[OSS GAP] Invoice / Billing #billing #self-hosted #too-expensive #solo-founder
Pain: Solos and micro-businesses mostly want invoices, reminders, and payment links — not accounting software subscriptions with admin bloat. “JTBD: When a client invoice passes its due date, I want a structured follow-up sequence that escalates politely and automatically, so I can recover payment without the awkwardn” — github-issues (https://github.com/muaddibco/RealWorldProblems/issues/726)
Why now: Small teams in 2026 are cutting tool spend and refusing extra platform debt. FreshBooks, Harvest, Zoho Invoice are strong products, but they are packaged for bigger companies than freelancer and other small teams. That makes a smaller, self-hosted wedge in invoice / billing unusually easy to explain.
Tiny wedge: Invoice builder for freelancer and other small teams without FreshBooks-style pricing and platform weight.
Why this wins: Replaces recurring FreshBooks spend with a boring self-hosted alternative for freelancer and other small teams.
Scope cut: Skip full accounting ledger and ERP suite in v1.
Stack: Node.js + Express + PostgreSQL + Web Components.