Cassandra vs rex by AureliaX

Cassandra is a web-based marketing measurement platform for teams deciding how to invest in growth. It combines marketing mix modeling with incrementality testing, including instant incrementality and performance incrementality reporting. Its models examine how paid media, organic activity, and offline or brand campaigns contribute to business outcomes. Teams can use budget scenario planning and forecasting before committing spend, as well as ROI reporting. Listed data sources include advertising platforms such as Google Ads, Meta Ads, and TikTok Ads, alongside commerce, email, and CRM services including Shopify, Klaviyo, and Salesforce. Scheduled files can bring in data from sources without an API, and custom connectors can be built for a model. Essentials starts at €2,700/mo and includes up to three MMM models and five incrementality experiments per year; it has a six-month minimum commitment. Complete and Scale also require six months, while Enterprise pricing is custom. A 14-day trial is available without a credit card. Cassandra is based in Milan and says it achieved SOC 2 compliance in 2024.

rex by AureliaX is a Marketing Mix Modelling platform for measuring and improving marketing performance across online and offline channels. Bayesian machine-learning models test starting assumptions against two to three years of historical data. Response curves and scenario planning support recommended budget allocations, while the platform provides budget planning, forecasting and ROI reporting. Users can inspect model components, confidence intervals, initial assumptions and how incoming data changed them. rex connects to more than 500 marketing platforms, including Google Ads, Meta, TikTok, Snapchat, LinkedIn and Pinterest. For offline channels without APIs, templates accept weekly or monthly spend and reach figures. Recommendations are updated monthly and reviewed by the maker’s team. Onboarding typically includes two or three sessions and a monthly review. The service is available through web and API access. Its maker describes it as GDPR-compliant and privacy-first and says it does not rely on user-level cookies. Pricing is tailored to business needs, users and modules, with pilot programs for strategic partners.