Open-Source Billing And Rating Platform For Subscription
C++ version of Ted Dunning's merging t-digest
Open-Source Billing And Rating Platform For Subscription
Open source subscription and usage-based billing platform.
An opinionated read-only Stripe MCP server for indie SaaS founders to ask AI about MRR, churn, failed payments, dunning recovery, disputes, at-risk customers, and support context in plain English.
Stripe payment recovery SaaS — automatically retry failed charges, send dunning emails, and track recovered revenue for SaaS businesses.
Multi-tenant usage billing control plane with direct Stripe integration — pricing catalog, invoicing, payments, dunning, and operator tooling.
Agent skills for Stripe-native SaaS founders fighting churn — by Unchurn (https://unchurn.dev)
Subscription billing as a state machine: trials, renewals, dunning, proration, cancellation. Exact Decimal money, zero dependencies.
Non-custodial failed-payment recovery (dunning) engine - Java 21 + Spring Modulith over PostgreSQL.
Managed recurring billing engine built natively on Nomba. One API call starts a subscription. Everything after — dunning, renewals, recovery, ledger is handled automatically.
Open-source agent skills for accounts receivable in Xero and QuickBooks. Aged receivables, DSO, late fee schedules, customer statements, and chase email briefs. Every figure is computed by a tested script, never by the model. Works with Claude, Claude Code, Codex and Cursor.
Automated dunning for overdue invoices — a deterministic, well-tested RPA tool that sends staged payment reminders. Runs with no credentials via mock fixtures; optional LLM for message tone only, never billing logic.
Open-source Slack bot that chases overdue invoices: reads QuickBooks or Wave, drafts gentle-to-firm reminders, and sends via Gmail only after you approve. No database, no payment rails, no auto-send. A human-in-the-loop alternative to Bill.com-style dunning for founders, freelancers, and bookkeepers. MIT.
Test-mode Stripe billing reference on FastAPI: seat + metered pricing, trials, upgrade/downgrade proration, dunning, Stripe Tax, customer portal, Connect payouts. Webhooks survive duplicate, out-of-order and dropped deliveries: the chaos harness ran 45 deliveries, 0 double charges.
Source code of my personal portfolio website and digital resume
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