# Top 10 Castle Alternatives & Competitors
**Average Rating:** 3.7/5
**Total Number of Reviews:** 3
Looking for alternatives or competitors to Castle? E-commerce Fraud Protection Software is a widely used technology, and many people are seeking quick, popular software solutions with id analytics, intelligence reporting, and bot mitigation. Other important factors to consider when researching alternatives to Castle include reliability and ease of use. The best overall Castle alternative is SEON. Other similar apps like Castle are Cisco Duo, Signifyd, Sift, and Fingerprint. Castle alternatives can be found in [E-commerce Fraud Protection Software](https://www.g2.com/categories/e-commerce-fraud-protection) but may also be in [Fraud Detection Software](https://www.g2.com/categories/fraud-detection) or [Password Managers](https://www.g2.com/categories/password-managers).


## Best Paid & Free Alternatives to Castle
  - [SEON](https://www.g2.com/products/seon/reviews)
  - [Cisco Duo](https://www.g2.com/products/cisco-duo/reviews)
  - [Signifyd](https://www.g2.com/products/signifyd/reviews)
  - [Sift](https://www.g2.com/products/sift-s-ai-powered-fraud-decisioning-platform-sift/reviews)
  - [Fingerprint](https://www.g2.com/products/fingerprintjs-fingerprint/reviews)
  - [LastPass](https://www.g2.com/products/lastpass/reviews)
  - [1Password](https://www.g2.com/products/1password/reviews)
  - [HAProxy](https://www.g2.com/products/haproxy/reviews)
  - [Cloudflare Application Security and Performance](https://www.g2.com/products/cloudflare-application-security-and-performance/reviews)
  - [OneLogin](https://www.g2.com/products/onelogin/reviews)

## Top 10 Alternatives to Castle Recently Reviewed By G2 Community
Browse options below. Based on reviewer data, you can see how Castle stacks up to the competition, check reviews from current & previous users in industries like Financial Services and Logistics and Supply Chain, and find the best product for your business.


  ### 1. [SEON](https://www.g2.com/products/seon/reviews)
By SEON
**Average Rating:** 4.6/5
**Total Reviews:** 379
SEON helps businesses detect fraud, uncover risk, and stay compliant—without slowing down growth. Our single API analyzes digital footprints, devices, and AML data using 900+ real-time, first-party signals. Teams can use machine learning or custom rules, expand globally in weeks, and automate decisioning without black-box limitations or slow onboarding.


Categories in common with Castle: [Fraud Detection](https://www.g2.com/categories/fraud-detection), [E-commerce Fraud Protection](https://www.g2.com/categories/e-commerce-fraud-protection)

**Compare:** [Castle vs SEON](https://www.g2.com/compare/castle-vs-seon)
**Compare SEON with other alternatives:**
- [SEON vs Cisco Duo](https://www.g2.com/compare/cisco-duo-vs-seon)
- [SEON vs Signifyd](https://www.g2.com/compare/seon-vs-signifyd)
- [SEON vs Sift](https://www.g2.com/compare/seon-vs-sift-s-ai-powered-fraud-decisioning-platform-sift)
- [SEON vs Fingerprint](https://www.g2.com/compare/fingerprintjs-fingerprint-vs-seon)
- [SEON vs LastPass](https://www.g2.com/compare/lastpass-vs-seon)
- [SEON vs 1Password](https://www.g2.com/compare/1password-vs-seon)
- [SEON vs HAProxy](https://www.g2.com/compare/haproxy-vs-seon)
- [SEON vs Cloudflare Application Security and Performance](https://www.g2.com/compare/cloudflare-application-security-and-performance-vs-seon)
- [SEON vs OneLogin](https://www.g2.com/compare/onelogin-vs-seon)

  ### 2. [Cisco Duo](https://www.g2.com/products/cisco-duo/reviews)
By Cisco
**Average Rating:** 4.5/5
**Total Reviews:** 509
Duo is a cloud-based access security platform built to protect access to any application, from any device. Duo’s passwordless authentication, single sign-on (SSO) and user-friendly multi-factor authentication make secure logins easy for users, reducing friction to their workflow.


Categories in common with Castle: [Risk-Based Authentication (RBA)](https://www.g2.com/categories/risk-based-authentication-rba)

**Compare:** [Castle vs Cisco Duo](https://www.g2.com/compare/castle-vs-cisco-duo)
**Compare Cisco Duo with other alternatives:**
- [Cisco Duo vs SEON](https://www.g2.com/compare/cisco-duo-vs-seon)
- [Cisco Duo vs Signifyd](https://www.g2.com/compare/cisco-duo-vs-signifyd)
- [Cisco Duo vs Sift](https://www.g2.com/compare/cisco-duo-vs-sift-s-ai-powered-fraud-decisioning-platform-sift)
- [Cisco Duo vs Fingerprint](https://www.g2.com/compare/cisco-duo-vs-fingerprintjs-fingerprint)
- [Cisco Duo vs LastPass](https://www.g2.com/compare/cisco-duo-vs-lastpass)
- [Cisco Duo vs 1Password](https://www.g2.com/compare/1password-vs-cisco-duo)
- [Cisco Duo vs HAProxy](https://www.g2.com/compare/cisco-duo-vs-haproxy)
- [Cisco Duo vs Cloudflare Application Security and Performance](https://www.g2.com/compare/cisco-duo-vs-cloudflare-application-security-and-performance)
- [Cisco Duo vs OneLogin](https://www.g2.com/compare/cisco-duo-vs-onelogin)

  ### 3. [Signifyd](https://www.g2.com/products/signifyd/reviews)
By Signifyd
**Average Rating:** 4.6/5
**Total Reviews:** 352
With identity and intent intelligence from the world’s largest network of online retailers, Signifyd’s Commerce Protection Platform instantly recognizes the ‘who’ behind every transaction. Every approved order is backed by a 100 percent financial guarantee against fraud and abuse, so merchants can automate payments at scale, streamline customer experiences and grow fearlessly.


Categories in common with Castle: [Fraud Detection](https://www.g2.com/categories/fraud-detection), [E-commerce Fraud Protection](https://www.g2.com/categories/e-commerce-fraud-protection)

**Compare:** [Castle vs Signifyd](https://www.g2.com/compare/castle-vs-signifyd)
**Compare Signifyd with other alternatives:**
- [Signifyd vs SEON](https://www.g2.com/compare/seon-vs-signifyd)
- [Signifyd vs Cisco Duo](https://www.g2.com/compare/cisco-duo-vs-signifyd)
- [Signifyd vs Sift](https://www.g2.com/compare/sift-s-ai-powered-fraud-decisioning-platform-sift-vs-signifyd)
- [Signifyd vs Fingerprint](https://www.g2.com/compare/fingerprintjs-fingerprint-vs-signifyd)
- [Signifyd vs LastPass](https://www.g2.com/compare/lastpass-vs-signifyd)
- [Signifyd vs 1Password](https://www.g2.com/compare/1password-vs-signifyd)
- [Signifyd vs HAProxy](https://www.g2.com/compare/haproxy-vs-signifyd)
- [Signifyd vs Cloudflare Application Security and Performance](https://www.g2.com/compare/cloudflare-application-security-and-performance-vs-signifyd)
- [Signifyd vs OneLogin](https://www.g2.com/compare/onelogin-vs-signifyd)

  ### 4. [Sift](https://www.g2.com/products/sift-s-ai-powered-fraud-decisioning-platform-sift/reviews)
By Sift's Fraud Prevention Platform
**Average Rating:** 4.6/5
**Total Reviews:** 607
Sift is the leading fraud prevention platform securing digital trust for 700+ global brands.


Categories in common with Castle: [Fraud Detection](https://www.g2.com/categories/fraud-detection), [Risk-Based Authentication (RBA)](https://www.g2.com/categories/risk-based-authentication-rba), [E-commerce Fraud Protection](https://www.g2.com/categories/e-commerce-fraud-protection)

**Compare:** [Castle vs Sift](https://www.g2.com/compare/castle-vs-sift-s-ai-powered-fraud-decisioning-platform-sift)
**Compare Sift with other alternatives:**
- [Sift vs SEON](https://www.g2.com/compare/seon-vs-sift-s-ai-powered-fraud-decisioning-platform-sift)
- [Sift vs Cisco Duo](https://www.g2.com/compare/cisco-duo-vs-sift-s-ai-powered-fraud-decisioning-platform-sift)
- [Sift vs Signifyd](https://www.g2.com/compare/sift-s-ai-powered-fraud-decisioning-platform-sift-vs-signifyd)
- [Sift vs Fingerprint](https://www.g2.com/compare/fingerprintjs-fingerprint-vs-sift-s-ai-powered-fraud-decisioning-platform-sift)
- [Sift vs LastPass](https://www.g2.com/compare/lastpass-vs-sift-s-ai-powered-fraud-decisioning-platform-sift)
- [Sift vs 1Password](https://www.g2.com/compare/1password-vs-sift-s-ai-powered-fraud-decisioning-platform-sift)
- [Sift vs HAProxy](https://www.g2.com/compare/haproxy-vs-sift-s-ai-powered-fraud-decisioning-platform-sift)
- [Sift vs Cloudflare Application Security and Performance](https://www.g2.com/compare/cloudflare-application-security-and-performance-vs-sift-s-ai-powered-fraud-decisioning-platform-sift)
- [Sift vs OneLogin](https://www.g2.com/compare/onelogin-vs-sift-s-ai-powered-fraud-decisioning-platform-sift)

  ### 5. [Fingerprint](https://www.g2.com/products/fingerprintjs-fingerprint/reviews)
By Fingerprint
**Average Rating:** 4.7/5
**Total Reviews:** 363
As opposed to top-down, enterprise-focused fraud prevention platforms, FingerprintJS prevents digital fraud by uniquely and accurately identifying users, and empowering technical teams to use that data in a way that works for their applications.


Categories in common with Castle: [Bot Detection and Mitigation](https://www.g2.com/categories/bot-detection-and-mitigation), [Fraud Detection](https://www.g2.com/categories/fraud-detection), [E-commerce Fraud Protection](https://www.g2.com/categories/e-commerce-fraud-protection)

**Compare:** [Castle vs Fingerprint](https://www.g2.com/compare/castle-vs-fingerprintjs-fingerprint)
**Compare Fingerprint with other alternatives:**
- [Fingerprint vs SEON](https://www.g2.com/compare/fingerprintjs-fingerprint-vs-seon)
- [Fingerprint vs Cisco Duo](https://www.g2.com/compare/cisco-duo-vs-fingerprintjs-fingerprint)
- [Fingerprint vs Signifyd](https://www.g2.com/compare/fingerprintjs-fingerprint-vs-signifyd)
- [Fingerprint vs Sift](https://www.g2.com/compare/fingerprintjs-fingerprint-vs-sift-s-ai-powered-fraud-decisioning-platform-sift)
- [Fingerprint vs LastPass](https://www.g2.com/compare/fingerprintjs-fingerprint-vs-lastpass)
- [Fingerprint vs 1Password](https://www.g2.com/compare/1password-vs-fingerprintjs-fingerprint)
- [Fingerprint vs HAProxy](https://www.g2.com/compare/fingerprintjs-fingerprint-vs-haproxy)
- [Fingerprint vs Cloudflare Application Security and Performance](https://www.g2.com/compare/cloudflare-application-security-and-performance-vs-fingerprintjs-fingerprint)
- [Fingerprint vs OneLogin](https://www.g2.com/compare/fingerprintjs-fingerprint-vs-onelogin)

  ### 6. [LastPass](https://www.g2.com/products/lastpass/reviews)
By LastPass
**Average Rating:** 4.5/5
**Total Reviews:** 2,039
LastPass business solutions help teams & businesses take control of their identity management with password management, single sign-on (SSO), and adaptive multifactor authentication (MFA).


Categories in common with Castle: [Risk-Based Authentication (RBA)](https://www.g2.com/categories/risk-based-authentication-rba)

**Compare:** [Castle vs LastPass](https://www.g2.com/compare/castle-vs-lastpass)
**Compare LastPass with other alternatives:**
- [LastPass vs SEON](https://www.g2.com/compare/lastpass-vs-seon)
- [LastPass vs Cisco Duo](https://www.g2.com/compare/cisco-duo-vs-lastpass)
- [LastPass vs Signifyd](https://www.g2.com/compare/lastpass-vs-signifyd)
- [LastPass vs Sift](https://www.g2.com/compare/lastpass-vs-sift-s-ai-powered-fraud-decisioning-platform-sift)
- [LastPass vs Fingerprint](https://www.g2.com/compare/fingerprintjs-fingerprint-vs-lastpass)
- [LastPass vs 1Password](https://www.g2.com/compare/1password-vs-lastpass)
- [LastPass vs HAProxy](https://www.g2.com/compare/haproxy-vs-lastpass)
- [LastPass vs Cloudflare Application Security and Performance](https://www.g2.com/compare/cloudflare-application-security-and-performance-vs-lastpass)
- [LastPass vs OneLogin](https://www.g2.com/compare/lastpass-vs-onelogin)

  ### 7. [1Password](https://www.g2.com/products/1password/reviews)
By 1Password
**Average Rating:** 4.6/5
**Total Reviews:** 1,785
1Password remembers your passwords for you — and helps you make them stronger. All your secrets are secure and always available, safe behind the one password that only you know.


Categories in common with Castle: [Risk-Based Authentication (RBA)](https://www.g2.com/categories/risk-based-authentication-rba)

**Compare:** [Castle vs 1Password](https://www.g2.com/compare/1password-vs-castle)
**Compare 1Password with other alternatives:**
- [1Password vs SEON](https://www.g2.com/compare/1password-vs-seon)
- [1Password vs Cisco Duo](https://www.g2.com/compare/1password-vs-cisco-duo)
- [1Password vs Signifyd](https://www.g2.com/compare/1password-vs-signifyd)
- [1Password vs Sift](https://www.g2.com/compare/1password-vs-sift-s-ai-powered-fraud-decisioning-platform-sift)
- [1Password vs Fingerprint](https://www.g2.com/compare/1password-vs-fingerprintjs-fingerprint)
- [1Password vs LastPass](https://www.g2.com/compare/1password-vs-lastpass)
- [1Password vs HAProxy](https://www.g2.com/compare/1password-vs-haproxy)
- [1Password vs Cloudflare Application Security and Performance](https://www.g2.com/compare/1password-vs-cloudflare-application-security-and-performance)
- [1Password vs OneLogin](https://www.g2.com/compare/1password-vs-onelogin)

  ### 8. [HAProxy](https://www.g2.com/products/haproxy/reviews)
By HAProxy
**Average Rating:** 4.7/5
**Total Reviews:** 890
HAProxy is an open-source software load balancer and reverse proxy for TCP, QUIC, and HTTP-based applications. It provides high availability, load balancing, and best-in-class SSL processing. HAProxy One is an application delivery and security platform that combines the HAProxy core with enterprise-grade security layers, management and orchestration, cloud-native integration, and more. Platform components: HAProxy Enterprise: a flexible data plane layer for TCP, UDP, QUIC, and HTTP-based applications that provides high-performance load balancing, high availability, an API/AI gateway, container networking, SSL processing, DDoS protection, bot detection and mitigation, global rate limiting, and a web application firewall (WAF). HAProxy Fusion: a scalable control plane that provides full-lifecycle management, observability, and automation of multi-cluster, multi-cloud, and multi-team HAProxy Enterprise deployments, with infrastructure integration for AWS, Kubernetes, Consul, and Prometheus. HAProxy Edge: a globally distributed application delivery network that provides fully managed application delivery and security services, a secure partition between external traffic and origin networks, and threat intelligence enhanced by machine learning that powers the security layers in HAProxy Fusion and HAProxy Enterprise. Learn more at HAProxy.com.


Categories in common with Castle: [Bot Detection and Mitigation](https://www.g2.com/categories/bot-detection-and-mitigation)

**Compare:** [Castle vs HAProxy](https://www.g2.com/compare/castle-vs-haproxy)
**Compare HAProxy with other alternatives:**
- [HAProxy vs SEON](https://www.g2.com/compare/haproxy-vs-seon)
- [HAProxy vs Cisco Duo](https://www.g2.com/compare/cisco-duo-vs-haproxy)
- [HAProxy vs Signifyd](https://www.g2.com/compare/haproxy-vs-signifyd)
- [HAProxy vs Sift](https://www.g2.com/compare/haproxy-vs-sift-s-ai-powered-fraud-decisioning-platform-sift)
- [HAProxy vs Fingerprint](https://www.g2.com/compare/fingerprintjs-fingerprint-vs-haproxy)
- [HAProxy vs LastPass](https://www.g2.com/compare/haproxy-vs-lastpass)
- [HAProxy vs 1Password](https://www.g2.com/compare/1password-vs-haproxy)
- [HAProxy vs Cloudflare Application Security and Performance](https://www.g2.com/compare/cloudflare-application-security-and-performance-vs-haproxy)
- [HAProxy vs OneLogin](https://www.g2.com/compare/haproxy-vs-onelogin)

  ### 9. [Cloudflare Application Security and Performance](https://www.g2.com/products/cloudflare-application-security-and-performance/reviews)
By Cloudflare, Inc.
**Average Rating:** 4.5/5
**Total Reviews:** 599
Cloudflare Application Security and Performance solutions provide performance, reliability, and security for all of your web applications and APIs, wherever they are hosted and wherever your users are.


Categories in common with Castle: [Bot Detection and Mitigation](https://www.g2.com/categories/bot-detection-and-mitigation)

**Compare:** [Castle vs Cloudflare Application Security and Performance](https://www.g2.com/compare/castle-vs-cloudflare-application-security-and-performance)
**Compare Cloudflare Application Security and Performance with other alternatives:**
- [Cloudflare Application Security and Performance vs SEON](https://www.g2.com/compare/cloudflare-application-security-and-performance-vs-seon)
- [Cloudflare Application Security and Performance vs Cisco Duo](https://www.g2.com/compare/cisco-duo-vs-cloudflare-application-security-and-performance)
- [Cloudflare Application Security and Performance vs Signifyd](https://www.g2.com/compare/cloudflare-application-security-and-performance-vs-signifyd)
- [Cloudflare Application Security and Performance vs Sift](https://www.g2.com/compare/cloudflare-application-security-and-performance-vs-sift-s-ai-powered-fraud-decisioning-platform-sift)
- [Cloudflare Application Security and Performance vs Fingerprint](https://www.g2.com/compare/cloudflare-application-security-and-performance-vs-fingerprintjs-fingerprint)
- [Cloudflare Application Security and Performance vs LastPass](https://www.g2.com/compare/cloudflare-application-security-and-performance-vs-lastpass)
- [Cloudflare Application Security and Performance vs 1Password](https://www.g2.com/compare/1password-vs-cloudflare-application-security-and-performance)
- [Cloudflare Application Security and Performance vs HAProxy](https://www.g2.com/compare/cloudflare-application-security-and-performance-vs-haproxy)
- [Cloudflare Application Security and Performance vs OneLogin](https://www.g2.com/compare/cloudflare-application-security-and-performance-vs-onelogin)

  ### 10. [OneLogin](https://www.g2.com/products/onelogin/reviews)
By One Identity
**Average Rating:** 4.4/5
**Total Reviews:** 290
Extend enterprise security & compliance to all public and private cloud apps with secure single sign-on (SSO), multi-factor authentication & user provisioning.


Categories in common with Castle: [Risk-Based Authentication (RBA)](https://www.g2.com/categories/risk-based-authentication-rba)

**Compare:** [Castle vs OneLogin](https://www.g2.com/compare/castle-vs-onelogin)
**Compare OneLogin with other alternatives:**
- [OneLogin vs SEON](https://www.g2.com/compare/onelogin-vs-seon)
- [OneLogin vs Cisco Duo](https://www.g2.com/compare/cisco-duo-vs-onelogin)
- [OneLogin vs Signifyd](https://www.g2.com/compare/onelogin-vs-signifyd)
- [OneLogin vs Sift](https://www.g2.com/compare/onelogin-vs-sift-s-ai-powered-fraud-decisioning-platform-sift)
- [OneLogin vs Fingerprint](https://www.g2.com/compare/fingerprintjs-fingerprint-vs-onelogin)
- [OneLogin vs LastPass](https://www.g2.com/compare/lastpass-vs-onelogin)
- [OneLogin vs 1Password](https://www.g2.com/compare/1password-vs-onelogin)
- [OneLogin vs HAProxy](https://www.g2.com/compare/haproxy-vs-onelogin)
- [OneLogin vs Cloudflare Application Security and Performance](https://www.g2.com/compare/cloudflare-application-security-and-performance-vs-onelogin)


## Explore Articles
- [Top AI-powered business operations automation tools](https://www.g2.com/discussions/what-are-the-top-powered-business-operation-automation-tools)
- [What is the top-rated WhatsApp marketing platform for e-commerce brands?](https://www.g2.com/discussions/what-is-the-top-rated-whatsapp-marketing-platform-for-e-commerce-brands)
- [Easy-to-use board meeting software recommendation](https://www.g2.com/discussions/easy-to-use-board-meeting-software-recommendation)
- [Best-rated employee review platform for software industry](https://www.g2.com/discussions/best-rated-employee-review-platform-for-the-software-industry-what-s-your-team-using)
- [Which payroll software has the highest reviews](https://www.g2.com/discussions/which-payroll-software-has-the-highest-reviews)
- [What platform integrates scanning with patch management systems?](https://www.g2.com/discussions/what-platform-integrates-scanning-with-patch-management-systems)

## Spotlight Categories
- [Marketing Analytics Tools](https://www.g2.com/categories/marketing-analytics)
- [Online Reputation Management Software](https://www.g2.com/categories/online-reputation-management)
- [Accounting Software](https://www.g2.com/categories/accounting)