AI answer engine with real-time web search and cited sources.
Originality.ai vs Undetectable AI
Features, pricing, strengths and trade-offs — and which one fits your situation.
The verdict
Editor’s verdict
Originality.ai is primarily a checking tool for publishers and editors, while Undetectable AI is primarily a rewriting tool designed to lower AI-detection scores. Choose Originality.ai if you review content from writers or contributors and need AI detection, plagiarism checking, fact checking and Google Docs writing replay in one workflow, with an API for bulk scans. Choose Undetectable AI if you are a writer or marketer using AI in a context where that is permitted and want to check how text may be scored across several detectors and edit it to read more naturally. Neither tool's detection score is proof on its own: all AI detectors produce false positives, so results should prompt a conversation, not an accusation. Students should be aware that using a humanizer to disguise AI-generated work typically breaks academic integrity policies, and that the safest approach is to follow your institution's AI rules and disclose AI assistance. For legitimate study help, a research tool like Consensus or Elicit is the better choice.
Originality.ai has a free plan, while Undetectable AI offers a free trial.
Which should you choose?
Choose Originality.ai if…
- You need publishers and content teams checking text for AI generation and plagiarism
- You're one of: content publishers and editors, seo and content agencies, website owners hiring freelance writers
- You want a free plan (Undetectable AI only has a trial)
- Combines AI detection, plagiarism and fact checking in one tool
Choose Undetectable AI if…
- You need checking text against multiple AI detectors and rewriting flagged passages
- You're one of: content marketers polishing ai-assisted drafts, writers checking how their text may be scored by detectors, agencies needing an api
- Detect, rewrite and re-check workflow in one place
At a glance
| Originality.ai | Undetectable AI | |
|---|---|---|
| Best for | Publishers and content teams checking text for AI generation and plagiarism | Checking text against multiple AI detectors and rewriting flagged passages |
| Free plan | Yes | Trial only |
| Starting price | From $12.95/mo | From $5/mo |
| Learning curve | Low | Low |
| Platforms | Web, Chrome extension, API | Web, Chrome extension, API |
| Ideal for | Content publishers and editors, SEO and content agencies, Website owners hiring freelance writers | Content marketers polishing AI-assisted drafts, Writers checking how their text may be scored by detectors, Agencies needing an API |
Feature comparison
| Originality.ai | Undetectable AI | |
|---|---|---|
| Answers with citations | Limited | No |
| Searches academic papers | No | No |
| Upload & chat with PDFs | No | — |
| AI content detection | Yes | Yes |
| Rewrites / humanizes text | Yes | Yes |
| Citation formatting | Limited | — |
| Browser extension | Yes | Yes |
| Writing editor | No | — |
IncludedLimited / higher plansNot available— Not confirmed
Security & enterprise
| Originality.ai | Undetectable AI | |
|---|---|---|
| Business / enterprise plan | Yes | Yes |
| SSO (SAML / OIDC) | — | — |
| SCIM user provisioning | — | — |
| SOC 2 | — | — |
| ISO 27001 | — | — |
| HIPAA (BAA available) | — | — |
| GDPR DPA | — | — |
| Data residency options | — | — |
| No training on your data | — | — |
| Audit logs | — | — |
| Admin controls | Yes | — |
| Deployment | Cloud | Cloud |
From each vendor's security documentation. "—" = not confirmed. What to ask vendors · Compare all tools
What each tool does
Originality.ai
Originality.ai is a content-checking tool that combines an AI detector, plagiarism checker, fact checker and readability scoring. It is used by publishers, SEO agencies and editors to review submitted content, with a Chrome extension that can replay how a Google Doc was written. An API supports bulk and automated scanning.
Key features- AI content detector with several detection models
- Plagiarism checker
- Fact checker that returns supporting sources
- Chrome extension with Google Docs writing replay
- Readability and grammar scoring
- API and bulk website scanning
Undetectable AI
Undetectable AI combines an AI detector that aggregates predictions from several third-party detectors with a humanizer that rewrites AI-generated text. It also offers a Chrome extension, an API and a set of writing tools. It is used by content writers and marketers, and is also marketed to students, where undisclosed AI use may breach academic rules.
Key features- AI detector showing likely results across several popular detectors
- Humanizer with modes such as Quality, Balanced and Creative
- Chrome extension that works in Gmail, Google Docs, LinkedIn and other sites
- Auto-typer tool for Google Docs
- API and Zapier integration
- Additional writing tools such as paraphraser and AI writer
Pricing
Originality.ai
Free basic tier (3 scans/day); paid from $12.95/mo annual ($14.95 monthly) Pro
Undetectable AI
Free trial (250 words); paid from $5/mo billed annually (10k words/mo)
Prices last checked September 2026. Plans change often — confirm on each vendor's site.
Pros and cons
Originality.ai
Strengths- Combines AI detection, plagiarism and fact checking in one tool
- Writing replay gives evidence beyond a single detection score
- Team management and scan history for editorial workflows
- API suits agencies scanning content at volume
- Like all AI detectors, it produces false positives, so results should not be the sole basis for accusations
- Credit-based scanning adds up for high volumes
- Aimed at publishers rather than students; no research or paper-search features
- Free tier is limited to a few scans per day
Not ideal for: Students looking for research help or anyone wanting a single detection score as definitive proof of misconduct should look elsewhere.
Undetectable AI
Strengths- Detect, rewrite and re-check workflow in one place
- Detector gives a view across multiple third-party checkers
- Extension works inside many common writing sites
- API available for businesses
- Free option is only a small trial
- Humanized output can read awkwardly and needs manual editing
- Auto-typer and humanizer features can be used to disguise AI work, which may breach academic integrity policies
- Detector results are estimates and can produce false positives
Not ideal for: Students should not use it to pass off AI-generated work as their own; it offers no research, source-finding or citation features.
Integrations
Originality.ai
Undetectable AI
FAQ
What is the main difference between Originality.ai and Undetectable AI?
Originality.ai is built for publishers and content teams checking text for AI generation and plagiarism; Undetectable AI is built for checking text against multiple AI detectors and rewriting flagged passages.
Is Originality.ai or Undetectable AI cheaper?
Originality.ai starts from $12.95/mo and Undetectable AI starts from $5/mo (as of September 2026). On entry price, Undetectable AI is cheaper — but compare what each plan includes, since limits differ. Always confirm current pricing on each vendor's site.
Do Originality.ai and Undetectable AI have free plans?
Originality.ai has a free plan, while Undetectable AI offers a free trial.
Which is easier to use, Originality.ai or Undetectable AI?
Both have a low learning curve.
What are good alternatives to Originality.ai and Undetectable AI?
Other research & study tools worth comparing include Perplexity, Consensus and Monica.
