# Top 10 Castle Alternatives & Competitors **Average Rating:** 3.7/5 **Total Number of Reviews:** 3 Castle is not the only option for E-commerce Fraud Protection Software. Explore other competing options and alternatives. E-commerce Fraud Protection Software is a widely used technology, and many people are seeking easy to use, user friendly software solutions with real-time monitoring, bot mitigation, and intelligence reporting. 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) - [Harness Platform](https://www.g2.com/products/harness-platform/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:** 390 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 Harness Platform](https://www.g2.com/compare/harness-platform-vs-seon) ### 2. [Cisco Duo](https://www.g2.com/products/cisco-duo/reviews) By Cisco **Average Rating:** 4.5/5 **Total Reviews:** 518 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 Harness Platform](https://www.g2.com/compare/cisco-duo-vs-harness-platform) ### 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 Harness Platform](https://www.g2.com/compare/harness-platform-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:** 615 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 Harness Platform](https://www.g2.com/compare/harness-platform-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:** 430 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 Harness Platform](https://www.g2.com/compare/fingerprintjs-fingerprint-vs-harness-platform) ### 6. [LastPass](https://www.g2.com/products/lastpass/reviews) By LastPass **Average Rating:** 4.5/5 **Total Reviews:** 2,075 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 Harness Platform](https://www.g2.com/compare/harness-platform-vs-lastpass) ### 7. [1Password](https://www.g2.com/products/1password/reviews) By 1Password **Average Rating:** 4.6/5 **Total Reviews:** 1,809 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 Harness Platform](https://www.g2.com/compare/1password-vs-harness-platform) ### 8. [HAProxy](https://www.g2.com/products/haproxy/reviews) By HAProxy **Average Rating:** 4.7/5 **Total Reviews:** 905 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 Harness Platform](https://www.g2.com/compare/haproxy-vs-harness-platform) ### 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:** 673 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 Harness Platform](https://www.g2.com/compare/cloudflare-application-security-and-performance-vs-harness-platform) ### 10. [Harness Platform](https://www.g2.com/products/harness-platform/reviews) By Harness **Average Rating:** 4.6/5 **Total Reviews:** 306 Harness is the first Continuous Delivery-as-a-Service platform that uses Machine Learning to simplify the entire process of delivering code from artifact into production – quickly, safely, securely, and repeatably. Categories in common with Castle: [Bot Detection and Mitigation](https://www.g2.com/categories/bot-detection-and-mitigation) **Compare:** [Castle vs Harness Platform](https://www.g2.com/compare/castle-vs-harness-platform) **Compare Harness Platform with other alternatives:** - [Harness Platform vs SEON](https://www.g2.com/compare/harness-platform-vs-seon) - [Harness Platform vs Cisco Duo](https://www.g2.com/compare/cisco-duo-vs-harness-platform) - [Harness Platform vs Signifyd](https://www.g2.com/compare/harness-platform-vs-signifyd) - [Harness Platform vs Sift](https://www.g2.com/compare/harness-platform-vs-sift-s-ai-powered-fraud-decisioning-platform-sift) - [Harness Platform vs Fingerprint](https://www.g2.com/compare/fingerprintjs-fingerprint-vs-harness-platform) - [Harness Platform vs LastPass](https://www.g2.com/compare/harness-platform-vs-lastpass) - [Harness Platform vs 1Password](https://www.g2.com/compare/1password-vs-harness-platform) - [Harness Platform vs HAProxy](https://www.g2.com/compare/haproxy-vs-harness-platform) - [Harness Platform vs Cloudflare Application Security and Performance](https://www.g2.com/compare/cloudflare-application-security-and-performance-vs-harness-platform) --- ## Castle Alternatives FAQs ### How does Castle compare to SEON? According to G2, [Castle](https://www.g2.com/products/castle/reviews) has an average rating of 3.7/5 from 3 reviews, whereas [SEON](https://www.g2.com/products/seon/reviews) holds a significantly higher average rating of 4.6/5 based on 381 reviews. SEON leads Castle across multiple reviewer-rated dimensions with scores of 9.1 in Meeting Requirements and Usability, 9.2 in Ease of Admin, 9.3 in Support, and 9.4 in Ease of Doing Business, surpassing Castle by notable margins. User feedback highlights SEON's ease of use with 25 mentions, strong fraud prevention (24 mentions), intuitive user interface (19 mentions), and excellent customer support (17 mentions). In contrast, Castle's pros include protection, fraud scoring, and bot detection, but users report issues such as inaccuracy, communication challenges, false positives, and ineffective blocking. SEON's platform is praised for its customizable rules, detailed fraud detection capabilities, and real-time monitoring, while Castle's limited review volume and lower satisfaction scores reflect less favorable user experiences. Overall, SEON demonstrates superior user satisfaction, feature richness, and operational efficiency compared to Castle. ### What are the best alternatives to Castle? The best alternatives to Castle are SEON (4.6/5 with 381 reviews), Signifyd (4.6/5 with 352 reviews), Sift (4.6/5 with 610 reviews), and Cisco Duo (4.5/5 with 516 reviews), all rated significantly higher than Castle's 3.7/5 from 3 reviews. ### What features do alternatives offer that Castle does not? Castle lacks advanced customization and detailed data enrichment features that alternatives like SEON provide, including over 900 real-time, first-party data signals and flexible rule engines. ### Which E-commerce Fraud Protection tools do reviewers recommend instead of Castle? Reviewers recommend SEON for its extensive data coverage, customizable rules, and excellent customer support, making it ideal for fast-moving fraud teams. Signifyd is favored for its 100% financial chargeback guarantee and automation that reduces manual reviews. Sift is praised for its AI-powered real-time fraud detection, user-friendly interface, and comprehensive analytics. Cisco Duo is recommended for secure, user-friendly multi-factor authentication with seamless integrations and strong device visibility, enhancing access security beyond fraud protection. ### Why do users choose SEON over Castle? Users choose [SEON](https://www.g2.com/products/seon/reviews) over Castle primarily due to its higher ease of use and extensive customization capabilities, as reflected in 25 mentions of ease of use and 13 mentions of rule customization. SEON's intuitive user interface and seamless integration with existing systems simplify fraud detection workflows, supported by 17 mentions of excellent customer support that ensures rapid issue resolution. The platform's comprehensive fraud prevention features, including real-time monitoring and detailed data enrichment, enable users to reduce manual reviews and improve detection accuracy, with 24 mentions praising its fraud prevention effectiveness. SEON's flexibility in tailoring rules to specific business needs and its strong support infrastructure contribute to a smoother implementation and administration experience, as evidenced by its 9.2 Ease of Admin and 9.3 Support scores. 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