BillingBee is a free, AI-powered client revenue platform for freelancers. Describe a project — AI writes the proposal, generates a contract, and creates a tax-ready invoice. Clients sign and pay via Stripe, Razorpay, or PayPal, no account needed. Late payments trigger automatic AI follow-ups. Includes AI cashflow forecasting, GST-ready India billing, and multi-currency support. Free to start with 5 documents/month; Pro unlocks unlimited use and full reporting.