Pdfstract vs Spider Cloud

Side-by-side comparison of features, pricing, and ratings

Analysis reviewed Live tool data as of 2026-09-01
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At a glance

DimensionPdfstractSpider Cloud
PricingFree (open source, MIT license)Freemium (pay per page; ~$0.03/1K pages; AI Studio $6/mo add-on)
Core functionalityPDF extraction, chunking, and embedding for RAGWeb crawling & scraping API for AI agents
Output formatsEmbeddings (vector), text chunksMarkdown, HTML, JSON, CSV, XML, plain text, screenshots
Extraction methods10+ libraries (Marker, Docling, PyMuPDF4LLM, etc.)Rust engine + AI models (Spider Silk) + Browser AI commands
Best forDevelopers building RAG pipelines from PDFsAI agents needing real-time web data
IntegrationsMarker, Docling, PyMuPDF4LLM, OpenAI, Sentence TransformersLangChain, LlamaIndex, CrewAI, GCS, S3, Supabase, etc.

Choose Spider Cloud if you need real-time web data—crawling, scraping, and AI-structured extraction at scale—for AI agents or RAG pipelines. Choose Pdfstract if your data source is PDFs and you want a free, open-source tool that handles extraction, chunking, and embedding in one command. They are complementary: Spider Cloud brings web content into your pipeline; Pdfstract prepares local PDFs for vector storage.

Try PdfstractTry Spider Cloud
Pdfstract
Pdfstract

Open-source PDF-to-vector pipeline for RAG in one command.

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Spider Cloud
Spider Cloud

AI web scraping API: crawl, scrape, search any site into markdown or JSON at 10k req/min.

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Pricing
Free
Freemium
Plans
$0
$1/GB + $0.001/min compute
$40/mo (2 concurrency)
$6/mo
Popularity
0 views
7.5k views
Skill Level
Intermediate
Intermediate
API Available
Platforms
CLIAPIWeb
WebAPICLI
Categories
📑 Document AI & Data Extraction🗄️ Vector Databases & Retrieval📊 Data & Analytics
🌐 Web Scraping & Search APIs🖱️ Browser & Computer-Use Agents
Features
PDF extraction using 10+ libraries (Marker, Docling, PyMuPDF4LLM, etc.)
10+ chunking methods including AI-powered semantic chunking
Embedding generation via OpenAI, Sentence Transformers, local models
Unified API with single parameter switching between backends
Auto-detection of optimal extraction library per document
CLI interface for scripting and automation
Web UI for interactive use
Python package for integration into custom pipelines
Batch processing of multiple PDFs
Open source under MIT license
Outputs vector-ready data for RAG ingestion
Configurable extraction and chunking settings
Supports local and remote embedding models
Scrape any website into markdown, JSON, or raw HTML
Full-site crawling at 100K+ pages/sec
10,000 core API requests per minute default
Web Search API: SERP + scraping + extraction in one call
/ai/search endpoint with relevance gate to skip irrelevant pages
Silk AI model: HTML-to-structured data and captcha solving on GPUs
Browser Cloud: full browser sessions over CDP
AI commands (Act, Extract, Observe) via WebSocket with AI Studio
Multiple output formats: HTML, raw, plain text, markdown, JSON, JSONL, CSV, XML
Stealth browser layer and Unblocker for anti-bot sites
Proxy pool with 215M+ residential and ISP IPs across 199+ countries
Robots.txt compliance on by default, disable per-request
data_connectors parameter: pipe results to S3, GCS, Google Sheets, Azure Blob, Supabase
extraction_schema parameter: AI output conforms to JSON schema
1,000+ ready-made scraper examples across 32 categories
Integrations
Marker
Docling
PyMuPDF4LLM
OpenAI
Sentence Transformers
LangChain
LlamaIndex
CrewAI
FlowiseAI
AutoGen
Agno

Who should pick which

  • Solo founder building an AI agent that needs live web data
    Pick: Spider Cloud

    Spider Cloud provides real-time crawling, AI extraction, and Browser commands via WebSocket, perfect for agents that need to navigate and extract data from web pages.

  • Data scientist preparing PDF datasets for RAG
    Pick: Pdfstract

    Pdfstract offers a unified command to extract, chunk, and embed PDFs using best-of-breed libraries. It's free and integrates directly with embedding models.

  • RAG pipeline developer needing both web and PDF data
    Pick: Spider Cloud

    Spider Cloud can feed web content into the pipeline; Pdfstract can be used separately for PDFs. Both are complementary, but if forced to pick one, Spider Cloud is more versatile across data sources.

  • Team on a tight budget needing high-volume web scraping
    Pick: Spider Cloud

    At ~$0.03/1K pages, Spider Cloud is low-cost per page; failed requests are not billed. Its 99.9% success rate means efficient spending.

  • Non-technical user wanting simple PDF extraction
    Pick: Pdfstract

    Pdfstract's Web UI provides a no-code interface for interactive use, though some CLI knowledge is still useful.

Frequently Asked Questions

Pdfstract vs Spider Cloud: which should you choose?

Choose Spider Cloud if you need real-time web data—crawling, scraping, and AI-structured extraction at scale—for AI agents or RAG pipelines. Choose Pdfstract if your data source is PDFs and you want a free, open-source tool that handles extraction, chunking, and embedding in one command. They are complementary: Spider Cloud brings web content into your pipeline; Pdfstract prepares local PDFs for vector storage.

Can Spider Cloud handle PDF extraction?

Spider Cloud primarily extracts from web pages. It does not have dedicated PDF extraction like Pdfstract.

Is Pdfstract suitable for real-time web crawling?

No, Pdfstract is designed for local PDF files, not web crawling.

Which tool is cheaper for large-scale processing?

For web scraping, Spider Cloud's pay-per-page model is cost-effective (~$0.03/1K pages). Pdfstract is free but requires you to manage your own infrastructure.

Do both tools support integration with LangChain?

Spider Cloud integrates directly with LangChain. Pdfstract outputs chunks/embeddings that can be used in LangChain, but it has no native LangChain integration.

Can Spider Cloud bypass CAPTCHAs?

Yes, Spider Cloud uses its Spider Silk AI model and rotating proxies to solve CAPTCHAs and avoid blocking.

Is Pdfstract open source?

Yes, Pdfstract is open source under the MIT license, allowing free use and modification.

Which tool offers AI-driven chunking?

Pdfstract offers AI-driven semantic chunking. Spider Cloud does not chunk; it provides structured output per page.

Can I use Spider Cloud for free?

Spider Cloud has a freemium model with a free tier (limited pages). Pdfstract is completely free.

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Explore each tool further

Pdfstract
View Pdfstract reviewPdfstract alternatives
Spider Cloud
View Spider Cloud reviewSpider Cloud alternatives

Browse these categories

Best AI Document AI & Data Extraction toolsBest AI Web Scraping & Search APIs toolsBest AI Vector Databases & Retrieval toolsBest AI Browser & Computer-Use Agents tools
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Last reviewed: July 3, 2026