Castle alternatives
8 products compared · Updated November 4, 2026
The short answer
For founders and operators comparing Castle alternatives, the three strongest options are Sift for automated case review and attack detection across the customer journey, Fingerprint for high-accuracy device fingerprinting with transparent per-API pricing, and FraudLabs Pro for e-commerce payment fraud screening with a free tier and ready-made plugins. Sift suits fraud and risk teams at digital businesses, Fingerprint suits high-volume traffic needing reliable visitor identification, and FraudLabs Pro suits e-commerce stores needing straightforward order screening.
Your shortlist, at a glance
Read the comparisons ↓
SiftNot publishedFraud, risk, and payments teams at digital businesses that want automated case review and attack detection across the entire customer journey.- AArkose LabsCustom quoteEnterprises that need to see and control AI agents like Muse on their customer journeys, with policy per agent and step.
- DDataDomeNot publishedTeams looking for DISC personality assessments and executive training, not fraud prevention.
- FFingerprintFrom $99/mo + $4/1k caTeams that need reliable visitor identification across web and mobile to stop fraud and bot attacks, especially those with high-volume traffic.
- IIPQualityScoreCustom quoteTeams that need flexible, per-request fraud scoring across IP, email, phone, and device signals, with easy integration into existing CRM or security workflows.
- MMaxMindNot publishedTeams that need IP geolocation and proxy detection as a data feed, or want a simple per-query fraud score without a full SDK integration.
- LLexisNexisNot publishedLarge enterprises and government agencies that need data analytics for compliance, fraud detection, and risk decisioning across multiple domains.
- FFraudLabs ProFrom $29.95/moE-commerce businesses that need payment fraud screening with customizable rules and ready-made platform integrations.
About Castle and its alternatives
Castle is a security and fraud prevention platform that blocks bots and stops account abuse at scale. It offers a complete suite of SDKs and APIs for IP intelligence, device fingerprinting, bot detection, AI scoring, and behavioral analysis, with pricing starting at a free tier and scaling to enterprise plans.
When comparing alternatives, weigh pricing structure (per-API-call vs. monthly tiers), regional coverage, integrations with your existing stack, support options, and contract terms. Some tools focus on specific fraud types like payment fraud or AI agents, so match the alternative to your primary use case.
Explore the alternatives
- Not published
1.Sift
Best for: Fraud, risk, and payments teams at digital businesses that want automated case review and attack detection across the entire customer journey.
- Pricing
- Not published
- Category
- Security & Privacy
Sift is a fraud prevention platform that uses AI to detect payment fraud, account takeover, and fake accounts in real time. It also offers AI agents that automatically review cases and investigate users. Choose Sift if you need a broader fraud platform with automated case management and attack detection, rather than Castle's API-focused bot and abuse prevention toolkit.
Where it is strong
- AI agents automatically review cases and investigate users
- Attack Detection Agent cuts response time from days to minutes
- Used by 700+ brands, including Patreon and ChowNow
Where it falls short
- Pricing is not public, likely enterprise-oriented
- May be more complex than Castle for simple bot blocking
- Pricing:
- Pricing is not published on the site.
- ACustom quote
2.Arkose Labs
Best for: Enterprises that need to see and control AI agents like Muse on their customer journeys, with policy per agent and step.
- Pricing
- Custom quote
- Category
- Other
Arkose Labs focuses on detecting and orchestrating AI agents, including those that change their disguises, which Castle does not emphasize. It is a good fit if your main concern is managing AI agent traffic on login, signup, and checkout flows, rather than general bot and fraud prevention.
Where it is strong
- Detects AI agents even after they change builds or networks.
- Lets you set allow, monitor, or block policies per agent and step.
- Used by large brands like Microsoft, Roblox, Adobe, and Expedia.
Where it falls short
- Pricing is not public, likely enterprise-only.
- Focuses on AI agents, so may not cover all fraud types Castle handles.
- Pricing:
- Pricing is not published on the site.
- DNot published
3.DataDome
Best for: Teams looking for DISC personality assessments and executive training, not fraud prevention.
- Pricing
- Not published
- Category
- Other
DataDome's site is about DISC training and business assessments, not bot or fraud protection. It does not offer the IP intelligence, device fingerprinting, or bot detection that Castle provides. Choose DataDome only if you need workforce assessment tools, not security.
Where it is strong
- Offers DISC training and certification programs.
- Provides business assessment tools.
- Focused on organizational development.
Where it falls short
- No bot detection or fraud prevention features.
- Not a security or abuse monitoring product.
- Pricing:
- Pricing is not published on the site.
- FFrom $99/mo + $4/1k ca
4.Fingerprint
Best for: Teams that need reliable visitor identification across web and mobile to stop fraud and bot attacks, especially those with high-volume traffic.
- Pricing
- From $99/mo + $4/1k ca
- Category
- Other
Fingerprint is a device intelligence platform that identifies every visitor to your web or mobile app, even when they use VPNs, incognito mode, or tampered devices. It's a good choice if you need high-accuracy visitor identification for fraud prevention and want to reduce friction for trusted users. You'd choose it over Castle when your primary need is device fingerprinting and bot detection with a straightforward per-API-call pricing model.
Where it is strong
- Identifies visitors even in incognito or with VPNs, with high accuracy.
- Includes Smart Signals for 100+ risk attributes, including AI agent detection.
- Offers a free tier with 1,000 API calls per month and a 14-day Pro Plus trial.
Where it falls short
- Pricing is based on API calls, which can get expensive at scale.
- Enterprise features like SLA and proxy integrations are only on the Enterprise plan.
- Pricing:
- Pricing starts at $99 per month for Pro Plus, which includes 20,000 API requests for web and iOS and 500,000 for Android. Additional requests are $4 per 1,000.
- Switching from Castle:
- Moving from Castle to Fingerprint means replacing your device fingerprinting and bot detection with Fingerprint's API, but you'll need to rebuild any custom rules or case management you had in Castle.
- ICustom quote
5.IPQualityScore
Best for: Teams that need flexible, per-request fraud scoring across IP, email, phone, and device signals, with easy integration into existing CRM or security workflows.
- Pricing
- Custom quote
- Category
- Other
IPQualityScore is a fraud detection and threat intelligence platform that provides risk scores for IPs, emails, phones, and devices, plus bot detection and data validation. You would choose it over Castle if you need a broad set of standalone risk lookups and integrations with CRMs and SIEM tools, rather than Castle's full-stack user monitoring and rules engine.
Where it is strong
- Covers IP, email, phone, and device risk in one API
- Integrates with Hubspot, Salesforce, Splunk, and more
- Free trial with 1,000 lookups to test before buying
Where it falls short
- No published pricing, so budgeting is harder
- No built-in case management or rules engine like Castle
- Pricing:
- Pricing is not published on the site. You must contact IPQS for a quote or start a free trial with 1,000 lookups.
- Switching from Castle:
- Moving from Castle means replacing its SDKs and dashboard with IPQS's API-based lookups and third-party integrations, which may require reworking your fraud workflow.
- MNot published
6.MaxMind
Best for: Teams that need IP geolocation and proxy detection as a data feed, or want a simple per-query fraud score without a full SDK integration.
- Pricing
- Not published
- Category
- Other
MaxMind provides IP geolocation, proxy detection, and fraud scoring as separate data products, with per-query pricing and no minimums. Choose it over Castle if you need raw IP intelligence to enrich your own systems or want a lightweight fraud risk score without a full SDK integration.
Where it is strong
- Per-query pricing with no monthly minimum
- Covers 99.9999% of IP addresses in use
- Offers both IP intelligence and fraud detection
Where it falls short
- No device fingerprinting or behavioral analytics
- No case management or rules engine for real-time decisions
- Pricing:
- Pricing is not published on the site.
- LNot published
7.LexisNexis
Best for: Large enterprises and government agencies that need data analytics for compliance, fraud detection, and risk decisioning across multiple domains.
- Pricing
- Not published
- Category
- Other
LexisNexis is a broad data and analytics provider covering legal, risk, and compliance, not a dedicated bot and fraud prevention tool like Castle. You would choose it if you need a large enterprise vendor with deep data sources for risk decisioning across multiple business areas, rather than a focused anti-abuse API.
Where it is strong
- Broad data sources across legal, business, and risk domains.
- Established enterprise vendor with government and corporate clients.
- Offers identity, fraud, and compliance analytics in one place.
Where it falls short
- Not a specialized bot detection or account abuse tool.
- No self-serve pricing or API usage tiers like Castle's plans.
- Pricing:
- Pricing is not published on the site.
- FFrom $29.95/mo
8.FraudLabs Pro
Best for: E-commerce businesses that need payment fraud screening with customizable rules and ready-made platform integrations.
- Pricing
- From $29.95/mo
- Category
- Other
FraudLabs Pro screens orders for payment fraud using IP geolocation, email, billing/shipping info, and more. It's a good fit if you run an e-commerce store and want a straightforward, rules-based fraud check with ready-made plugins, rather than Castle's broader bot and account abuse platform.
Where it is strong
- Free plan with 500 queries per month for small startups.
- Over 20 ready plugins for major e-commerce platforms.
- Customizable validation rules and blacklists to fit your business.
Where it falls short
- Focuses on payment fraud, not bot detection or device fingerprinting like Castle.
- Higher tiers needed for advanced features like ATO prevention and anomaly detection.
- Pricing:
- Pricing starts at $29.95 per month for 1,500 queries, with a free Micro plan for up to 500 queries per month.
- Switching from Castle:
- Moving from Castle means replacing bot and device intelligence with FraudLabs Pro's order-focused validation, so you'd need to adjust your fraud workflows and possibly add separate bot protection.
See more comparisons in Security & Privacy alternatives.
FAQ
Questions about Castle alternatives
What are the main differences between Castle and its alternatives?
Castle is a full-stack bot and abuse prevention platform with SDKs, APIs, and a rules engine. Alternatives vary: Sift offers broader fraud prevention with automated case management, Fingerprint focuses on device fingerprinting with per-API pricing, and FraudLabs Pro specializes in e-commerce payment fraud screening.
Which alternative is best for e-commerce businesses?
FraudLabs Pro is the strongest fit for e-commerce, with payment fraud screening, customizable rules, and over 20 ready plugins for major platforms. It also offers a free plan with 500 queries per month, making it accessible for small startups.
Are there alternatives with transparent pricing?
Fingerprint publishes pricing starting at $99 per month for 20,000 API requests, with a free tier and 14-day trial. FraudLabs Pro starts at $29.95 per month for 1,500 queries, with a free Micro plan. Other tools like Sift and LexisNexis do not publish pricing.
Which alternative is best for detecting AI agents?
Arkose Labs specializes in detecting and orchestrating AI agents, even those that change disguises, with policies per agent and step. Fingerprint also includes AI agent detection as part of its Smart Signals, but Arkose Labs is more focused on this area.
Do any alternatives offer free trials or plans?
Yes, Fingerprint offers a free tier with 1,000 API calls per month and a 14-day Pro Plus trial. FraudLabs Pro has a free Micro plan for up to 500 queries per month. IPQualityScore provides a free trial with 1,000 lookups.
Last updated November 4, 2026.