About Syrenis
Syrenis is a UK-based consent and preference management software specialist serving large, regulated enterprises. Founded in 2000 and headquartered in Warrington, England, with additional offices in Austin and Atlanta, the company develops the platform formerly marketed as Cassie and now branded Syrenis. Its software helps organizations collect, store, and enforce customer consent and communication preferences at scale across web, mobile, and downstream data systems under GDPR, CCPA and CPRA, and other privacy regimes. Privately held, Syrenis serves FTSE 100 and Fortune 500 customers, including LexisNexis.
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Info last updated on August 12, 2026