Originality.ai is an AI and plagiarism checker that suits publishers, agencies and editors who scan batches of articles. The catch, as of Oct 2026: the free plan is a one-time 10K words, not monthly, and paid plans are sized in credits where 1 credit is 100 words, so you need a rough monthly word count first.
Anyone looking up an Originality.ai review is usually weighing one thing: will the free words be enough, or will I end up paying? I read Originality.ai's homepage and its pricing page, which states that all prices are in US dollars and that you can cancel your subscription anytime. Everything here comes from those two pages.
Originality.ai plans and word allowances
| Plan | Price (US dollars) | What's included | The limit that bites |
|---|---|---|---|
| Free | 0 dollars, no subscription required | 10K words (100 credits), AI checker, plagiarism checker, grammar, readability and guideline checkers | The 10K words are one time only, not a monthly refill |
| Pro | 12.95 dollars a month billed yearly, or 14.95 dollars a month billed monthly | 200K words (2K credits) a month, 30 day scan history, deep scan, bulk scan, share report, PDF download, file upload, team management | Extra team seats cost more, listed from 8.62 dollars a month |
| Enterprise | 136.58 dollars a month billed yearly, or 179 dollars a month billed monthly | 1.5M words (15K credits) a month, 1 year scan history, API access, priority support | Extra team seats are listed at 19.04 and 24.95 dollars a month |
Plans are as of Oct 2026. On every plan you can buy more credits, and 1 credit equals 100 words. Check the vendor's pricing page before you buy.
Why the free words run out once
The thing to understand about Originality.ai is the credit. Its pricing page says 1 credit equals 100 words, and every plan is sized that way. The Free plan gives you 100 credits, which is 10K words, and it's one time. It doesn't refill at the start of the month. Once you've scanned those words, you're buying credits or picking a plan.
That changes how you'd use the free plan. It's enough to try the checks on a handful of articles and see whether the reports suit how you edit. It isn't a free tool you can lean on every week. If you're a student hoping for ongoing free scanning, this isn't set up for that.
On Pro, you get 200K words a month, which is 2K credits. On Enterprise it's 1.5M words a month, or 15K credits. Both plans let you buy more credits on top. So before you choose, add up roughly how many words you check in a typical month. That number decides the plan more than any feature does.
Yearly versus monthly on Originality.ai
Both paid plans show two figures. Pro is 12.95 dollars a month on yearly billing, which the page says is charged as 155.4 dollars for the year, or 14.95 dollars a month if you pay monthly. The page says you save 24 dollars on the yearly Pro plan. Enterprise is 136.58 dollars a month billed yearly or 179 dollars a month billed monthly, and the page puts the yearly saving at 509 dollars. Remember that a yearly plan means you're paying for twelve months up front.
What the checks cover
Originality.ai's homepage lists an AI checker for detecting AI content in your text, a plagiarism checker and bulk scan for checking several texts at once. The free plan's feature list adds grammar, readability and guideline checkers and a fact and hallucination check. Pro brings deep scan, bulk scan, a shareable report, PDF download, uploads of docx, pdf and doc files, team management and a 30 day scan history. Enterprise stretches that history to 1 year and adds API access and priority support. If you want to compare free options first, I've rounded up free AI content detectors, and there's a separate list of plagiarism checkers worth a look.
Who Originality.ai is for
It fits publishers, agencies and editors who check batches of articles for AI text and plagiarism and can estimate their monthly word count. Pro is pitched at individuals and small teams, and Enterprise at agencies and publishers, which matches the jump from 200K to 1.5M words.
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It's a poor fit if you want a one-off free check of long text, because the free 10K words are used once. It's also a poor fit for a student who needs free scanning week after week.
My advice on Originality.ai
I'd use the free 10K words to run a few real articles through it and see whether the reports fit the way you edit. If you're an editor or agency checking work every week, I'd work out your monthly word count, then pick Pro or Enterprise from that number, not from the feature list. I'd skip it if you only need the odd free check, because the free words don't come back. And I'd read the reports as one input into your decision, not the decision itself, which is the same thing I say in my piece on whether AI writing counts as plagiarism.
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Frequently asked questions
Is Originality.ai free?
There's a Free plan with no subscription required. It gives you 10K words (100 credits) one time, not every month.
How many words is one Originality.ai credit?
Originality.ai's pricing page says 1 credit equals 100 words.
How much is Originality.ai Pro?
Pro is 12.95 dollars a month billed yearly or 14.95 dollars a month billed monthly, for 200K words (2K credits) a month. Prices are in US dollars.
Can I cancel Originality.ai?
Yes. Its pricing page says you may cancel your subscription anytime.
