Retainer

About

Retainer is a production-ready B2B SaaS for creative, digital, development, and professional service agencies that manage recurring client retainers and hourly work.It replaces spreadsheets and manual tracking with a centralized workspace for clients, retainers, billing periods, time entries, rollover balances, and usage tracking.Key features include:Client and retainer managementMonthly billing period trackingNone, full/uncapped, capped, and expiring rollover rulesAutomatic remaining and overage hour calculationsHistorical ledger continuity across billing periodsAutomated audit and integrity checksClosed-period immutability for historical recordsMulti-tenant organization architecturePlatform administrator consoleStripe-ready subscription architectureSupabase/PostgreSQL production database supportComprehensive automated test suiteThe application is currently pre-revenue and is being sold as a complete software asset. The buyer receives the source code, application architecture, database migrations, documentation, and the ability to deploy the product under their own infrastructure, domain, database, and payment accounts.Live demo: https://retainer.ai.studioThe product is designed as a transferable foundation for a buyer who wants to launch, customize, brand, and monetize a focused B2B SaaS for agencies.