AI Detector by Buildly vs Copyleaks (2026): Pricing, Features & Which to Choose

Who comes out ahead

Based only on the facts in our directory. The right pick still depends on the job you need done.

Lower starting price
Not comparable
Not comparable: AI Detector by Buildly does not list a price
Free plan
Tie
Both have one
Higher rating
Copyleaks
2.5 against 4.2
Same job?
Yes
Both are Writing tools

Side by side

Compared on	AI Detector by Buildly	Copyleaks
Our rating	2.5	4.2Better
Starts at	Free	$9.99/mo
Free plan	Yes	Yes
Category	Writing	Writing
Plans	Free	From $9.99/mo
Key features	Sentence-level highlighting rather than a single score Calibrated confidence scores Detects partially AI-written passages in mixed text 10,000 characters per scan with no account Browser extension and free API at 1,000 requests a day	Combined plagiarism and AI-content detection in one scan Multi-language support across dozens of languages Image-based AI detection alongside text scanning Credit-based usage model covering roughly 250 words per credit Browser extension and API for embedding checks into other workflows
Pros	Sentence-level output shows where a judgement came from Genuinely free with a generous API allowance and no account needed Specific privacy statement: not stored, not shared, not used for training	Combines plagiarism and AI-detection in one subscription instead of two tools Free tier gives enough monthly pages to test before paying Long operating history since 2015 in the plagiarism-detection space specifically
Cons	AI text detection is not reliable enough for consequential decisions 99.2% accuracy is not a figure any detector has demonstrated in the wild False positives fall hardest on non-native English writers	Credit-based pricing gets confusing to estimate for high-volume users AI-detection accuracy claims face industry-wide skepticism, not unique to Copyleaks Enterprise and education pricing is hidden behind a sales quote
Company	Buildly LLC	Copyleaks, founded 2015

Prices come from each vendor's pricing page, last checked 20260819. Check the vendor before you buy.

FAQ

Questions people ask

Is AI Detector by Buildly better than Copyleaks?

In our reviews AI Detector by Buildly scores 2.5 and Copyleaks scores 4.2. The better pick depends on the job. AI Detector by Buildly: Free AI text detection with sentence-level highlighting, in a category that does not work. Copyleaks: Copyleaks scans text and images for plagiarism and AI-generated content across dozens of languages for schools and businesses.

Which is cheaper, AI Detector by Buildly or Copyleaks?

AI Detector by Buildly: free. Copyleaks: from $9.99/mo.

Do AI Detector by Buildly and Copyleaks have free plans?

Yes, both have a free plan.

More comparisons

AI Detector by Buildly compared with

All AI Detector by Buildly alternatives

Copyleaks compared with

All Copyleaks alternatives