iThenticate

Name: iThenticate
Price: 125 USD

Paid APIWeb

What iThenticate is

iThenticate screens important documents for originality and possible misconduct before publication. Its Similarity Report compares a submission with billions of web pages, previously submitted works, periodicals, journals, and other publications, then highlights matching text. The similarity score shows the percentage matching other sources and is intended to support a review of whether each match is acceptable. Reports include match overview, all sources, match breakdown, and side-by-side comparison views. Crossref Similarity Check is supported, and searches can include Crossref content. Individual credits target researchers, scholars, and graduate students preparing manuscripts, theses, or dissertations. The service runs on the web and offers PDF report export, LMS integration, and an API for organizational accounts. API requests use XML-RPC over SSL and are limited to 60 requests per second per account. Pricing starts at $125, paid once, with no free plan.

Who it suits

Researchers, scholars, graduate students, and organizations reviewing documents before publication or submission. It suits teams needing web, academic, and Crossref source matching.

What it does well

Compares submissions with billions of listed sources
Provides multiple Similarity Report views
Supports Crossref Similarity Check
Offers PDF export and LMS integration
Includes organizational API access

What to know first

No free plan
Individual packages lack AI writing detection
API requires an organizational account
Uploads have file, page, and word limits

Limits

Uploads are capped at 200 MB total, 100 MB per file, and 800 pages per paper, with at least 20 words per file. Individual credits remain valid for 12 months, include five free revisions, and do not provide AI writing detection.

Plans

Plan	Billed and limits	Price
Single	$125 (Exclusive of taxes) · 1 manuscript up to 25,000 words · Credits valid for 12 months · 5 free revisions · AI writing detection not available	$125, paid once
Multiple	$300 (Exclusive of taxes) · Up to 3 manuscripts or one up to 75,000 words · Credits valid for 12 months · 5 free revisions · AI writing detection not available	$300, paid once
Organization	On request · Customized pricing based on organization size and plagiarism checking and reputation management needs	On request

As ithenticate.com lists them, read 8 Oct 2026. The maker's own page has the final word.

Getting started

Open the iThenticate website
Choose the Single or Multiple individual credit package
Create or access a web account
Upload a file meeting the word, page, file-size, and total-size limits
Review the Similarity Report and export it as PDF
Contact an iThenticate account sales representative for organizational API access

Verdict

iThenticate focuses on source matching and structured similarity review for manuscripts and other high-stakes documents. Check its paid plans, upload limits, and organizational API requirement against your review process.

Questions

How much do individual iThenticate packages cost?

Single costs 125.00 USD one time, excluding taxes, for one manuscript up to 25,000 words. Multiple costs 300.00 USD one time, excluding taxes, for up to three manuscripts or one up to 75,000 words.

Is there a free plan?

No. iThenticate is offered on a paid basis.

Which platforms and browsers are supported?

It runs on the web and lists Windows 8.1, 10, 11, Mac OS X El Capitan 10.11, and ChromeOS. Current and previous Chrome, Firefox, Safari, and Microsoft Edge versions are supported.

Does it detect AI writing in individual plans?

No. The Single and Multiple individual credit packages state that AI writing detection is unavailable.

Can organizations use the API?

Yes, but API access is available only for organizational accounts and requires contacting an iThenticate account sales representative. Requests use XML-RPC over SSL and are throttled to 60 requests per second per account.

What report and integration options are available?

Reports can be exported as PDF, and the service supports LMS integration and Crossref Similarity Check.

Facts from iThenticate's own pages

AI detection and individual plans: The Single and Multiple individual credit packages state that AI writing detection is not available. · ithenticate.com, 8 Oct 2026
API: API access is available only for organizational accounts and requires contacting an iThenticate account sales representative. · guides.ithenticate.com, 8 Oct 2026
API constraints: API requests use XML-RPC over SSL and are throttled to 60 requests per second per account. · guides.ithenticate.com, 8 Oct 2026
Headquarters: Oakland, California · ithenticate.com, 28 Sept 2026
Integrations: iThenticate supports Crossref Similarity Check and its search targets can include Crossref content. · guides.ithenticate.com, 8 Oct 2026
Intended users: Individual credits are intended for researchers, scholars, and graduate students preparing manuscripts, theses, or dissertations for publication and submission. · ithenticate.com, 8 Oct 2026
Purpose: iThenticate screens high-stakes documents for originality and potential misconduct before publication. · ithenticate.com, 8 Oct 2026
Report interpretation: The similarity score indicates the percentage of text matching other sources and should be used as part of a review process to determine whether a match is acceptable. · guides.ithenticate.com, 8 Oct 2026
Report tools: The Similarity Report offers match overview, all sources, match breakdown, and side-by-side comparison modes. · guides.ithenticate.com, 8 Oct 2026
Security: The service added multi-factor authentication by one-time passcode for iThenticate administrator sign-ins in September 2026. · guides.ithenticate.com, 8 Oct 2026
Similarity checking: The Similarity Report highlights matching text and compares submissions against billions of web pages, previously submitted works, and periodicals, journals, and publications. · guides.ithenticate.com, 8 Oct 2026
Support: iThenticate says its support team is available 24/7 and provides support by email at [email protected]. · ithenticate.com, 8 Oct 2026
Supported systems: The listed desktop operating systems are Windows 8.1, 10, and 11, Mac OS X El Capitan 10.11, and ChromeOS; supported browsers are current and previous versions of Chrome, Firefox, Safari, and Microsoft Edge. · guides.ithenticate.com, 8 Oct 2026
Upload limits: Uploads are limited to 200 MB total, 100 MB per file, 800 pages per paper, and at least 20 words per file. · guides.ithenticate.com, 8 Oct 2026