Originality.ai

Originality.ai checks text for AI writing and plagiarism. It is an AI content detector and plagiarism checker that also includes a grammar checker, a humanizer and an API, so publishers and writers can review copy before it goes live.

Credits are the unit of billing, and one credit covers 100 words.

Pay as you go costs a one-time $30 for 3,000 credits, and unused credits expire two years after purchase.

The Pro plan is $12.95 a month billed annually or $14.95 monthly, and gives you 2,000 credits each month.

The Enterprise plan is built for agencies and publishers, costs $136.58 a month billed annually or $179 monthly, and includes 15,000 credits monthly.

Subscription credits expire at the end of each month, so Originality.ai suits steady, predictable checking more than occasional use.

Extra credits can be topped up under Settings in your account.