GatekeeperZero is a society management platform for housing societies in India. It provides a single system for managing visitor security, billing, helpdesk requests, amenity bookings, and staff coordination. The platform is priced at 9 rupees per flat per month, billed annually, with no setup fees and no lock-in beyond the paid year. The software uses a double-entry bookkeeping system to record financial transactions, including invoices, UPI collections, vendor payments, and GST remittances. Committees can publish read-only financial statements, such as a Balance Sheet and Income and Expenditure report, through a public link that does not require member logins. The platform provides separate mobile applications for residents, guards, and managers, in addition to a web-based admin dashboard. The resident app includes 236 features, the guard app includes 105 features, and the web dashboard includes 134 features. The platform does not contain advertising SDKs or an advertiser marketplace. The mobile applications are available on the App Store and Google Play. Typical use cases include visitor logging, GST-compliant invoice generation, maintenance complaint tracking, and amenity booking management. Data migration from MyGate and NoBrokerHood is provided at no additional cost. The implementation process involves a committee walkthrough, data transfer, and application activation, with most societies going live within a week.