Etropo Budget Buddy vs rex by AureliaX

Etropo Budget Buddy is marketing budgeting software for CMOs and their teams, available on the web and through an API. It helps teams build budgets, examine spending, follow variance, and coordinate work. Users can work with Budget Buddy through conversation to create budget items, plan budgets, analyze spend, and sync actuals. Teams can compare budget versions and choose an active one while sharing actuals, categories, and permissions across versions. Category-level access controls and threaded comments support work on individual budget lines. Listed integrations include advertising platforms, Google Sheets, Slack, Microsoft Teams, CRM tools, and AI assistants. Connected ad-account spending syncs weekly after accounts are mapped to budget lines. Budget Buddy actions are permission-checked and logged, and changes require user confirmation. Plans start at $89 a month for Essential, with five team members, up to 15 line items, and up to three currencies. Pro costs $139 a month. A 14-day trial requires no credit card and includes all integrations.

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.