QuickBilling is free invoicing software with open tracking, built for freelancers, contractors and small businesses. Send invoices and estimates as a secure link or PDF, and see the moment your client opens them, with location and device on Premium and Unlimited plans. Automatic reminders go out before and after the due date and stop once the invoice is paid.
Clients can view and mark invoices paid without an account, and you can add late fees, convert accepted quotes into invoices in one step, and schedule recurring invoices. QuickBilling also covers expense tracking, receipts, VAT summaries, year-end tax drafts, custom branding and templates, invoice analytics, a developer API and an MCP server for AI assistants. Free plan with no credit card; paid plans from $15 a month.
