# castle.io

> AI-optimized mirror of castle.io containing 36 pages totalling 41,119 words of clean markdown content, structured data, and semantic HTML. Original source: https://castle.io. Last updated: 2026-08-08T08:44:42.239Z.

Each page is available as HTML (with JSON-LD structured data) and Markdown (text-only, ideal for LLMs and RAG).

## Homepage

- [Castle – Stop bots and account abuse at scale](/content/site-root.html): A complete suite of SDKs and APIs to monitor users, block bots, and stop in-app fraud. (557 words)

## Articles & Blog Posts

- [research/botmasterlabs-powering-an-era-of-spam-pdf.html](/content/research/botmasterlabs-powering-an-era-of-spam-pdf.html) (1,903 words)
- [Information Security Policy – Castle](/content/trust/index.html): Learn how Castle collects, uses and protects personal information. (2,018 words)
- [BotmasterLabs: Powering an Era of Spam – Castle](/content/research/botmasterlabs-powering-an-era-of-spam/index.html): How XRumer and XEvil scaled forum spam by combining automation, CAPTCHA solving, and brittle fingerprinting. (1,777 words)
- [Terms of Use – Castle](/content/terms/index.html): Terms and conditions for using the Castle service (1,218 words)
- [Privacy Policy – Castle](/content/privacy/index.html): Learn how Castle collects, uses, and protects personal information (1,380 words)
- [Account Takeovers – Castle](/content/use-cases/account-takeovers/index.html): Protect from account takeovers in minutes. Efficiently prevent account takeovers with a our five minute frontend and backend integration. (566 words)
- [Transaction Abuse – Castle](/content/use-cases/transaction-abuse/index.html): Combat transaction abuse in minutes. Efficiently weed out transaction abuse with a our five minute frontend and backend integration. (497 words)
- [Pricing – Castle](/content/pricing/index.html): Get started with options that fit your needs. Fully transparent pricing with linear scaling and no hidden fees. (733 words)
- [Account Sharing – Castle](/content/use-cases/account-sharing/index.html): Tackle account sharing in minutes. Efficiently weed out account sharing with a our five minute frontend and backend integration. (521 words)
- [Fake Accounts – Castle](/content/use-cases/fake-accounts/index.html): Block fake accounts in minutes. Efficiently weed out fake accounts with a our five minute frontend and backend integration. (547 words)
- [SMS Pumping – Castle](/content/use-cases/sms-pumping/index.html): Thwart SMS pumping in minutes. Efficiently weed out SMS pumping with a our five minute frontend and backend integration. (418 words)
- [API Abuse – Castle](/content/use-cases/api-abuse/index.html): Deal with API abuse in minutes. Efficiently weed out API abuse with a our five minute frontend and backend integration. (506 words)
- [Content Abuse – Castle](/content/use-cases/content-abuse/index.html): Mitigate content abuse in minutes. Efficiently weed out content abuse with a our five minute frontend and backend integration. (408 words)
- [Multi-Accounting – Castle](/content/use-cases/multi-accounting/index.html): Prevent multi-accounting in minutes. Efficiently weed out multi-accounting with a our five minute frontend and backend integration. (444 words)
- [Brand Assets – Castle](/content/brand-assets/index.html): Download official Castle logos and access our brand color palette. (214 words)
- [Research – Castle](/content/research/index.html): Our research investigates security, fraud, and bot detection through the lens of deep dive analysis and data science. (206 words)
- [Customers: Housecall Pro – Castle](/content/customers/housecall-pro/index.html): An industry-leading software solution empowering home service professionals to run all aspects of their business, from scheduling to payments. (299 words)
- [Customers – Castle](/content/customers/index.html): Trusted by leading enterprises globally, Castle's fraud prevention and account security platform brings unmatched security and reliability to your operations. (350 words)
- [Customers: Rue La La – Castle](/content/customers/rue-la-la/index.html): A platform boasting over 16 million members seeking top brands across various categories. (249 words)
- [Customers: GitBook – Castle](/content/customers/gitbook/index.html): A developer friendly platform for publishing and sharing knowledge for technical teams, enabling teams to create, collaborate on, and publish knowledge bases. (283 words)
- [Customers: Touch of Modern – Castle](/content/customers/touch-of-modern/index.html): A leading e-commerce platform with over 14 million users, dedicated to unique and modern products. (261 words)
- [research/fingerprint-harvesting-in-the-bot-ecosystem-pdf.html](/content/research/fingerprint-harvesting-in-the-bot-ecosystem-pdf.html) (11,771 words)
- [Fingerprint harvesting in the bot ecosystem – Castle](/content/research/fingerprint-harvesting-in-the-bot-ecosystem/index.html): This report uncovers how bot ecosystems harvest and reuse real browser fingerprints, including signals from commercial anti-bot systems, to scale realistic impersonation. These fingerprints are becoming operational assets, enabling more efficient and harder-to-detect automation. The implication is clear: detection systems must assume replay and treat client-side signals as untrusted. (11,266 words)

## Listings & Categories

- [Naif Mehanna – Research – Castle](/content/research/author/naif-mehanna/index.html): Our research investigates security, fraud, and bot detection through the lens of deep dive analysis and data science. (41 words)
- [bot management – Research – Castle](/content/research/tag/bot-management/index.html): Our research investigates security, fraud, and bot detection through the lens of deep dive analysis and data science. (90 words)
- [fingerprinting – Research – Castle](/content/research/tag/fingerprinting/index.html): Our research investigates security, fraud, and bot detection through the lens of deep dive analysis and data science. (89 words)
- [spam – Research – Castle](/content/research/tag/spam/index.html): Our research investigates security, fraud, and bot detection through the lens of deep dive analysis and data science. (41 words)
- [Nicolas Sama – Research – Castle](/content/research/author/nicolas-sama/index.html): Our research investigates security, fraud, and bot detection through the lens of deep dive analysis and data science. (39 words)
- [Kurt Nistelberger – Research – Castle](/content/research/author/kurt-nistelberger/index.html): Our research investigates security, fraud, and bot detection through the lens of deep dive analysis and data science. (50 words)
- [Antoine Vastel – Research – Castle](/content/research/author/antoine-vastel/index.html): Our research investigates security, fraud, and bot detection through the lens of deep dive analysis and data science. (82 words)

## Products

- [IP Intelligence API – Castle](/content/product/ip-intelligence-api/index.html): Identify residential proxies, VPNs, and their operators with fresh IP intelligence built for real-time decisions. (862 words)
- [Rules – Castle](/content/product/rules/index.html): Run velocity-based rules in real-time. Castle's rules engine lets you create advanced velocity queries and to block requests in real-time, trigger workflows, and send alerts. (478 words)
- [Device Intelligence – Castle](/content/product/devices/index.html): Resilient device fingerprinting. Castle's device fingerprinting is engineered to circumvent ad blockers and privacy plugins. Up to 99.5% accuracy while maintaining a collision rate as low as 0.001%. (379 words)

## About Pages

- [About – Castle](/content/about/index.html): We're building trust infrastructure for the modern internet. Castle provides developer-grade infrastructure to stop bots, abuse, and fraud. We turn user behavior into real-time signals that power security for companies like Canva, Rockstar Games, and Atlassian. (480 words)
- [Contact – Castle](/content/contact/index.html): Get in touch with a friendly Castle specialist. Setting up your own integration is the fastest and most efficient way to start using Castle. (96 words)

## Resources

- [Full Page Index](/index.html): Browse all cached pages with rich metadata
- [About This Cache](/about.html): Methodology, technical details, and usage guidelines
- [XML Sitemap](/sitemap.xml): Machine-readable sitemap for crawler discovery
- [Robots.txt](/robots.txt): Crawler directives