Unfox AI

Unfox AI provides probability-based AI writing detection, text humanization, batch review, and APIs for content workflows. Its detector offers overall and sentence-level signals, supports content associated with major AI models, and lists 17 supported languages on the public product page. Its humanizer reconstructs text using sentence context and offers tone-oriented rewriting; the API combines detection and humanization credits, and publishes production limits and non-expiring credit rules. Humanization and API plans are paid; current public annual billing figures conflict with displayed monthly equivalents. Confirm the selected currency, term and final total before subscribing.

✨ Key Features

• AI content detection — Estimate whether submitted text contains patterns associated with AI writing.
• Sentence-level analysis — Highlight sections that may deserve closer human review.
• Multi-model detection — Review text associated with ChatGPT, Claude, Gemini, DeepSeek, and other models.
• Multilingual detection — The public detector page lists 17 supported languages.
• Batch detection — Check multiple documents in one workflow.
• AI text humanizer — Rewrite AI-assisted drafts while preserving the intended message.
• Context-aware rewriting — Reconstruct sentences using lexical, syntactic, semantic, and stylistic context.
• Tone and style review — Inspect and refine wording for a desired voice.
• Humanization API — Integrate detection and rewriting into products or internal pipelines.
• Language scope — Public detector and humanizer pages list 17 supported languages; API language coverage should be checked separately.
• Streaming and production limits — API materials describe NDJSON streaming, rate limits, and GPU-backed infrastructure.
• Privacy-oriented review — The detector page states that submitted content is discarded after analysis.

💳 Pricing

• Humanizer — Paid Basic, Pro and Unlimited plans. The annual view displays $5/$10/$15 monthly equivalents but also $720/$1,440/$2,160 annual totals, which do not equal twelve times those figures. Treat the payable amount as unresolved until the final currency, term and total are confirmed.
• Displayed quotas — Basic 240,000 words/year, Pro 960,000/year, Unlimited no annual word cap; displayed batch limit 5,000 words. These do not resolve the billing discrepancy.
• Detector — Public no-sign-up checking is available with current product limits.
• API — Detection and humanization share non-expiring credits. The official API FAQ lists overage at the plan's per-word rate; custom enterprise rates are available.
• Review — Detection scores are signals, not proof of authorship. Review rewrites for facts and follow applicable academic, workplace and publishing policies.

⚖️ Alternatives Compared

🎯 Use Cases

• Editorial review: Flag passages that need human fact and authorship review.
• Student writing checks: Use detection as one contextual signal, not a final academic judgment.
• SEO content QA: Review outsourced or AI-assisted drafts before publication.
• Human editing support: Improve flow and vary repetitive AI-style phrasing.
• Multilingual review: Check or humanize content in supported languages.
• Batch publishing workflows: Process multiple documents before CMS publication.
• Writing-product integration: Add detection or rewriting to another application through the API.
• Agency operations: Review client content across recurring projects and teams.