Open-source alternatives to DotnetSpider

PythonSpiderNotes is a comprehensive instructional resource and framework for building web crawlers and extracting data using the Python programming language. It provides a set of methods for parsing unstructured HTML and JSON data into structured formats for persistent storage. The project includes detailed guides and tutorials on browser automation for retrieving dynamic content, as well as a framework for data extraction. It specifically covers anti-bot bypass techniques, such as rotating proxies and spoofing headers, to avoid IP blocks and detection systems. The capability surface extend

node-crawler is a programmable web crawler for Node.js that manages request queues and automates data extraction. It functions as a rate-limited HTTP client and a headless HTML parser, providing the infrastructure to visit large sets of URLs asynchronously while preventing duplicate processing through task deduplication. The project distinguishes itself through a proxy rotation manager that cycles user agents and proxy servers to bypass access restrictions. It utilizes the HTTP/2 protocol to improve request performance and server compatibility during large-scale scraping operations. The syst

Colly is a web scraping framework and concurrent crawler written in Go. It provides a system for traversing web pages, following links, and extracting structured data from HTML and XML documents. The framework includes a distributed scraping engine designed to spread data collection tasks across multiple instances to increase throughput. It ensures compliance with website owner policies by automatically reading and respecting robots.txt files. The system manages request lifecycles through domain-based rate limiting, concurrency controls, and session management via a stateful cookie jar. It s

This project is a Python-based automation toolkit designed to manage programmatic authentication and session persistence across web services. It provides a framework for executing automated login sequences, including the handling of interactive security challenges such as QR code verification and captcha resolution. The toolkit distinguishes itself by simulating native mobile application environments, allowing for the execution of scripts that require specific device-level headers and behaviors. It also incorporates hook-based interception to monitor workflow states and manage exceptions duri

This project is a Python web scraping library and automated data collection suite. It provides tools for extracting structured data from websites, implementing web crawlers to navigate site links, and parsing HTML DOM structures to isolate specific elements and attributes. The toolkit includes a pipeline for processing unstructured text and cleaning raw web content to extract meaningful information. It also features capabilities for image data extraction and the integration of external APIs to retrieve structured data from remote endpoints. The system covers broad capability areas including

Crawlab is a distributed web scraping platform designed to centralize the management, deployment, and execution of large-scale data extraction tasks. It functions as a control plane that orchestrates scraping scripts and automated workflows across multiple nodes, providing a unified environment for managing complex data collection operations. The platform distinguishes itself through a distributed architecture that coordinates worker nodes via a central master, utilizing real-time communication to maintain oversight of all active processes. It ensures operational consistency by isolating task

PySpider is a Python web crawling framework designed for automated data extraction. It provides a pipeline for periodically fetching web content, processing HTML, and persisting scraped information into database backends. The system features a web-based management interface for editing scraping scripts, monitoring task progress, and reviewing collected data. It includes a headless browser JavaScript renderer to capture rendered HTML from dynamic web pages and a distributed architecture that uses message queues to scale crawling workloads across multiple nodes. The framework also covers task

This project is a comprehensive resource directory for web data extraction, providing a curated collection of tools and libraries for parsing data, automating browsers, and managing network operations. It serves as a guide for extracting structured information from HTML, XML, JSON, and PDF formats. The toolkit focuses on advanced data collection strategies, including headless browser automation to interact with JavaScript and a suite of network utilities for DNS resolution and WebSocket connections. It specifically covers methods for bypassing bot protections through proxy pool management, us

Goutte is a PHP web scraper and DOM crawler designed for extracting data from websites. It functions as an HTTP client wrapper that enables the retrieval of web pages and the parsing of HTML content. The project provides a web form automator to programmatically fill and submit HTML forms to remote servers. It also includes a mechanism for automated website crawling by following links to discover and archive web content. The system supports stateful session management to maintain cookies and headers across requests. It further covers HTML data extraction through DOM-based element selection an

Subfinder is a security reconnaissance framework designed for subdomain enumeration and attack surface management. It functions as a discovery engine that identifies and maps internet-exposed infrastructure, cloud-hosted assets, and network ranges to maintain a comprehensive inventory of an organization's digital footprint. The project distinguishes itself through a modular, template-driven scanning engine that executes security checks against discovered assets. It leverages cloud-native asset discovery to query provider APIs and infrastructure metadata, while supporting distributed agent orc

Firecrawl is a web data extraction platform designed to convert unstructured web content into clean, LLM-ready formats like markdown or JSON. It functions as an autonomous web crawler and scraper, capable of mapping entire domains, performing recursive navigation, and executing complex data gathering tasks. By leveraging headless browser orchestration, the system handles dynamic, JavaScript-heavy pages to ensure comprehensive data capture. The platform distinguishes itself through its focus on agentic workflows, providing a programmatic interface that allows autonomous agents to perform live

Katana is a web crawler and spider designed for security reconnaissance and web application mapping. It functions as a utility for identifying endpoints, forms, and API structures across web targets by combining standard HTTP request traversal with headless browser automation to render dynamic, JavaScript-heavy content. The tool distinguishes itself through its ability to maintain authenticated sessions and handle complex web interactions, such as automated form submission and captcha resolution. It provides granular control over the discovery process, allowing users to define specific crawl

Photon is a command-line web crawler designed for security reconnaissance and information gathering. It systematically traverses websites to discover URLs, map domain infrastructure, and identify associated subdomains by retrieving DNS records. The tool distinguishes itself through its ability to perform deep content analysis, including the extraction of sensitive data such as API keys and authentication tokens using user-defined regular expressions. It supports offline inspection by cloning crawled web content to the local filesystem, allowing for structural analysis without additional netwo

This project is an LLM-powered web crawler and data extractor that uses large language models to navigate websites and parse content into structured JSON or Markdown formats. It functions as an automated browser orchestrator and domain discovery engine, interpreting plain English instructions to identify relevant pages and extract specific information. The system distinguishes itself through agentic browser automation, allowing it to perform human-like interactions such as clicking buttons and scrolling based on natural language commands. It employs goal-oriented crawling to analyze website s

This project is a Model Context Protocol server that connects large language models to web scraping and crawling tools. It functions as a bridge, allowing LLM clients to utilize a web crawling engine and scraping utilities to extract and process web data. The server integrates a markdown web converter that transforms dynamic web pages and PDF documents into clean markdown to optimize consumption by AI models. It also provides a browser automation interface for controlling headless sessions and bypassing access restrictions. The system covers broad capabilities including large-scale website d

This project is a Node.js web scraping framework designed to automate data extraction through a programmatic workflow of requests, parsing, and document interaction. It functions as a headless web crawler, an HTTP request manager, and a DOM parser and extractor. The framework distinguishes itself by combining a JavaScript execution engine to interact with dynamic content and a hybrid selection system that utilizes both CSS and XPath selectors. It includes specialized middleware for proxy rotation and cookie-jar session management to maintain authenticated states and manage automated traffic.

ChatPaper is a suite of AI agents and utilities designed for academic literature automation, manuscript editing, and research assistance. The system functions as a research assistant that summarizes, translates, and analyzes scholarly papers, while providing specialized tools for converting academic PDFs into structured markdown to preserve formulas for analysis. The project features a literature survey automator that crawls research repositories and synthesizes domain reports, alongside a research mind map generator that transforms linear document content into non-linear node-based maps. It

Distribute crawler is a distributed web scraping framework that integrates with Scrapy to coordinate multiple crawler instances across clusters. It utilizes a centralized task queue to manage and scale concurrent data collection operations, enabling horizontal scaling of scraping tasks across multiple worker nodes. The framework distinguishes itself through its focus on large-scale data management and traffic control. It persists scraped items and binary assets into document-oriented database clusters, utilizing deduplication logic to optimize bandwidth and storage. To maintain consistent dat

DocSearch is an integrated toolset for adding search capabilities to documentation websites. It provides a JavaScript and React search interface for embedding autocomplete search bars, a dedicated web crawler to extract and synchronize site content into a searchable index, and a monitoring system to track user queries and interaction events. The project distinguishes itself by incorporating a conversational AI assistant powered by retrieval-augmented generation. This assistant grounds a large language model in a specific documentation index to provide factual answers, with configurable system

DotnetSpider is a .NET web crawling framework and C# data extraction tool designed for automated web page discovery and the retrieval of structured data from the internet at scale. It functions as a high-level web scraping library for collecting information from various websites. The framework provides capabilities for automated web crawling and large-scale data scraping. It enables web content extraction to facilitate the creation of local databases or the analysis of online information through programmatic web automation within the .NET ecosystem. The system utilizes a pipeline-based data

Scraperr is a self-hosted web scraping and crawling platform designed for extracting structured data from websites using XPath selectors. It functions as a containerized system for managing scraping jobs through a queue and analyzing the resulting content using artificial intelligence. The project differentiates itself through its Kubernetes-native architecture, allowing for scalable deployment and management via package managers. It includes a crawling engine capable of domain-level spidering to discover linked pages and a data analyzer that uses artificial intelligence to query extracted we

TorBot is a suite of specialized tools for accessing and exploring hidden services on the Tor network. It functions as an onion crawler and web scraper that discovers hidden services by navigating onion domains to extract page titles, host names, and site descriptions. The project distinguishes itself through link relationship mapping and hidden service verification. It generates visual trees of connectivity across the Tor network to map how different onion services relate to one another and includes a scanner to verify if specific hidden service addresses are live and reachable. These capab

This project is a reference library of architectural blueprints, study materials, and design patterns for building scalable, high-availability distributed systems. It serves as a technical guide for scalability engineering, providing structural solutions for common engineering challenges. The repository focuses on distributed systems design, covering essential patterns for data replication, consensus algorithms, and transaction management. It distinguishes itself by offering detailed blueprints for specialized domains, including real-time data streaming, large-scale data storage, and high-ava

AnyCrawl is an AI-powered data extractor, automated web crawler, and headless browser orchestrator. It serves as a web content extraction API and a gateway that connects crawling and scraping tools to language models using a standardized API protocol. The project specializes in converting unstructured website content into structured JSON or markdown optimized for AI assistants. It utilizes language models and JSON schemas to pull specific information into validated formats and provides capabilities for AI page summarization and LLM-optimized content extraction. The system manages comprehensi

Firecrawl is a headless browser automation tool and web crawling engine designed to extract structured data from the web. It functions as an API that transforms raw website content and documents into clean markdown and JSON formats to serve as context for large language models. The project distinguishes itself by using natural language prompts to translate human instructions into targeted data extraction tasks and browser actions. It can execute interactive page navigation, such as clicking and scrolling, and perform automated web research to retrieve structured data without manual interventi

Pholcus is a distributed web crawling system designed for large-scale data scraping. It employs a master-worker distribution model to coordinate high-concurrency scraping tasks across a network of remote client nodes, enabling both horizontal and vertical data collection. The system features a hot-loadable rule engine that allows extraction and navigation logic to be updated at runtime without restarting the process. It handles dynamic content through headless browser integration and bypasses bot detection using proxy rotation, automated user authentication, and simulated human behavior. The

Crawler4j is a multi-threaded Java web crawler and spider designed for high-volume web traversal and content extraction. It functions as a polite crawling framework that enables the discovery and indexing of HTML and binary content across multiple websites. The project distinguishes itself through a persistent crawling model that serializes session state to local storage, allowing the engine to resume indexing after a crash or interruption. It includes a politeness controller to regulate request frequency and delays, preventing server overloading and IP blocking. The system covers a broad ra