castle.io
Get leads like Castle — and thousands more
Build targeted lists by tech stack, traffic, and more
Castle: Enterprise Security, Zero Friction
A $2.9M ARR startup bridging the gap between robust fraud prevention and seamless user experience
Castle is quietly building the security layer that modern SaaS teams actually want to use—combining Cloudflare's edge power with SDK-level user monitoring to stop fraud without adding login friction.
"Castle doesn't just detect fraud—it removes the excuses for bad security UX."
The Invisible Security Layer
With 61,477 monthly visits and 50% coming from organic search, Castle has positioned itself as the go-to solution for teams who've outgrown basic CAPTCHAs. Their 28-person team is punching way above its weight, targeting enterprise security budgets without the enterprise bloat.
The Growth Narrative
Castle's $11.6M in funding against $2.9M revenue suggests they're in aggressive R&D mode. The traffic data reveals a sophisticated audience—600k global rank isn't mass-market, it's precision-targeted. These aren't random visitors; they're security engineers and product leads actively searching for 'castle login' and 'castle app login' solutions.
The tech stack tells a story of modern web development: Tailwind CSS, GSAP for animations, and Segment for analytics. They're not just building a security tool; they're building a platform that feels like a product. The fact that they offer both Cloudflare integration and custom edge stack options shows they understand that one size doesn't fit all in enterprise security.
- No-code Cloudflare integration meets enterprise-grade fraud detection
- SDK-level monitoring that doesn't break user experience
- Custom edge stack support for teams with specific infrastructure needs
- 28-person team with deep technical leadership from Johan Brissmyr and Sebastian Wallin
Castle wins by making security invisible
They're not selling protection—they're selling the absence of friction. That's a $10B+ market waiting to be captured.
What tech stack does Castle use?
How much traffic does Castle get?
Traffic & Engagement
Traffic Sources
Where is Castle's audience located?
What keywords does Castle rank for?
5 keywordsHow is Castle's SEO?
Open Graph Image
https://castle.io/assets/img/screenshot.png
Meta Tags
Stop bots and account abuse in minutes
Connect Castle to Cloudflare with no code, or use your own edge stack. Use the SDK to monitor users and stop fraud in-app. Enterprise security without the friction.
H1 Tags
Schema Types
What is Castle's revenue?
Who works at Castle?
Loading leads...
What do customers think of Castle?
Castle
Categories
Activity & Engagement
Contact Information
Reviews (0)
No reviews found. Reviews may not be available in the initial page load. Try refreshing or check the Trustpilot page directly.
Frequently Asked Questions about Castle
What is Castle's Revenue?
What does Castle do?
How fast is Castle growing?
What technologies does Castle use?
Who are Castle's competitors?
What do customers think of Castle?
Export Data
Unlock all exports
Download CSVs, JSONs & full reports
How to contact Castle?
Export castle.io Data
Download the complete tech stack, analytics, leads, and company data for castle.io in JSON or CSV format. Use it for your sales pipeline, competitive analysis, or research.
Raw JSON Data
Click "Show" to view the raw API response data
About castle.io
Connect Castle to Cloudflare with no code, or use your own edge stack. Use the SDK to monitor users and stop fraud in-app. Enterprise security without the friction.
Company Overview
Contact castle.io
Technology Stack
castle.io uses 31 technologies across their website including Wistia, Font Awesome, Google Fonts, HSTS, and more.
Video
Wistia
Fonts
Font Awesome, Google Fonts
Security
HSTS
Error Tracking
Sentry
Backend Frameworks
Laravel
CMS
Framer, Squarespace, Webflow
Traffic & Audience
castle.io receives approximately 61.5K monthly visitors and ranks #606,446 globally. The website has a bounce rate of 44% with visitors viewing an average of 1.6 pages per visit. Users spend an average of 0:27 on the site.
The majority of castle.io's traffic comes from undefined, undefined, .
Frequently Asked Questions
What is castle.io?
How much does castle.io cost?
What technologies does castle.io use?
How do I contact castle.io?
Is castle.io hiring?
How popular is castle.io?
Related Searches
This page provides publicly available information about castle.io. Data is collected from various public sources and may not always be up to date. For the most accurate information, please visit castle.io directly at https://castle.io.