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Castle

Castle

Castle prevents account abuse with cybersecurity APIs and SDKs

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Recommended for

    • Solo / Indie
    • Idea-Stage
    • Pre-Seed
    • Seed
    • Series A
    • Scaleup
    • Late-Stage
    • Public / Enterprise

SSIE

Stage Fit Recommendations

Following data shows why Castle is recommended for listed teams. The Fit Score represents the percentage fit of Castle to each company stages, as calculated by the SSIE.

Stage

Fit Score

Fit Reasons

  • Solo / Indie

    $0–$2,000 MRR

    60
    • Entry pricing sized for this stage
    • Free tier available, no upfront cost
    • Documented REST API for integration
    • Multiple support channels (chat, email)
  • Idea-Stage

    $0

    61
    • Pre-built third-party integrations
  • Pre-Seed

    $0–$10k MRR

    66
    • GDPR - baseline compliance certification
    • Multi-factor authentication (MFA) enforcement
    • Automated data backup with retention policies
    • Documented disaster recovery procedures
  • Seed

    $10k–$100k MRR

    66
    • SOC 2 - core enterprise certification
    • Single sign-on (SSO) via SAML 2.0
    • Published uptime SLA with availability guarantees
    • Documented incident response process
    • Dedicated enterprise plan with custom pricing
  • Series A

    $100k–$500k MRR

    62
    • SOC 2 - core enterprise certification
  • Scaleup

    $500k–$2M+ MRR

    59
    • SOC 2 - core enterprise certification
  • Late-Stage

    $2M+ MRR

    57
    • SOC 2 - core enterprise certification
  • Public / Enterprise

    $100M+ ARR

    57
    • SOC 2 - core enterprise certification
Castle

Castle is a security and compliance solution that offers a suite of APIs and SDKs to monitor user behavior, block malicious bots, and prevent in-app fraud. By integrating Castle into your application, you can leverage its freemium model to stop account abuse and ensure enterprise-grade cybersecurity without added friction. The platform seamlessly connects with Cloudflare or custom edge stacks, providing flexible deployment options. With various plans available, including a free plan and custom enterprise solutions, Castle caters to diverse business needs, prioritizing dedicated support and higher rate limits for its pro and enterprise users. By utilizing Castle's cybersecurity capabilities, businesses can effectively mitigate risks associated with account takeover and maintain a secure user environment.

Submitted By

Added On

Jul 24, 2026

Status

Unclaimed

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