Tool Overview:
cassie

About Cassie

Cassie is a consent and preference management platform (CMP) developed by Syrenis, a UK-based company founded in 2000. The platform serves as a centralized solution for organizations to collect, manage, and enforce customer consent preferences across multiple systems and domains. Recognized in the 2024 Gartner Market Guide for Consent Management, Cassie specializes in handling high-volume consent transactions for enterprise organizations.

What does Cassie do?

The platform functions as a central hub for consent management through four primary service categories: collection, matching, harmonization, and preference honoring. Its API-centric architecture enables integration with over 350 pre-built endpoints connecting to common business systems including CRMs, marketing platforms, and e-commerce solutions. The system can process up to 50,000 transactions per second and includes features for bulk data loading, web widgets, and cookie management.

The platform's cookie management capabilities address privacy browser challenges through HTTP unique IDs, which helps maintain user identification even when cookies are deleted. Cassie supports Global Privacy Control (GPC) settings and includes a built-in scanner for auditing cookies and concealed trackers. The system enables organizations to create multiple cookie banner variations to address different regulatory requirements while maintaining compliance.

What makes Cassie different?

A key technical differentiator is Cassie's Identity Service, which helps organizations identify visitors even when cookies are removed by privacy features like Intelligent Tracking Prevention. The platform is the only consent management solution that enables sharing of consent across multiple brand domains, which can reduce consent fatigue for users interacting with multiple properties owned by the same organization.

The platform's architecture supports unlimited key-value pairs of additional information against consents, enabling granular consent management. This flexibility allows organizations to customize their consent collection and management processes while maintaining compliance with various privacy regulations including GDPR, CCPA, and VCDPA. Cassie maintains SOC 2 Type II certification and Cyber Essentials Plus status, demonstrating its commitment to security standards.

Use cases and industries

Cassie primarily serves enterprise organizations dealing with complex, high-volume data scenarios. The platform is particularly relevant for businesses operating in regulated industries or those managing customer data across multiple jurisdictions. Common use cases include marketing teams seeking to maintain personalized communication while respecting privacy preferences, car manufacturers protecting vehicle data, and organizations requiring seamless connected experiences across multiple domains.

For marketing applications, the platform enables preference collection throughout the customer journey while synchronizing this data with CRM and marketing automation tools. In the automotive sector, Cassie helps manufacturers manage consent for vehicle data while maintaining compliance with various privacy regulations. The platform's ability to handle high transaction volumes makes it suitable for organizations managing large customer databases, with some clients reportedly managing up to 400 million data subjects.