Copyleaks AI Detector vs Detecto

Copyleaks AI Detector identifies AI-written text, including writing that mixes AI and human passages. It supports more than 30 languages and names GPT-5, GPT-4, ChatGPT, Claude, Gemini, DeepSeek, Llama, Bloom, Rytr, and Jasper among the sources it detects. AI Logic explains flagged results, displays AI phrase frequency, and can identify text appearing in published content elsewhere. The web detector scans up to 25,000 characters without login; the website platform requires at least 255 characters and accepts up to 2,000 pages. A Chrome and Edge extension accepts 350 to 25,000 characters, and a Google Docs add-on and education LMS integrations connect it to other workflows. Personal costs $13.99 a year with annual billing or $16.99 a month; Pro costs $74.99 a year with annual billing or $99.99 a month. A free plan and free trial are listed. Copyleaks says data is encrypted at rest with AES-256, reports SOC 2 and SOC 3 certifications, and supports GDPR compliance.

Detecto is a web service that estimates AI-generation likelihood for text, images, video, and audio, returning calibrated probabilities, supporting evidence, and reviewer reports. Text reports can highlight sentences and show perplexity, burstiness, and a confidence band. Image reports include generation likelihood, a region heatmap, surface-artifact flags, and metadata-integrity checks. Reviewers can add notes, save reports, export PDFs, and share controlled links. Scans and reports are private to the account by default; ephemeral mode allows scanning without storing content or reports. Detecto says submissions are never used to train its detection models. The service is aimed at editors, educators, newsroom verification desks, PR teams, agencies, publishers, and universities. A free tier includes starter credits and full report fidelity without a card. Student costs $6.99 a month billed $83.88/yr; Pro costs $19.99 a month billed $239.88/yr; Max costs $59.90 a month billed $718.80/yr. Scores are probabilistic, not proof, and short or translated text can affect detection.