# AI tools for “data preprocessing”

103 matching tools; showing 24, ranked by relevance.

Filters: `group=coding-development`, `platform=website`

| # | Tool Name | Monthly Visits | MoM Growth Rate | Pricing Model | Summary | Why it matched | Profile (Markdown) |
| :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- |
| 1 | [Prolific](https://openaitools.app/tool/prolific-com) | 18,697,671 | -1.8% | Paid | High-quality human data for AI training, evaluation, and research | semantic match | [.md](https://openaitools.app/tool/prolific-com.md) |
| 2 | [WaterCrawl](https://openaitools.app/tool/watercrawl) | 5,392 | +42.7% | Freemium | Open-source web crawling that turns sites into LLM-ready data | keywords 100%; semantic match | [.md](https://openaitools.app/tool/watercrawl.md) |
| 3 | [clickworker](https://openaitools.app/tool/clickworker-com) | 1,861,149 | +0.5% | Contact for Pricing | Crowdsourcing data services for AI training and market data | semantic match | [.md](https://openaitools.app/tool/clickworker-com.md) |
| 4 | [Bright Data](https://openaitools.app/tool/bright-data) | 802,752 | -5.9% | Free Trial, Paid | Web data infrastructure for scraping, proxies, and AI-ready datasets | semantic match | [.md](https://openaitools.app/tool/bright-data.md) |
| 5 | [Appen](https://openaitools.app/tool/appen-com) | 665,840 | +0.2% | Contact for Pricing | Human-validated training data and evaluation services for frontier AI models | semantic match | [.md](https://openaitools.app/tool/appen-com.md) |
| 6 | [Scale](https://openaitools.app/tool/scale) | 616,915 | +12.5% | Contact for Pricing | The data, evaluations and systems behind AI that has to be right. | semantic match | [.md](https://openaitools.app/tool/scale.md) |
| 7 | [Octoparse](https://openaitools.app/tool/octoparse) | 184,251 | +1.2% | Freemium, Free Trial, Paid, Contact for Pricing | Agentic, no-code web scraping that turns any URL into clean structured data | semantic match | [.md](https://openaitools.app/tool/octoparse.md) |
| 8 | [SuperAnnotate](https://openaitools.app/tool/super-annotate) | 386,034 | +37.4% | Free Trial, Contact for Pricing | AI data infrastructure for building production-grade models | semantic match | [.md](https://openaitools.app/tool/super-annotate.md) |
| 9 | [Thor Data](https://openaitools.app/tool/thor-data) | 181,966 | -3.5% | Free Trial, Paid | Proxies and web data APIs for scraping and AI pipelines | semantic match | [.md](https://openaitools.app/tool/thor-data.md) |
| 10 | [Encord](https://openaitools.app/tool/encord-com) | 244,204 | +9.4% | Contact for Pricing | The multimodal data layer for computer vision and physical AI teams | semantic match | [.md](https://openaitools.app/tool/encord-com.md) |
| 11 | [Surge AI](https://openaitools.app/tool/surgehq-ai) | 245,142 | +6.6% | Contact for Pricing | Expert human data and evaluation for training frontier AI | semantic match | [.md](https://openaitools.app/tool/surgehq-ai.md) |
| 12 | [711Proxy](https://openaitools.app/tool/711proxy) | 138,446 | -15.8% | Paid | Global residential, mobile and ISP proxies built for large-scale data collection | semantic match | [.md](https://openaitools.app/tool/711proxy.md) |
| 13 | [V7 Go](https://openaitools.app/tool/v7-lab) | 116,919 | -11.6% | Free Trial, Contact for Pricing | AI workflow platform for document-heavy back-office operations | semantic match | [.md](https://openaitools.app/tool/v7-lab.md) |
| 14 | [Datalab](https://openaitools.app/tool/datalab-to) | 73,396 | +66% | Freemium, Contact for Pricing | High-precision document parsing and structured extraction API | semantic match | [.md](https://openaitools.app/tool/datalab-to.md) |
| 15 | [Monkt](https://openaitools.app/tool/monkt) | 51,826 | +47.4% | Paid | Turn any document into AI-ready Markdown or structured JSON | semantic match | [.md](https://openaitools.app/tool/monkt.md) |
| 16 | [DocuClipper](https://openaitools.app/tool/docuclipper) | 78,725 | +19.7% | Free Trial, Contact for Pricing | Bank statement converter that checks its own work | semantic match | [.md](https://openaitools.app/tool/docuclipper.md) |
| 17 | [Crustdata](https://openaitools.app/tool/crustdata) | 100,533 | +1.2% | Contact for Pricing | Real-time B2B people and company data for AI agents | semantic match | [.md](https://openaitools.app/tool/crustdata.md) |
| 18 | [Veryfi](https://openaitools.app/tool/veryfi-com) | 104,470 | -11.5% | Paid, Contact for Pricing, Free | OCR and multi-modal document extraction APIs with built-in fraud detection | semantic match | [.md](https://openaitools.app/tool/veryfi-com.md) |
| 19 | [Anakin](https://openaitools.app/tool/anakin) | 76,886 | -31.6% | Freemium | One scraping API that turns any website into agent-ready JSON | semantic match | [.md](https://openaitools.app/tool/anakin.md) |
| 20 | [Docsumo](https://openaitools.app/tool/docsumo) | 45,561 | -24% | Enterprise Pricing + Free Trial | Document AI agents that collect, extract, and cross-check documents | semantic match | [.md](https://openaitools.app/tool/docsumo.md) |
| 21 | [Databar.ai](https://openaitools.app/tool/databar-ai-2-0) | 34,140 | -27.4% | Freemium, Paid | 160+ data providers behind one table, API and MCP server | semantic match | [.md](https://openaitools.app/tool/databar-ai-2-0.md) |
| 22 | [Airparser](https://openaitools.app/tool/airparser) | 34,705 | -9.5% | Freemium, Free Trial, Paid | Parse emails, PDFs, and documents into structured JSON with LLM-powered extraction | semantic match | [.md](https://openaitools.app/tool/airparser.md) |
| 23 | [BasicAI Cloud](https://openaitools.app/tool/basicai-cloud) | 21,670 | -13.1% | Freemium, Enterprise Quote | AI data annotation platform and managed labeling services for AI training data | semantic match | [.md](https://openaitools.app/tool/basicai-cloud.md) |
| 24 | [Handwriting OCR](https://openaitools.app/tool/handwriting-ocr) | 52,212 | +96.2% | Freemium, Paid | Turn messy handwriting into clean, editable digital text | semantic match | [.md](https://openaitools.app/tool/handwriting-ocr.md) |

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Source: https://openaitools.app/?q=data%20preprocessing

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