# AI tools for “Topic detection” 886 matching tools; showing 24, ranked by relevance. Related categories: [ai-detector](https://openaitools.app/category/ai-detector.md) | # | Tool Name | Monthly Visits | MoM Growth Rate | Pricing Model | Summary | Why it matched | Profile (Markdown) | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | 1 | [ZeroGPT](https://openaitools.app/tool/zerogpt) | 32,864,541 | +19.7% | Freemium, Paid | AI content detection and a full writing toolkit in one place | category: ai-detector; semantic match | [.md](https://openaitools.app/tool/zerogpt.md) | | 2 | [GPTZero](https://openaitools.app/tool/gptzero-me) | 23,246,989 | +32.5% | Freemium, Paid | AI detection and writing verification built for schools and editors | category: ai-detector; semantic match | [.md](https://openaitools.app/tool/gptzero-me.md) | | 3 | [Undetectable AI](https://openaitools.app/tool/undetectable-ai) | 3,113,403 | +17.5% | Freemium | Detect, humanize and verify AI content in one place | category: ai-detector; semantic match | [.md](https://openaitools.app/tool/undetectable-ai.md) | | 4 | [Surfer](https://openaitools.app/tool/surferseo-com) | 249,599 | -29.3% | Paid, Contact for Pricing | AI visibility platform to get your brand cited in AI search | category: ai-detector; keywords 100%; semantic match | [.md](https://openaitools.app/tool/surferseo-com.md) | | 5 | [Isgen AI Detector](https://openaitools.app/tool/isgen-ai) | 901,917 | +5.8% | Freemium | Multilingual AI detector with sentence-level insight | category: ai-detector; semantic match | [.md](https://openaitools.app/tool/isgen-ai.md) | | 6 | [Detecting-AI.com](https://openaitools.app/tool/detecting-ai-com) | 505,146 | +493% | Freemium, Paid | AI detector that highlights evidence, not just a score | category: ai-detector; semantic match | [.md](https://openaitools.app/tool/detecting-ai-com.md) | | 7 | [Originality.ai](https://openaitools.app/tool/originality) | 2,049,639 | +2.8% | Paid | AI detector, plagiarism and content-quality checks in one scan | category: ai-detector; semantic match | [.md](https://openaitools.app/tool/originality.md) | | 8 | [MyDetector](https://openaitools.app/tool/mydetector) | 534,478 | +1.1% | Free | Free AI detector with sentence-level insight and a humanizer | category: ai-detector; semantic match | [.md](https://openaitools.app/tool/mydetector.md) | | 9 | [Copyleaks](https://openaitools.app/tool/copyleaks) | 2,402,494 | -14.1% | Paid, Contact for Pricing | Enterprise AI and plagiarism detection for content integrity | category: ai-detector; semantic match | [.md](https://openaitools.app/tool/copyleaks.md) | | 10 | [Branded](https://openaitools.app/tool/gobranded-com) | 3,704,728 | +6.6% | Contact for Pricing | Targeted research audiences with AI-verified data quality | category: ai-detector; semantic match | [.md](https://openaitools.app/tool/gobranded-com.md) | | 11 | [InfraNodus](https://openaitools.app/tool/infranodus) | 62,927 | -9.9% | Freemium, Free Trial | AI text analysis with knowledge graphs to reveal topics and content gaps | keywords 100%; semantic match | [.md](https://openaitools.app/tool/infranodus.md) | | 12 | [Winston AI](https://openaitools.app/tool/winston-ai) | 604,454 | +5.4% | Freemium, Free Trial | Detect AI-generated text and images with benchmark-tested accuracy | category: ai-detector; semantic match | [.md](https://openaitools.app/tool/winston-ai.md) | | 13 | [Lynote](https://openaitools.app/tool/lynote) | 408,115 | +16.7% | Freemium | AI detector, humanizer, and all-in-one AI note-taking workspace | category: ai-detector; semantic match | [.md](https://openaitools.app/tool/lynote.md) | | 14 | [AI or Not](https://openaitools.app/tool/ai-or-not) | 375,863 | +12.3% | Freemium, Contact for Pricing | Multi-modal AI detection API that flags synthetic images, text, audio, video and deepfakes | category: ai-detector; semantic match | [.md](https://openaitools.app/tool/ai-or-not.md) | | 15 | [Humanize AI Text](https://openaitools.app/tool/humanizeaitext-ai) | 388,576 | +35.2% | Freemium | Turn AI-generated text into natural, human-sounding writing | category: ai-detector; semantic match | [.md](https://openaitools.app/tool/humanizeaitext-ai.md) | | 16 | [AI Detector Writer](https://openaitools.app/tool/ai-detector-writer) | 111,129 | +41.6% | Free | Free, unlimited AI content detection with sentence-level scoring | category: ai-detector; semantic match | [.md](https://openaitools.app/tool/ai-detector-writer.md) | | 17 | [PlagiarismCheck.org](https://openaitools.app/tool/plagiarismcheck-org) | 368,384 | +6.1% | Paid | Accuracy-first plagiarism and AI detection for schools, universities, and teams | category: ai-detector; semantic match | [.md](https://openaitools.app/tool/plagiarismcheck-org.md) | | 18 | [Detector.io](https://openaitools.app/tool/ai-detector-io) | 60,069 | -20.2% | Freemium | Compare five AI detectors and humanize flagged lines in one dashboard | category: ai-detector; semantic match | [.md](https://openaitools.app/tool/ai-detector-io.md) | | 19 | [ZeroGPT.CC](https://openaitools.app/tool/zerogpt-cc) | 78,737 | -8.2% | Freemium | Free AI content detector with sentence-level analysis | category: ai-detector; semantic match | [.md](https://openaitools.app/tool/zerogpt-cc.md) | | 20 | [Dechecker](https://openaitools.app/tool/dechecker) | 111,347 | +4.2% | Freemium | Free AI content detector that flags machine-written text and helps you rewrite it | category: ai-detector; semantic match | [.md](https://openaitools.app/tool/dechecker.md) | | 21 | [UndetectedGPT](https://openaitools.app/tool/undetectedgpt) | 102,992 | -1.2% | Freemium | Humanize AI text and check it against major detectors | category: ai-detector; semantic match | [.md](https://openaitools.app/tool/undetectedgpt.md) | | 22 | [AI Undetect](https://openaitools.app/tool/ai-undetect) | 113,490 | -10.8% | Freemium, Paid | Humanize AI text and check it against multiple AI detectors in one place | category: ai-detector; semantic match | [.md](https://openaitools.app/tool/ai-undetect.md) | | 23 | [Sidekicker](https://openaitools.app/tool/sidekicker-ai) | 129,722 | -9.1% | Free Trial, Paid | AI humanizer, detector and plagiarism checker in one writing toolkit | category: ai-detector; semantic match | [.md](https://openaitools.app/tool/sidekicker-ai.md) | | 24 | [AI Detector for PPT](https://openaitools.app/tool/ai-detector-for-ppt) | 26,823 | -38.6% | Free Trial, Paid | Detect AI-written slides in any PowerPoint deck | category: ai-detector; semantic match | [.md](https://openaitools.app/tool/ai-detector-for-ppt.md) | Page 1 of 37 · [Next page →](https://openaitools.app/index.md?q=Topic+detection&page=2) For programmatic access use `https://openaitools.app/api/tools?q=…` or MCP `https://openaitools.app/api/mcp`. --- Source: https://openaitools.app/?q=Topic%20detection More Markdown: [Categories](https://openaitools.app/categories.md) · [Traffic rankings](https://openaitools.app/rankings.md) · [llms.txt](https://openaitools.app/llms.txt)