented hazard across every detector
Accuracy benchmarks are largely vendor-run

Undetectable AI

Buy it only if you accept that passing a detector is a moving target: detector vendors retrain constantly, and text that cleared last month can flag next month. As a multi-format detection dashboard it is more defensible than as a bypass tool.

Pros

Detector and rewriter run in one pass, so you see which sentences changed and why
Coverage extends past text into image, voice, video and document classifiers
Browser extension works inside Docs and Gmail rather than a separate tab
Entry tier is genuinely cheap at annual rates

Cons

Rewrites often flatten voice and add filler to break statistical patterns
Detection on short passages is unreliable in both directions
Word quotas drain fast because rejected attempts still consume them
The free trial caps at 250 words, barely enough to judge output quality

Which one fits

Choose Originality.AI if you need

Content agencies auditing freelance submissions before they pay for them
Publishers sweeping large archives for machine-written pages
SEO teams screening acquired, syndicated or outsourced content

Choose Undetectable AI if you need

Marketers cleaning up bulk LLM drafts before publishing
Editors wanting a second opinion on submitted copy
Teams screening images and audio for synthetic origin
Non-native writers smoothing register and tone