Top billing and invoicing software today include QuickBooks Online, Xero, FreshBooks, Zoho Invoice, Stripe Invoicing, Bill.com, Wave, Sage Accounting, Invoicely, and Square Invoices. These tools offer key features like automated invoice creation, recurring billing, tax calculation, payment gateway integration, expense tracking, financial reporting, multi-currency support, and cloud access. QuickBooks, Xero, and Zoho are best for growing SMBs due to strong accounting integration and scalability, while FreshBooks and Wave are ideal for freelancers because of simplicity and ease of use. Stripe and Bill.com suit more advanced or enterprise workflows with strong automation and payment processing. Overall, pricing ranges from free basic tools to premium enterprise platforms depending on features, scale, and integration needs.