What is the best free plagiarism checker?

It's important to understand that no plagiarism checker is truly free. Running a plagiarism scan requires significant resources, including access to search engines, academic databases, and cloud-based servers. Each of these services has a cost, so a company offering "free" scans usually needs to recover those costs in other ways.

In many cases, free plagiarism checkers make money by publishing the documents users upload. This means your essay or dissertation could be reused or posted online later, often without your knowledge, to generate advertising revenue.

Some free tools also produce incomplete or low-quality results, because they can't afford access to high-quality APIs or licensed data sources such as Bing or Google.

For these reasons, it's best to be cautious of any tool offering free scanning. If originality and privacy matter, always use a reputable paid plagiarism checker that guarantees your work will remain private and never be published or shared. Our pricing starts at just 12p per 250 words for both AI and plagiarism detection, making it one of the most affordable high-quality scans on the market.