PayChaser

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PayChaser is a full-stack invoice collection and payment follow-up SaaS built for small contractors, tradespeople and service businesses that want to recover unpaid invoices without manually chasing customers.It is not an accounting or invoicing replacement. PayChaser takes existing invoice records and turns collections into a structured workflow: tracking overdue payments, running configurable follow-up sequences, sending reminder emails, monitoring promises to pay and showing businesses where their recoverable cash is.WHAT'S BUILT & VERIFIED• “Cash Rescue” dashboard showing outstanding, overdue, recovered and at-risk amounts• Customer management with invoice and payment history• Invoice and collections management• Manual invoice creation and editing• CSV invoice import• Overdue invoice tracking• Configurable automated collection sequences• Follow-up stages based on due dates and days overdue• Professional reminder email templates• Transactional email delivery through Resend• Test-reminder functionality for email verification• Payment Behavior Score for each customer• Reliable / Slow Payer / High Risk customer categories• Public token-based customer payment pages• “I’ve paid this invoice” customer action• Promise-to-Pay workflow with future payment dates• Automatic collection resumption when a promise is missed• Invoice and customer activity timelines• Recovery, ageing and payment-risk analytics• Business settings and email configuration• Email/password authentication• Google OAuth authentication• Realistic demo data for new accountsSECURITY & DATA ISOLATIONPayChaser uses Supabase authentication and PostgreSQL with Row Level Security. Each business account is scoped to its own customers, invoices, automation stages, promises and activity records.Public customer payment and Promise-to-Pay pages use invoice-specific tokens, allowing customers to respond without creating an account while keeping business data isolated.TECH STACK• React 19• TypeScript• TanStack Start• TanStack Router• TanStack Query• Vite• Tailwind CSS• Supabase / PostgreSQL• Supabase Auth• Row Level Security• Resend HTTP API• React Hook Form• Zod• Recharts• Radix UI-based componentsCURRENT PRODUCT STATUSPayChaser is a developed full-stack SaaS MVP with database, authentication, account-level data isolation, collection workflows, analytics and transactional email infrastructure already implemented.The product is currently pre-revenue and is being sold as a software asset and commercial SaaS foundation rather than as an established revenue-generating business.WHAT THE BUYER GETSThe buyer receives the PayChaser source code, existing product interface and workflows, database schema and migrations, authentication implementation, collection automation structure, email integration code, demo-data system and project documentation required to continue development and deployment.GROWTH OPPORTUNITYA buyer can commercialize PayChaser by introducing subscription plans and targeting contractors, tradespeople, agencies and service businesses that regularly deal with overdue invoices.Future expansion opportunities include accounting integrations, additional communication channels, advanced reporting, team features and deeper payment automation.WHY PAYCHASERPayChaser gives a buyer significantly more than a dashboard concept or front-end template. Core SaaS infrastructure — authentication, database, account isolation, collection workflows, customer payment interactions, email delivery and analytics — is already implemented.This allows the next owner to focus on commercialization, customer acquisition and additional integrations instead of rebuilding the core product from scratch.