Acadly AI vs Scribbr: Subscription vs Pay-Per-Document for Plagiarism and Integrity Checks

Scribbr is one of the most trafficked names in student-facing academic integrity. The Plagiarism Checker, Citation Generator, and now the bundled AI Detector have made Scribbr a default recommendation on countless university library pages. As of April 2026, Scribbr's pricing model is transactional — pay per document, no subscription — which creates a specific economic comparison with a subscription bundle like Acadly AI. Here is the honest breakdown.

Scribbr pricing

Scribbr does not offer a monthly subscription for the Plagiarism Checker. Prices are per-document, starting at $19.95 for documents up to 7,500 words and rising to $39.95 for larger papers. Premium Plagiarism checks bundle the AI Detector and AI Proofreader as free add-ons. The Citation Generator is free forever and supports 1,000+ styles. Scribbr also operates a paid human-editing service ($0.02+ per word), which is useful for thesis-stage polish but is a separate transaction from the plagiarism flow.

Acadly AI pricing

Acadly AI Pro is $17.99/mo monthly or $11.92/mo on annual (save 70%). The subscription includes 30 plagiarism scans per month, 50 AI Detector scans, 50 Humanizer runs, 100 Grammar runs, 100 Paraphrase runs, 50 papers in the Research Writer, 30 slide decks, and 25 PDF chats. Premium ($27.99/mo) lifts every cap. Free includes 3 plagiarism scans, 5 detector runs, 5 humanizer runs, and 10 grammar + paraphrase runs per month, which is enough to check a single coursework submission end to end at zero cost.

Scribbr vs Acadly AI at a glance

The per-scan math

One Scribbr plagiarism scan at $19.95 costs $1.96 more than a full month of Acadly AI Pro, and Acadly includes 30 plagiarism scans in that month plus seven additional tools. If you check plagiarism exactly once per year — one final thesis scan and nothing else — Scribbr is the cheaper path. If you check more than once a year, or want the AI Detector and Humanizer alongside the plagiarism tool, Acadly's monthly subscription crosses break-even instantly.

The detect-and-rewrite workflow

Scribbr's AI Detector is bundled free with a premium plagiarism scan, which is generous. What Scribbr does not offer is a Humanizer or a Paraphrase tool, so when the detector flags a span, you are handed a report and asked to rewrite elsewhere. Acadly AI closes that loop inside one dashboard: Detector flags a span, Humanizer rewrites it with a chosen tone, Detector re-runs, report shows the delta. The friction between 'detect' and 'fix' is where most students give up on integrity workflows, and the bundled model is the cleaner answer to that friction.

When Scribbr is still the right pick

If you run plagiarism scans transactionally — once per major submission and never between — and your habit is already Scribbr, the per-document model is legitimate and does not require a subscription commitment. Scribbr's plagiarism database is well-established and its human-editing service for thesis polish is a real service that has no direct equivalent in Acadly. If you need a human proofreader, Scribbr covers that; Acadly does not.

When Acadly AI wins

If you check integrity more than once a semester, or if you want the Detector and Humanizer to feed each other during drafting (not just at final-submission time), Acadly's subscription bundle is both cheaper per use and more workflow-integrated. [See pricing](/pricing), [browse features](/features), or [start on Free](/signup) and run one plagiarism + detector + humanizer loop on a draft you are working on to see the integrated flow.

How Acadly AI compares