MARASA Rent Anonymizer

Commercial real estate teams routinely share rent roll files with technology vendors, lenders, brokers, and joint-venture partners to align on data formats, underwriting assumptions, or system integrations. Every time they do, they expose sensitive tenant information: names, lease terms, rent figures, and contact details.

MARASA Rent Anonymizer eliminates that exposure. It is an Excel add-in built for asset managers, property managers, and CRE analysts who need to share rent roll structure without sharing tenant data. The tool detects every column in your rent roll, identifies the data type in each column, and replaces real values with realistic synthetic equivalents, preserving the formatting, structure, and layout of the original file.

Key features

• One-click full anonymization: Automatically detects all columns and their data types (tenant names, rent amounts, lease dates, suite numbers, and more) and anonymizes the entire file instantly.
• Manual column control: Review auto-detected columns, choose the anonymization type applied to each one, or mark specific columns to leave untouched.
• Format integrity preserved: Output files retain the exact structure of the original, so recipients see a realistic, usable rent roll without any real tenant data.

Who it is for

Asset managers, property managers, and CRE analysts at real estate investment firms, REITs, private equity real estate funds, and property management companies who work with rent rolls regularly and need to share file formats externally.

Getting started

Open the add-in from the Excel ribbon. On the start screen, you will see a brief overview of what the tool does before any sign-in is required. From there, load your rent roll, choose full or manual anonymization, and export the sanitized file. A MARASA account is required to use the add-in. Signing up gives you access to the full anonymization engine and column detection features.